Relevant bibliographies by topics / Acetylacetonat / Journal articles
To see the other types of publications on this topic, follow the link: Acetylacetonat.

Journal articles on the topic 'Acetylacetonat'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Acetylacetonat.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

D�ring, M., E. Uhlig, K. Brodersen, and A. Wolski. "Metallionenaustausch im System Acetylacetonat/Halogenid/Tetrahydrofuran." Zeitschrift f�r anorganische und allgemeine Chemie 619, no. 4 (April 1993): 753–60. http://dx.doi.org/10.1002/zaac.19936190419.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zhu, Yuner, and Philip D. Evans. "Surface Protection of Wood with Metal Acetylacetonates." Coatings 11, no. 8 (July 30, 2021): 916. http://dx.doi.org/10.3390/coatings11080916.

Full text
Abstract:
Metal acetylacetonates are coordination complexes of metal ions and the acetylacetonate anion with diverse uses including catalysts, cross-linking agents and adhesion promotors. Some metal acetylacetonates can photostabilize polymers whereas others are photocatalysts. We hypothesize that the ability of metal acetylacetonates to photostabilize wood will vary depending on the metal in the coordination complex. We test this hypothesis by treating yellow cedar veneers with different acetylacetonates (Co, Cr, Fe, Mn, Ni, and Ti), exposing veneers to natural weathering in Australia, and measuring changes in properties of treated veneers. The most effective treatments were also tested on yellow cedar panels exposed to the weather in Vancouver, Canada. Nickel, manganese, and titanium acetylacetonates were able to restrict weight and tensile strength losses and delignification of wood veneers during natural weathering. Titanium acetylacetonate was as effective as a reactive UV absorber at reducing the greying of panels exposed to 6 months of natural weathering, and both titanium and manganese acetylacetonates reduced the photo-discoloration of panels finished with a polyurethane coating. We conclude that the effectiveness of metal acetylacetonates at photostabilizing wood varies depending on the metal in the coordination complex, and titanium and manganese acetylacetonate show promise as photoprotective primers for wood.
APA, Harvard, Vancouver, ISO, and other styles
3

Dikio, Charity W., Ikechukwu P. Ejidike, Fanyana M. Mtunzi, Michael J. Klink, and Ezekiel D. Dikio. "HYDRAZIDE SCHIFF BASES OF ACETYLACETONATE METAL COMPLEXES: SYNTHESIS, SPECTROSCOPIC AND BIOLOGICAL STUDIES." International Journal of Pharmacy and Pharmaceutical Sciences 9, no. 12 (December 1, 2017): 257. http://dx.doi.org/10.22159/ijpps.2017v9i12.22225.

Full text
Abstract:
Objective: The study was focused on the synthesis and spectroscopic studies of metal acetylacetonates and their complexes using bidentate Schiff-base ligands (NO), evaluation of their in-vitro antibacterial potentials against pathogenic microorganism.Methods: Acetylacetonate salts of Cobalt(II), Manganese(II) and Magnesium(II) were prepared by reacting their metal hydroxides with acetylacetone. The metal complexes of N'-{(E)-[4-(diethylamino)-2-hydroxyphenyl]methylidene}-4-nitrobenzohydrazide (HL1), N'-{(E)-[4-(diethylamino)-2-hydroxyphenyl]methylidene}-4-methoxybenzohydrazide (HL2) obtained from the condensation reaction of 4-(diethylamino)-2-hydroxybenzaldehyde and 4-nitrobenzohydrazide/ or 4-methoxybenzohydrazide. The synthesized compounds were characterized by fourier transform infrared spectroscopy (FT-IR), proton and carbon-13 nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA). The compounds were screened for their antimicrobial properties against a list of Gram-positive bacterial strains.Results: The FT-IR spectra revealed that the Schiff bases acts as bidentate chelating ligand via nitrogen of the azomethine and phenolic oxygen atoms. NMR reveal the presence of azomethine (HC=N) and aromatic hydrogens at expected chemical shifts confirming the formation of the Schiff base ligands. Thermal decomposition behaviour was studied by thermogravimetry revealing stability up to 260 °C. The compounds were evaluated for their antibacterial potentials against Staphylococcus aureus and Enterococcus faecalis. The manganese acetylacetonato(N'-{(E)-[4-(diethylamino)-2-hydroxyphenyl]methylidene}-4-methoxybenzohydrazide: Mn(acac)(L2) exhibited antimicrobial activities against both Enterococcus faecalis and Staphylococcus aureus with a minimum inhibitory concentration (MIC) of 398.0 μg/mL.Conclusion: The prepared compounds showed no inhibition against the selected pathogenic microorganisms except for Mn(acac)(L2) Standard antibacterial compounds: ampicillin and ciprofloxacin were used as positive control. The antibacterial activity of the compound depends on the kind of substituent on the benzo hydrazide rings at the para position, thereby suggesting the compound as promising chemotherapeutic agents for further structural optimization.
APA, Harvard, Vancouver, ISO, and other styles
4

Sriyanti, Sriyanti. "Bilangan Oksidasi dan Reaksi-Reaksi Mangan." Jurnal Kimia Sains dan Aplikasi 3, no. 1 (February 1, 2000): 171–76. http://dx.doi.org/10.14710/jksa.3.1.171-176.

Full text
Abstract:
Telah dilakukan pembuatan tris (2,4-pentanadionato) Mangan (III), Kalium manganat dan Kalium permanganat untuk mempelajari bilangan oksidasi mangan. Dilakukan pula reaksi-reaksi sederhana terhadap mangan untuk mengamati mangan pada berbagai keadaan tingkat oksidasi. Hasil yang diperoleh menunjukan bahwa Mangan (II) stabil dalam suasana asam, Mangan (III) tidak stabil dan dapat distabilkan dengan pembentukan kompleks mangan-acetylacetonat, Mangan (IV) stabil dalam bentuk oksidanya (MnO2), Mangan (VI) atau manganat stabil dalam suasana basa kuat dan Mangan (VII) atau permanganat hanya stabil dalam suasana asam.
APA, Harvard, Vancouver, ISO, and other styles
5

Abu-Rayyan, Ahmed, Qutaiba Abu-Salem, Eyad Mallah, Cäcilia Maichle-Mößmer, Manfred Steimann, Norbert Kuhn, and Klaus-Peter Zeller. "The Acetylacetonate Ion as its E/Z-Isomer in 1,3-Diisopropyl-4,5- dimethylimidazolium Acetylacetonate." Zeitschrift für Naturforschung B 63, no. 12 (December 1, 2008): 1438–40. http://dx.doi.org/10.1515/znb-2008-1216.

Full text
Abstract:
1,3-Diisopropyl-4,5-dimethylimidazolium acetylacetonate (2) is obtained from 2,3-dihydro-1,3-diisopropyl-4,5-dimethylimidazol- 2-ylidene (1) and acetylacetone. Its crystal structure reveals the presence of ion pairs linked by C-H ··· O hydrogen bonds. In 2, the acetylacetonate ion adopts the structure of its E/Z-isomer (C).
APA, Harvard, Vancouver, ISO, and other styles
6

Bennett, Martin A., Thomas R. Mitchell, Mark R. Stevens, and Anthony C. Willis. "Mono- and bis-(acetylacetonato) complexes of arene-ruthenium(II) and arene-osmium(II): variation of the binding mode of η1-acetylacetonate with the nature of the arene." Canadian Journal of Chemistry 79, no. 5-6 (May 1, 2001): 655–69. http://dx.doi.org/10.1139/v01-076.

Full text
Abstract:
The mono(acetylacetonato) complexes [MCl(O,O'-acac)(η6-arene)] (M = Ru, Os, arene = C6H6, 1,3,5-C6H3Me3, C6Me6; M = Os, arene = 1,2-C6H4Me2, 1,2,3-C6H3Me3), which are formed from [MCl2(η6-arene)]2 and thallium or sodium acetylacetonate, react with thallium acetylacetonate to give bis(acetylacetonato) complexes [M(O,O'-acac)(η1-acac)(η6-arene)]. The η1-acac ligand is bound through the gamma-carbon atom for M = Ru, Os, arene = C6H6; M = Os, arene = 1,2-C6H4Me2, 1,2,3-C6H3Me3 and through a keto-oxygen atom for M = Ru, Os, arene = 1,3,5-C6H3Me3, C6Me6, the difference being attributed to a combination of steric and electronic effects. Cationic ruthenium(II) derivatives [Ru(L)(O,O'-acac)(η6-arene]+ (arene = C6H6, 1,3,5-C6H3Me3, C6Me6; L = DMSO, MeCN, py, PPh3) and [Ru(CO)(O,O'-acac)(η6-arene]+ (arene = 1,3,5-C6H3Me3,C6Me6), and neutral osmium(II) η1-acetato derivatives [Os(η1-OAc)(O,O'-acac)(η6-arene)] (arene = C6H6, 1,2-C6H4Me2, 1,2,3-C6H3Me3, 1,3,5-C6H3Me3, C6Me6) are also described. The molecular structures of the following complexes have been determined by X-ray crystallography: [Os(O,O'-acac)(η1-C-acac)(η6-1,2-C6H4Me2)], triclinic, space group P[Formula: see text] (No. 2), a = 9.922(2), b = 9.974(2), and c = 11.001(2) Å, α = 68.33(1), β = 64.18(1), and γ = 62.38(1)°, V = 849.0(3) Å3, Z = 2; [Os(O,O'-acac)(η1-O-acac)(η6-1,3,5-C6H3Me3)], monoclinic, space group C2/c (No. 15), a = 16.032(4), b = 11.989(3), and c = 21.562(7) Å, β= 108.91(2)°, V = 3921(2) Å, Z = 8; [Os(η1-OAc)(O,O'-acac)(η6-C6H6)], triclinic, space group P[Formula: see text] (No. 2), a = 8.368(4), b = 8.402(4), and c = 11.008(4) Å, α = 71.68(3), β = 69.35(3), and γ = 69.77(3)°, V = 663.0(6) Å3, Z = 2.Key words: arene-ruthenium, arene-osmium, acetylacetone, crystal structures.
APA, Harvard, Vancouver, ISO, and other styles
7

Gaube, W., and St Lifson. "�ber die Reduktion von Nickel(II)-acetylacetonat mit n-Hexyllithium in Kohlenwasserstoffen." Zeitschrift f�r anorganische und allgemeine Chemie 585, no. 1 (June 1990): 189–96. http://dx.doi.org/10.1002/zaac.19905850121.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Warneke, Jonas, Willem F. Van Dorp, Petra Rudolf, Michal Stano, Peter Papp, Štefan Matejčík, Tobias Borrmann, and Petra Swiderek. "Acetone and the precursor ligand acetylacetone: distinctly different electron beam induced decomposition?" Physical Chemistry Chemical Physics 17, no. 2 (2015): 1204–16. http://dx.doi.org/10.1039/c4cp04239e.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kutschabsky, Leo, Gyula Argay, Gerhard W. Fischer, and Thomas Zimmermann. "Molekül- und Kristallstruktur des Adduktes aus Acetylacetonat und 3-Methyl-2,4,6-triphenyl-pyryliumkation." Zeitschrift für Chemie 24, no. 6 (August 31, 2010): 216–17. http://dx.doi.org/10.1002/zfch.19840240612.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Gehrke, K., H. W. Pohlmann, and M. Harwart. "Polymerisation von Styren und Copolymerisation mit Butadien mit dem Katalysatorsystem Nickel-ll-acetylacetonat/Ethylaluminiumsesquichlorid." Acta Polymerica 40, no. 1 (January 1989): 60–62. http://dx.doi.org/10.1002/actp.1989.010400113.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Atencio, Reinaldo, Gustavo Chacón, Lisbeth Mendoza, Teresa González, Julia Bruno-Colmenarez, Merlin Rosales, Briceño Alexander, and Edgar Ocando-Mavárez. "Chemistry of transition-metal complexes containing functionalized phosphines: synthesis and structural analysis of rhodium(I) complexes containing allyl and cyanoalkylphosphines." Acta Crystallographica Section C Structural Chemistry 76, no. 9 (August 30, 2020): 932–46. http://dx.doi.org/10.1107/s2053229620011420.

Full text
Abstract:
A series of related acetylacetonate–carbonyl–rhodium compounds substituted by functionalized phosphines has been prepared in good to excellent yields by the reaction of [Rh(acac)(CO)2] (acac is acetylacetonate) with the corresponding allyl-, cyanomethyl- or cyanoethyl-substituted phosphines. All compounds were fully characterized by 31P, 1H, 13C NMR and IR spectroscopy. The X-ray structures of (acetylacetonato-κ2 O,O′)(tert-butylphosphanedicarbonitrile-κP)carbonylrhodium(I), [Rh(C5H7O2)(CO)(C8H13N2)] or [Rh(acac)(CO)(tBuP(CH2CN)2}] (2b), (acetylacetonato-κ2 O,O′)carbonyl[3-(diphenylphosphanyl)propanenitrile-κP]rhodium(I), [Rh(C5H7O2)(C15H14N)(CO)] or [Rh(acac)(CO){Ph2P(CH2CH2CN)}] (2h), and (acetylacetonato-κ2 O,O′)carbonyl[3-(di-tert-butylphosphanyl)propanenitrile-κP]rhodium(I), [Rh(C5H7O2)(C11H22N)(CO)] or [Rh(acac)(CO){tBu2P(CH2CH2CN)}] (2i), showed a square-planar geometry around the Rh atom with a significant trans influence over the acetylacetonate moiety, evidenced by long Rh—O bond lengths as expected for poor π-acceptor phosphines. The Rh—P distances displayed an inverse linear dependence with the coupling constants J P-Rh and the IR ν(C[triple-bond]O) bands, which accounts for the Rh—P electronic bonding feature (poor π-acceptors) of these complexes. A combined study from density functional theory (DFT) calculations and an evaluation of the intramolecular H...Rh contacts from X-ray diffraction data allowed a comparison of the conformational preferences of these complexes in the solid state versus the isolated compounds in the gas phase. For 2b, 2h and 2i, an energy-framework study evidenced that the crystal structures are mainly governed by dispersive energy. In fact, strong pairwise molecular dispersive interactions are responsible for the columnar arrangement observed in these complexes. A Hirshfeld surface analysis employing three-dimensional molecular surface contours and two-dimensional fingerprint plots indicated that the structures are stabilized by H...H, C...H, H...O, H...N and H...Rh intermolecular interactions.
APA, Harvard, Vancouver, ISO, and other styles
12

Halz, Jan Henrik, Christian Heiser, Christoph Wagner, and Kurt Merzweiler. "Syntheses and crystal structures of three [M(acac)2(TMEDA)] complexes (M = Mn, Fe and Zn)." Acta Crystallographica Section E Crystallographic Communications 76, no. 1 (January 1, 2020): 66–71. http://dx.doi.org/10.1107/s2056989019016372.

Full text
Abstract:
The complexes bis(acetylacetonato-κ2 O,O′)(N,N,N′,N′-tetramethylethylenediamine-κ2 N,N′)manganese(II), [Mn(C5H7O2)2(C6H16N2)], bis(acetylacetonato-κ2 O,O′)(N,N,N′,N′-tetramethylethylenediamine-κ2 N,N′)iron(II), [Fe(C5H7O2)2(C6H16N2)], and bis(acetylacetonato-κ2 O,O′)(N,N,N′,N′-tetramethylethylenediamine-κ2 N,N′)zinc(II), [Zn(C5H7O2)2(C6H16N2)], were synthesized from the reaction of the corresponding metal acetylacetonates [M(acac)2(H2O)2] with N,N,N′,N′-tetramethylethylenediamine (TMEDA) in toluene. Each of the complexes displays a central metal atom which is nearly octahedrally surrounded by two chelating acac and one chelating TMEDA ligand, resulting in an N2O4 coordination set. Despite the chemical similarity of the complex units, the packing patterns for compounds 1–3 are different and thus the crystal structures are not isotypic.
APA, Harvard, Vancouver, ISO, and other styles
13

Baldo, Bianca, Carlos Cruz, Diego Venegas-Yazigi, Andres Vega, and Verónica Paredes-García. "catena-Poly[tris(μ3-acetylacetonato)nickelate(II)sodium(I)]." Acta Crystallographica Section C Crystal Structure Communications 69, no. 5 (April 23, 2013): 506–8. http://dx.doi.org/10.1107/s0108270113009797.

Full text
Abstract:
The title complex, [NaNi(C5H7O2)3]n, contains an anionic tris(acetylacetonato)nickelate(II) unit, [Ni(acac)3]−(acac is acetylacetonate), with a highly regular octahedral coordination geometry. The NiIIcation lies on a Wyckoffasite, resulting inD3symmetry of the anion. Charge balance is provided by sodium cations, which occupy Wyckoff typebsites. Each sodium cation is surrounded by two [Ni(acac)3]−anions, each of which is connected to the alkali metal through three O atoms, in afacconfiguration. This arrangement leads to the formation of linear [Na{Ni(acac)3}]nchains along thecaxis. The Ni...Na distance is 2.9211 (10) Å. The title complex is one of the few examples of heterometallic systems based on alkali and transition metal cations bridged by acetylacetonate ligands.
APA, Harvard, Vancouver, ISO, and other styles
14

David, Lawrence D., Ronald M. Anderson, Joseph M. Dynys, Charles C. Goldsmith, and Andrew Szule. "Synthesis and characterization of cordierite from acetylacetonate/alkoxide precursors." Journal of Materials Research 8, no. 7 (July 1993): 1697–702. http://dx.doi.org/10.1557/jmr.1993.1697.

Full text
Abstract:
Syntheses of ultrafine glass powders in the MgO–Al2O3–SiO2 ternary oxide system were effected by drying and calcining sols derived from acetylacetonate-tetraethoxysilane ethanol solutions. A mixture of magnesium and aluminum acetylacetonates, dissolved with Si(OC2H5)4 in an ethanol solution in a 2:4:5 Mg: Al: Si mole ratio, was hydrolyzed, spray-dried, and calcined to yield a glass powder of 70 Å primary particle size, which sintered to densities ≥ 2.5 g/cm3 and which formed μ-cordierite as the only crystalline phase below 1000 °C. Incorporation of dopant quantities of boron and phosphorus, via their alkyl esters in the hydrolysis reaction with Si(OC2H5)4 and the acetylacetonates, afforded powders which crystallized in the α-phase directly after sintering to density = 2.66 g/cm3.
APA, Harvard, Vancouver, ISO, and other styles
15

Granifo, Juan, Rubén Gaviño, Eleonora Freire, and Ricardo Baggio. "Monodentate and bridging behaviour of the sulfur-containing ligand 4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4′′-terpyridine in two discrete zinc(II) complexes with acetylacetonate." Acta Crystallographica Section C Crystal Structure Communications 68, no. 10 (September 1, 2012): m269—m274. http://dx.doi.org/10.1107/s010827011203483x.

Full text
Abstract:
The Zn complexes bis(acetylacetonato-κ2O,O′)bis{4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4′′-terpyridine-κN1}zinc(II), [Zn(C5H7O2)2(C22H17N3S)2], (I), and {μ-4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4′′-terpyridine-κ2N1:N1′′}bis[bis(acetylacetonato-κ2O,O′)zinc(II)], [Zn2(C5H7O2)4(C22H17N3S)], (II), are discrete entities with different nuclearities. Compound (I) consists of two centrosymmetrically related monodentate 4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4′′-terpyridine (L1) ligands binding to one ZnIIatom sitting on an inversion centre and two centrosymmetrically related chelating acetylacetonate (acac) groups which bindviacarbonyl O-atom donors, giving an N2O4octahedral environment for ZnII. Compound (II), however, consists of a bis-monodentateL1 ligand bridging two ZnIIatoms from two different Zn(acac)2fragments. Intra- and intermolecular interactions are weak, mainly of the C—H...π and π–π types, mediating similar layered structures. In contrast to related structures in the literature, sulfur-mediated nonbonding interactions in (II) do not seem to have any significant influence on the supramolecular structure.
APA, Harvard, Vancouver, ISO, and other styles
16

Jacob, K., and K. H. Thiele. "Beitr�ge zur Chemie der Alkylverbindungen von �bergangsmetallen. XLIX. Reaktionen von Cerium(IV)-acetylacetonat mit Lithium- und Magnesiumorganylen." Zeitschrift f�r anorganische und allgemeine Chemie 543, no. 12 (December 1986): 192–98. http://dx.doi.org/10.1002/zaac.19865431223.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Richers, Casseday P., Jeffery A. Bertke, and Thomas B. Rauchfuss. "Crystal structure of bis(acetylacetonato-κ2O,O′)(tetrahydrofuran-κO)(trifluoromethanesulfonato-κO)iron(III)." Acta Crystallographica Section E Crystallographic Communications 71, no. 10 (September 12, 2015): 1165–68. http://dx.doi.org/10.1107/s2056989015016849.

Full text
Abstract:
The mononuclear title complex, [Fe(CF3O3S)(C5H7O2)2(C4H8O)] or [Fe(acac)2(OTf)(THF)] (acac = acetylacetonate; OTf = trifluoromethanesulfonate; THF = tetrahydrofuran), (I), consists of one six-coordinate Fe3+atom in a slightly distorted octahedral environment [Fe—O bond-length range = 1.9517 (11)–2.0781 (11) Å]. The triflate ligand was found to be disordered over two sets of sites, with a site-occupancy ratio of 0.622 (16):0.378 (16). Weak intermolecular C—H...O and C—H...F hydrogen-bonding interactions generate a two-dimensional supramolecular structure lying parallel to (100). This is only the second crystal structure reported of a mononuclear bis(acetylacetonato)iron(III) complex.
APA, Harvard, Vancouver, ISO, and other styles
18

Dziemidkiewicz, Anna, and Magdalena Maciejewska. "Manganese and Nickel Acetylacetonates as Curatives for Chloroprene Rubber Based on Heck’s Reaction." Materials 14, no. 4 (February 8, 2021): 807. http://dx.doi.org/10.3390/ma14040807.

Full text
Abstract:
The commonly used curing system for chloroprene rubber (CR) is a combination of two metal oxides, such as magnesium oxide (MgO) and zinc oxide (ZnO). Application of MgO and ZnO enables to obtain a good balance between processability of rubber compounds and mechanical properties of the vulcanizates. Despite high activity in crosslinking reactions, ZnO is classified as ecotoxic to aquatic organisms, thus environmental legislation requires its quantity in technology to be limited. In our studies more environmentally friendly curing systems were applied, which enabled eliminating ZnO from CR compounds. These curing systems consisted of manganese acetylacetonate (Mn(acac)) or nickel acetylacetonate (Ni(acac)) and triethanolamine (TEOA) used as a base necessary to perform Heck’s reaction. Both metal acetylacetonates exhibited high activity in crosslinking reactions, which was confirmed by a great torque increment during rheometric measurements and high degree of elastomer crosslinking. The type of metal acetylacetonate and the amount of TEOA seemed to have less influence on the efficiency of the curing system than the filler used. Rubber compounds filled with carbon black (CB) were characterized by definitely shorter optimal vulcanization times and higher degree of crosslinking compared to CR composites filled with nanosized SiO2. Moreover, application of the proposed curing systems allowed to obtain CR vulcanizates with mechanical properties comparable with the benchmarks cured with metal oxides.
APA, Harvard, Vancouver, ISO, and other styles
19

Nagasawa, Akira, Hideaki K. Tanaka, Masayuki Miyoshi, and Kazuo Saito. "Ligand isotopic exchange of cis-bis(acetylacetonato)dioxomolybdenum(VI) in acetylacetone." Inorganic Chemistry 26, no. 24 (December 1987): 4035–39. http://dx.doi.org/10.1021/ic00271a015.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Yiase, S. G., S. O. Adejo, and S. T. Iningev. "Manganese (II) and Cobalt (II) Acetylacetonates as Antimicrobial Agents." NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES 1 (March 14, 2019): 176–85. http://dx.doi.org/10.46912/napas.43.

Full text
Abstract:
Mn(II) and Co(II) complexes were prepared by reaction of the metal chlorides with acetylacetone in ammonical aqueous medium. The metal complexes were prepared in order to investigate their antimicrobial activity on some selected pathogens. The characterisation of the complexes was on the basis of various spectroscopic techniques like infrared and ultraviolet studies. The compounds were subjected to antimicrobial activity screening using serial broth dilution method. Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal/Fungicidal Concentration (MBC/MFC) were determined. Mn(II) complex has shown significantly both antibacterial and antifungal activity with a MIC of 1.25 μg/mL while Co(II) complex was noticeable for antifungal activity at the same concentration. Whereas Mn(II) acetylacetonate is a more potent bactericide while Co(II) acetylacetonate is a more potent fungicide, both with MBC/MFC value of 2.5 μg/mL. Antimicrobial agent of the ligand has enhanced on complexation with Mn(II) and Co(II) ions. Though, the potency of the prepared antibiotics on the tested microbes is less compared to the standard drugs (Ciprofloxacin and Fulcin).
APA, Harvard, Vancouver, ISO, and other styles
21

Panasenko, Alexander E., Lyudmila A. Zemnukhova, and Nicolay P. Shapkin. "Fabrication and extraction of silicon-containing products from rice husks." Butlerov Communications 61, no. 1 (January 31, 2020): 133–39. http://dx.doi.org/10.37952/roi-jbc-01/20-61-1-133.

Full text
Abstract:
To isolate silicon-containing products from plant materials, the reaction of interaction of rice husks with triethanolamine and ethylene glycol have been investigated. The effect of pretreatment of raw materials and the reaction conditions on the yield of soluble products containing silicon has been studied. It has been shown that the highest enrichment of rice husks with silicon occurs upon its treatment with concentrated hydrochloric acid and the Schweitzer's reagent. The highest degree of silicon extraction (69%) was achieved at using native rice husks and vanadyl acetylacetonate as a catalyst. The resulting solution contained silicon in the form of silatrane fragments. In order to isolate a silicon-containing product from the ethylene glycol solution, which would have the prospect of practical use and the maximum silicon yield, the heterofunctional polycondensation method was applied. It has appeared to be possible to isolate solid products using acetylacetonates of trivalent and tetravalent metals, which formed metal siloxanes. The structure of the obtained compounds has been confirmed by the element and X-ray diffraction analysis, as well as by the IR spectroscopy. When using rice husk chaffs as a silicon source, the product of the reaction with ethylene glycol and triethanolamine has appeared to be an irregular copolymer comprising amorphous silicon dioxide fragments and cyclic fragments similar in structure to that of silatranes. The application of metal acetylacetonates has made it possible to isolate silicon derivatives in the form of organometallic siloxanes. Тhe yield of metalsiloxanes increased in the sequence Zr < Fe < Al. Apparently, this was due to formation of lattice structures in the case of trivalent aluminum and iron, while zirconium had two remaining acetylacetonate groups and, in this case, its functionality was lower than for trivalent metals, which was confirmed by the spectral data.
APA, Harvard, Vancouver, ISO, and other styles
22

Dorokhov, V. A., and A. V. Komkov. "Addition of acetylacetone and ethyl acetoacetate to carbodiimides promoted by nickel acetylacetonate." Russian Chemical Bulletin 53, no. 3 (March 2004): 676–80. http://dx.doi.org/10.1023/b:rucb.0000035656.94284.ee.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Abdallah, H., M. S. Shalaby, and A. M. H. Shaban. "Performance and Characterization for Blend Membrane of PES with Manganese(III) Acetylacetonate as Metalorganic Nanoparticles." International Journal of Chemical Engineering 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/896486.

Full text
Abstract:
This study describes the preparation, characterization, and evaluation of performance of blend Polyethersulfone (PES) with manganese(III) acetylacetonate Mn(acac)3to produce reverse osmosis blend membrane. The manganese(III) acetylacetonate nanoparticles were prepared by a simple and environmentally benign route based on hydrolysis of KMnO4followed by reaction with acetylacetone in rapid stirring rate. The prepared nanoparticle powder was dissolved in polymer solution mixture to produce RO PES/Mn(acac)3blend membrane, without any treatment of Polyethersulfone membrane surface. The membrane morphology, mechanical properties, and performance were presented. The scanning electron microscopy (SEM) images have displayed a typical asymmetric membrane structure with a dense top layer due to the migration of Mn(acac)3nanoparticles to membrane surface during the phase inversion process. Contact angle measurements have indicated that the hydrophilicity of the membrane was improved by adding Mn(acac)3. AFM images have proved excellent pores size distribution of blend membrane and lower surface roughness compared with bare PES. The desalination test was applied to blend membrane, where the blend membrane provided good performance; particularly, permeate flux was 24.2 Kg/m2·h and salt rejection was 99.5%.
APA, Harvard, Vancouver, ISO, and other styles
24

Dziemidkiewicz, Anna, Magdalena Maciejewska, and Martyna Pingot. "Thermal analysis of halogenated rubber cured with a new cross-linking system." Journal of Thermal Analysis and Calorimetry 138, no. 6 (November 2, 2019): 4395–405. http://dx.doi.org/10.1007/s10973-019-08881-7.

Full text
Abstract:
Abstract The aim of this work was to examine the influence of new curing agents proposed for brominated butyl rubber (BIIR) on the cross-linking process of rubber compounds and the thermal behavior of the vulcanizates. Rubber blends that were filled with carbon black and contained acetylacetonates of different transition metals in the presence of triethanolamine (TEOA) as new cross-linking agents were prepared. The performed studies showed that metal acetylacetonates (Me(acac)) are effective cross-linking agents for BIIR, which was confirmed by high values of the torque increment (∆M) and significant cross-linking degree of the vulcanizates (α(T)). The most active curing agent seems to be iron acetylacetonate (Fe(acac)). Its application results in a shorter optimal vulcanization time, lower onset vulcanization temperature and similar vulcanization enthalpy compared to the BIIR cured with a sulfur curing system. The BIIR vulcanizates cured with Me(acac) reveal good mechanical properties with tensile strengths in the range of 9–14 MPa and better damping properties comparing to the sulfur-cured rubber. The proposed curing agents do not significantly affect the thermal stability of the BIIR vulcanizates.
APA, Harvard, Vancouver, ISO, and other styles
25

Rozentsveig, I. B., G. N. Chernysheva, G. G. Levkovskaya, A. I. Fedotova, E. V. Tret’yakov, and G. V. Romanenko. "Noncatalytic C-amidoalkylation of acetylacetone and chromium acetylacetonate with N-sulfonyl polychloroacetaldehyde imines." Russian Journal of Organic Chemistry 50, no. 1 (January 2014): 1–5. http://dx.doi.org/10.1134/s1070428014010011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Sliusarchuk, Lyudmila, Lidia Zheleznova, and Artem Mishchenko. "MIXED-LIGAND ACETYLACETONATE COMPLEXES OF LANTANUM (III) AND GADOLINIUM (III) WITH CARBOXYLIC ACIDS AND ACETONITRILE OR DIMETHYLFORMAMIDE." Ukrainian Chemistry Journal 85, no. 1 (April 4, 2019): 3–12. http://dx.doi.org/10.33609/0041-6045.85.1.2019.3-12.

Full text
Abstract:
This paper presents the study of mixed-ligand complexes of Ln(III), which are used as volatile precursors in CVD processes for the preparation of lanthanide-containing films and coatings. New mixed-ligand acetylacetonate complexes of lanthanides (III) with acetic (propionic) acid and acetonitrile or dimethylformamide were synthesized and investigated by physic-chemical methods of analysis (elemental analysis, differential thermal analysis, IR spectroscopy, powder X-ray diffraction). Using mixed-ligand complexation, the properties of the initial lanthanide β-diketonates (in particular, chemical and thermal stability) can be changed significantly. To assess the stability of the synthesized mixed-ligand complexes, their quantum-chemical modeling was performed using the semi-empirical method Sparkle/PM7. Standard changes of the Gibbs energy ∆G0298 were calculated for the solution reaction of (1) synthesis of mixed-ligand complexes and (2) substitution of one of the β-diketonate ligands in the Ln(III) tris-acetylacetonates dihydrates by an acetate ion or propionate ion. The ∆G0298 values for the syntesis reaction mainly increases with increasing donor basicity and decreasing ionic radii Ln(III) in the La>Gd>Lu series. For all mixed ligand complexes of Ln(III), the heats of formation are negative, which indicates their thermodynamic stability in solution. It was established that the obtained complexes have the same composition of the general formula [Ln(AA)2·L·2D], where Ln (III) = La, Gd; НАА- acetylacetonе; L - anion of acetic (HAc) or propionic (HРrop) acids, D- acetonitrile (AN), dimethylformamide (DMFA). The results of the thermal analysis confirm the computational data: in the case of the lanthanum mixed-ligand complexes, the carboxylic acid is coordinated to the central ion through bridging carboxylate-ions, which contributes to the formation of oligomers. The lanthanum mixed-ligand complexes are not volatile due to their oligomeric structure. On the other hand, similar gadolinium complexes are monomeric and sublimate at 180 - 350 °C.
APA, Harvard, Vancouver, ISO, and other styles
27

Butsch, Katharina, Alexander Haseloer, Simon Schmitz, Ingo Ott, Julia Schur, and Axel Klein. "FeIII, CuII and ZnII Complexes of the Rigid 9-Oxido-phenalenone Ligand—Spectroscopy, Electrochemistry, and Cytotoxic Properties." International Journal of Molecular Sciences 22, no. 8 (April 12, 2021): 3976. http://dx.doi.org/10.3390/ijms22083976.

Full text
Abstract:
The three complexes [Fe(opo)3], [Cu(opo)2], and [Zn(opo)2] containing the non-innocent anionic ligand opo− (opo− = 9-oxido-phenalenone, Hopo = 9-hydroxyphenalonone) were synthesised from the corresponding acetylacetonates. [Zn(opo)2] was characterised using 1H nuclear magnetic resonance (NMR) spectroscopy, the paramagnetic [Fe(opo)3] and [Cu(opo)2] by electron paramagnetic resonance (EPR) spectroscopy. While the EPR spectra of [Cu(opo)2] and [Cu(acac)2] in dimethylformamide (DMF) solution are very similar, a rather narrow spectrum was observed for [Fe(opo)3] in tetrahydrofuran (THF) solution in contrast to the very broad spectrum of [Fe(acac)3] in THF (Hacac = acetylacetone, 2,4-pentanedione; acac− = acetylacetonate). The narrow, completely isotropic signal of [Fe(opo)3] disagrees with a metal-centred S = 5/2 spin system that is observed in the solid state. We assume spin-delocalisation to the opo ligand in the sense of an opo− to FeIII electron transfer. All compounds show several electrochemical opo-centred reduction waves in the range of −1 to −3 V vs. the ferrocene/ferrocenium couple. However, for CuII and FeIII the very first one-electron reductions are metal-centred. Electronic absorption in the UV to vis range are due to π–π* transitions in the opo core, giving Hopo and [Zn(opo)2] a yellow to orange colour. The structured bands ranging from 400 to 500 for all compounds are assigned to the lowest energy π−π* transitions. They show markedly higher intensities and slight shifts for the CuII (brown) and FeIII (red) complexes and we assume admixing metal contributions (MLCT for CuII, LMCT for FeIII). For both complexes long-wavelength absorptions assignable to d–d transitions were detected. Detailed spectroelectrochemical experiments confirm both the electrochemical and the optical assignments. Hopo and the complexes [Cu(opo)2], [Zn(opo)2], and [Fe(opo)3] show antiproliferative activities against HT-29 (colon cancer) and MCF-7 (breast cancer) cell lines in the range of a few µM, comparable to cisplatin under the same conditions.
APA, Harvard, Vancouver, ISO, and other styles
28

Khandelwal, Bishan L., Ajai K. Singh, and Narendra S. Bhandari. "REACTIONS OF ACETYLACETONE WITH ORGANOTELLURIUM(IV) CHLORIDES-C1BONDED ACETYLACETONATES OF TELLURIUM(IV)." Phosphorus and Sulfur and the Related Elements 38, no. 1-2 (July 1988): 157–65. http://dx.doi.org/10.1080/03086648808079710.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Yuge, H., and T. K. Miyamoto. "Dual Behaviour of Acetylacetonate Anions in the Hydrogen-Bonded Supramolecular Structure (Acetylacetonato-O,O')[trans-(1R,2R)-diaminocyclohexane-N,N']platinum(II) Acetylacetonate." Acta Crystallographica Section C Crystal Structure Communications 53, no. 12 (December 15, 1997): 1816–19. http://dx.doi.org/10.1107/s0108270197010792.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Weiß, Erwin, Jürgen Kopf, Thomas Gardein, Siegfried Corbelin, Uwe Schümann, Marko Kirilov, and Galin Petrov. "Magnesium-acetylacetonat, Mg3[MeC(O)CHC(O)Me]6, und Magnesium-(diethoxyphosphinyl)acetonat, Mg3[(EtO)2P(O)CHC(O)Me]6, dreikernige Chelatkomplexe." Chemische Berichte 118, no. 9 (September 1985): 3529–34. http://dx.doi.org/10.1002/cber.19851180909.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Georgi, P., and H. P. Kaps. "Zur Wertigkeit der Szintigraphie mit 111In-Acetylaceton-Eigenleukozyten in der Diagnostik infizierter Totalendoprothesen." Nuklearmedizin 25, no. 01 (1986): 2–8. http://dx.doi.org/10.1055/s-0038-1624310.

Full text
Abstract:
ZusammenfassungAssessment of the Value of Scintigraphy Using 111In-Acetylacetone-Labelled Leukocytes in the Diagnosis of Infected Alloarthroplasties. Scintigraphy with 111In-Acetylaceton-Eigenleukozytenszintigraphie stellt eine Bereicherung bei der Diagnostik entzündlicher Prozesse im Rahmen von Endoprothesen dar. Bei einer vergleichsweise hohen Sensitivität von 95% muß die relativ geringe Spezifität von 74%, bedingt durch gehäuft falsch-positive Szintigramme, berücksichtigt werden. Als Hauptursache sind hier aggressive Granulome zu nennen, die jedoch ausschließlich bei Verwendung von Prothesen mit Pfannen aus Metall-Legierungen und Köpfen aus Polyäthylen auftraten. Da diese Kombination der gelenkbildenden Flächen inzwischen jedoch weitgehend verlassen worden ist, dürften auch die falsch-positiven Befunde seltener werden. Entsprechend ist eine Verbesserung der Spezifität der Methode zu erwarten.
APA, Harvard, Vancouver, ISO, and other styles
32

Pittkowski, Rebecca, and Thomas Strassner. "Enhanced quantum yields by sterically demanding aryl-substituted β-diketonate ancillary ligands." Beilstein Journal of Organic Chemistry 14 (March 21, 2018): 664–71. http://dx.doi.org/10.3762/bjoc.14.54.

Full text
Abstract:
Luminescent organometallic platinum(II) compounds are of interest as phosphors for organic light emitting devices. Their emissive properties can be tuned by variation of the ligands or by specific electron-withdrawing or electron-donating substituents. Different ancillary ligands can have a profound impact on the emission color and emission efficiency of these complexes. We studied the influence of sterically hindered, aryl-substituted β-diketonates on the emission properties of C^C* cyclometalated complexes, employing the unsubstituted methyl-phenyl-imidazolium ligand. The quantum yield was significantly enhanced by changing the auxiliary ligand from acetylacetonate, where the corresponding platinum(II) complex shows only a very weak emission, to mesityl (mes) or duryl (dur) substituted acetylacetonates. The new complexes show very efficient emission with quantum yields >70% in the sky-blue spectral region (480 nm) and short decay times (<3 μs).
APA, Harvard, Vancouver, ISO, and other styles
33

Chow, Yuan L., and Gonzalo E. Buono-Core. "Role of the acetylacetonyl radical in the sensitized photoreduction of bis(acetylacetonato)copper(II)." Journal of the American Chemical Society 108, no. 6 (March 1986): 1234–39. http://dx.doi.org/10.1021/ja00266a018.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Dziemidkiewicz, Anna, Martyna Pingot, and Magdalena Maciejewska. "METAL COMPLEXES AS NEW PRO-ECOLOGICAL CROSSLINKING AGENTS FOR CHLOROPRENE RUBBER BASED ON HECK COUPLING REACTION." Rubber Chemistry and Technology 92, no. 3 (July 1, 2019): 589–97. http://dx.doi.org/10.5254/rct.19.81465.

Full text
Abstract:
ABSTRACT The influence of new pro-ecological curing agents on the crosslinking process of chloroprene rubber (CR) was examined. The proposed curing system used a simpler recipe (no need to apply harmful products such as zinc oxide and ethylene thiourea) and cost less than standard metal oxides. It was expected that the mechanism of crosslinking would be similar to that of Heck-type reactions. Heck-type reactions are powerful tools for the creation of new C=C bonds. They provide the simplest and most efficient way to synthesize a variety of important compounds used in many areas, such as pharmaceuticals, antioxidants, ultraviolet absorbers, and industrial applications. However, despite their wide application, Heck-type reactions have not been used in the rubber industry so far. Rubber blends containing acetylacetonates with different transition metals as new crosslinking agents were filled with fumed silica Aerosil 380 or carbon black Corax N-550. It was found that metal complexes are active crosslinking agents of the CR composites. The obtained vulcanizates were characterized by a high degree of crosslinking and good mechanical properties. Considering the high tensile strength and degree of crosslinking, iron acetylacetonate was the most effective curing agent of the used metal complexes. Compared with the reference sample cured with metal oxides, the CR samples crosslinked using metal acetylacetonates had a higher activity.
APA, Harvard, Vancouver, ISO, and other styles
35

Kremer, Marius, and Ulli Englert. "N Donor substituted acetylacetones – versatile ditopic ligands." Zeitschrift für Kristallographie - Crystalline Materials 233, no. 7 (July 26, 2018): 437–52. http://dx.doi.org/10.1515/zkri-2017-2131.

Full text
Abstract:
Abstract Acetylacetone (2,4-pentanedione) derivatives with N donor substituents represent ditopic ligands with coordination sites of distinctly different Pearson hardness. Deprotonation of the acetylacetone (Hacac) moiety leads to O,O′ chelating monoanionic (acac) ligands suitable for coordination to hard cations. The softer N donor site(s) preferably act as nucleophiles towards softer partners. When the organic molecules are employed as linkers and coordinate via either site, they are often selective and allow to synthesize well-ordered heterometallic solids. This review addresses the derivatives of 17 pentanediones with nitrile, pyridyl and pyrazolyl moieties as N donor substituents, with an emphasis on structurally characterized compounds. Depending on the N donor substituents and the cations, O,O′ or N coordination will dominate. The nitrile-substituted compounds essentially behave as acetylacetones; they may easily O,O′ coordinate to a wide range of cations whereas N coordination is limited to AgI, CuI or, in the case of less soft cations, to longer and presumably weaker contacts, e.g. to the more distant sites in Jahn–Teller distorted CuII. In contrast, pyridyl-substituted pentanediones act as N donor ligands, regardless whether their (H)acac site is chelating a cation or not. The still scarcely explored pyrazolyl derivative shows the most complex coordination pattern: it may be deprotonated both at the acetylacetone and the pyrazol site, the latter affording N,N′ bridging ligands. In addition to N donor nucleophilicity, the distance between the alternative coordination sites and their mutual orientation are relevant for crystal engineering applications.
APA, Harvard, Vancouver, ISO, and other styles
36

Dorokhov, V. A., and M. F. Gordeev. "Cyclocondensation of (benzimidazol-2-yl)cyanamide with acetylacetone in the presence of nickel acetylacetonate." Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 36, no. 2 (February 1987): 418. http://dx.doi.org/10.1007/bf00959402.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Dorokhov, V. A., M. F. Gordeev, and V. S. Bogdanov. "Reaction of acetylacetone with cyanamide in the presence of catalytic amounts of nickel acetylacetonate." Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 37, no. 6 (June 1988): 1265–67. http://dx.doi.org/10.1007/bf00961953.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Granifo, Juan, Rubén Gaviño, Sebastián Suárez, and Ricardo Baggio. "Structural characterization of a hybrid terpyridine–pyrazine ligand and its one-dimensional ZnII coordination polymer: a computational approach to conventional and nonconventional intermolecular interactions." Acta Crystallographica Section C Structural Chemistry 75, no. 9 (August 20, 2019): 1299–309. http://dx.doi.org/10.1107/s2053229619011161.

Full text
Abstract:
The structures of a new hybrid terpyridine–pyrazine ligand, namely 4′-[4-(pyrazin-2-yl)phenyl]-4,2′:6′,4′′-terpyridine (L2), C25H17N5, and its one-dimensional coordination polymer catena-poly[[bis(acetylacetonato-κ2 O,O′)zinc]-μ-4′-[4-(pyrazin-2-yl-κN 4)phenyl]-4,2′:6′,4′′-terpyridine-κN 1], [Zn(C5H7O2)2(C25H17N5)] n or [Zn(acac)2(L2)] n (Hacac is acetylacetone), are reported. Packing interactions in both crystal structures are analyzed using Hirshfeld surface and enrichment ratio techniques. For the simpler structure of the monomeric ligand, further studies on the interaction hierarchy using the energy framework approach were made. The result was a complete picture of the intermolecular interaction landscape, which revealed some subtle details, for example, that some weak (at first sight negligible) C—H...N interactions in the structure of free L2 play a relevant role in the crystal stabilization.
APA, Harvard, Vancouver, ISO, and other styles
39

Dallmann, K., and W. Preetz. "Darstellung, Kristallstruktur, Schwingungsspektren und Normalkoordinatenanalyse von [Os(acac)3]/ Synthesis, Crystal Structure, Vibrational Spectra, and Normal Coordinate Analysis of [Os(acac)3]." Zeitschrift für Naturforschung B 53, no. 2 (February 1, 1998): 232–38. http://dx.doi.org/10.1515/znb-1998-0216.

Full text
Abstract:
Abstract In the reaction of K2[OsCl6] with boiling water/acetylacetone (1:1) a mixture of different chloro-acetylacetonato complexes is formed, from which [Os(acac)3] can be isolated by column chromatography with dichloromethane on silica gel. The crystal structure of [Os(acac)3] (mo­noclinic, space group P21/c,a = 13.968(5), b = 7.517(5), c = 16.455(5) Å ,β = 98.939(5)°, Z = 4) has been determined by single crystal X-ray diffraction analysis. High resolution IR and Raman spectra were measured at low temperature (10K). Based on the molecular parameters of the X-ray structure determination a normal coordinate analysis has been performed and the normal modes of vibration have been assigned. With a set of 32 force constants, taking into account the intraligand vibrations, a good agreement between observed and calculated frequencies has been achieved. The valence force constants are fd(OsO) = 3.19 and fd(OC) = 6.74 mdyn/Å.
APA, Harvard, Vancouver, ISO, and other styles
40

Kim, Jung-Sung, Seong-Yun Kim, Yoon-Yul Park, Hiroshi Tomiyasu, and Yasuhisa Ikeda. "A kinetic study on substitution reactions of tridentate ligands for acetylacetonate in bis(acetylacetonato)(tetrahydrofuran)dioxouranium(VI)." Inorganica Chimica Acta 304, no. 2 (June 2000): 199–203. http://dx.doi.org/10.1016/s0020-1693(00)00088-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Nagasawa, Akira, Hiroaki Kido, Tomoko M. Hattori, and Kazuo Saito. "Ligand isotopic exchange kinetics of tris(acetylacetonato)aluminum(III) in acetylacetone under atmospheric and elevated pressures." Inorganic Chemistry 25, no. 24 (November 1986): 4330–33. http://dx.doi.org/10.1021/ic00244a009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Tursiloadi, S., H. Imai, and H. Hirashima. "Chemical Modification of Alkoxide Precursors for Lead Zirconate Titanate Formation." Australian Journal of Chemistry 49, no. 5 (1996): 569. http://dx.doi.org/10.1071/ch9960569.

Full text
Abstract:
Lead zirconate titanate (PZT) gel monolith was prepared by partially hydrolysing metal alkoxide solutions which were modified with acetylacetone ( acacH ). Lead diisopropoxide zirconium tetrabutoxide and titanium tetraisopropoxide were used as starting materials. After aging of the translucent monolithic gel at room temperature for several days or drying at 90°C for 18 h, the most significant feature in the infrared spectrum is the presence of bands at about 1550 cm-1 which can be assigned to the v(C-O) and v(C-C) vibrations of the acetylacetonate group coordinated to the metal cations of titanium and zirconium. Diffraction peaks of PbO were found after heating at 300°C for 2 h. After heating at 450°C for 2 h, diffraction peaks of pyrochlore Pb2Ti2O6 and perovskite PZT phases were observed. The diffraction peaks of PbO and the pyrochlore phase disappeared after heating at 600°C, and the tetragonal perovskite phase was stable up to 1000°C. Diffraction peaks of the perovskite phase were also found after heating at 430°C for 24 h.
APA, Harvard, Vancouver, ISO, and other styles
43

Udagawa, Yoshiko, Hiroshi Tomiyasu, Woo-Sik Jung, Tae Yoon Eom, and Hiroshi Fukutomi. "Kinetics and Mechanism of the Substitution of β-Diketonates for Acetylacetonate in Bis(acetylacetonato)(trimethyl phosphate)dioxouranium(VI)." Bulletin of the Chemical Society of Japan 62, no. 9 (September 1989): 2802–6. http://dx.doi.org/10.1246/bcsj.62.2802.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Suzuki, A., and K. Maki. "Transparent Conductive Thin Films of Sn Doped In2O3 Grown by Aerosol-Assisted CVD Using InIII Acetylacetonate with 5 mol % SnIV Bis-acetylacetonate Dibromide Dissolved in Acetylacetone." Chemical Vapor Deposition 12, no. 10 (October 2006): 608–13. http://dx.doi.org/10.1002/cvde.200506379.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Man, D., I. Mrówka, A. Wójcik, and B. Pytel. "Impact of Vanadium(IV)-Oxy Acetylacetonate and Vanadium(III) Acetylacetonatel on the DPPC Liposome Membranes: EPR Studies." Acta Physica Polonica A 132, no. 1 (July 2017): 52–56. http://dx.doi.org/10.12693/aphyspola.132.52.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

McNeill, I. C., and J. J. Liggat. "The effect of metal acetylacetonates on the thermal degradation of poly(methyl methacrylate)—I. Cobalt (III) acetylacetonate." Polymer Degradation and Stability 29, no. 1 (January 1990): 93–108. http://dx.doi.org/10.1016/0141-3910(90)90024-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Herr, T., J. Noack, P. Fischer, and J. Tübke. "1,3-Dioxolane, tetrahydrofuran, acetylacetone and dimethyl sulfoxide as solvents for non-aqueous vanadium acetylacetonate redox-flow-batteries." Electrochimica Acta 113 (December 2013): 127–33. http://dx.doi.org/10.1016/j.electacta.2013.09.055.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Radlik, Monika, Wojciech Juszczyk, Krzysztof Matus, Wioletta Raróg-Pilecka, and Zbigniew Karpiński. "Hydrodechlorination of CHClF2 (HCFC-22) over Pd–Pt Catalysts Supported on Thermally Modified Activated Carbon." Catalysts 10, no. 11 (November 8, 2020): 1291. http://dx.doi.org/10.3390/catal10111291.

Full text
Abstract:
Commercial activated carbon, pretreated in helium at 1600 °C and largely free of micropores, was used as a support for two series of 2 wt.% Pd–Pt catalysts, prepared by impregnating the support with metal acetylacetonates or metal chlorides. The catalysts were characterized by temperature-programmed methods, H2 chemisorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning transmission electron microscopy (STEM) with energy dispersive spectroscopy (EDS). Overall, the results confirmed the existence of well-dispersed Pd–Pt nanoparticles in the bimetallic catalysts, ranging in size from 2 to 3 nm. The catalysts were investigated in the gas phase hydrodechlorination of chlorodifluoromethane (HCFC-22). In this environmentally relevant reaction, both the ex-chloride and ex-acetylacetonate Pd–Pt/C catalysts exhibited better hydrodechlorination activity than the monometallic catalysts, which is consistent with the previous results of hydrodechlorination for other chlorine-containing compounds. This synergistic effect can be attributed to the electron charge transfer from platinum to palladium. In general, product selectivity changes regularly with Pd–Pt alloy composition, from high in CH2F2 for Pd/C (70–80%) to the selective formation of CH4 for Pt/C (60–70%).
APA, Harvard, Vancouver, ISO, and other styles
49

Brink, Alice, Andreas Roodt, and Hendrik G. Visser. "(Acetylacetonato-κ2 O,O′)carbonyl(cyclohexyldiphenylphosphine-κP)rhodium(I)." Acta Crystallographica Section E Structure Reports Online 63, no. 11 (October 26, 2007): m2831—m2832. http://dx.doi.org/10.1107/s1600536807052427.

Full text
Abstract:
The title compound, [Rh(C5H7O2)(C18H21P)(CO)], has the acetylacetonate-chelated RhI atom in a square-planar geometry. Intramolecular C—H...O hydrogen bonds exist between the acetylacetonate group and the cyclohexyl ring, resulting in a buckling of the acetylacetonate skeleton. Molecules are packed in positions of least steric hindrance, with the phosphine ligands positioned above and below the Rh–acetylacetonate backbone.
APA, Harvard, Vancouver, ISO, and other styles
50

Krýsová, Hana, Josef Krýsa, and Ladislav Kavan. "Semi-automatic spray pyrolysis deposition of thin, transparent, titania films as blocking layers for dye-sensitized and perovskite solar cells." Beilstein Journal of Nanotechnology 9 (April 10, 2018): 1135–45. http://dx.doi.org/10.3762/bjnano.9.105.

Full text
Abstract:
For proper function of the negative electrode of dye-sensitized and perovskite solar cells, the deposition of a nonporous blocking film is required on the surface of F-doped SnO2 (FTO) glass substrates. Such a blocking film can minimise undesirable parasitic processes, for example, the back reaction of photoinjected electrons with the oxidized form of the redox mediator or with the hole-transporting medium can be avoided. In the present work, thin, transparent, blocking TiO2 films are prepared by semi-automatic spray pyrolysis of precursors consisting of titanium diisopropoxide bis(acetylacetonate) as the main component. The variation in the layer thickness of the sprayed films is achieved by varying the number of spray cycles. The parameters investigated in this work were deposition temperature (150, 300 and 450 °C), number of spray cycles (20–200), precursor composition (with/without deliberately added acetylacetone), concentration (0.05 and 0.2 M) and subsequent post-calcination at 500 °C. The photo-electrochemical properties were evaluated in aqueous electrolyte solution under UV irradiation. The blocking properties were tested by cyclic voltammetry with a model redox probe with a simple one-electron-transfer reaction. Semi-automatic spraying resulted in the formation of transparent, homogeneous, TiO2 films, and the technique allows for easy upscaling to large electrode areas. The deposition temperature of 450 °C was necessary for the fabrication of highly photoactive TiO2 films. The blocking properties of the as-deposited TiO2 films (at 450 °C) were impaired by post-calcination at 500 °C, but this problem could be addressed by increasing the number of spray cycles. The modification of the precursor by adding acetylacetone resulted in the fabrication of TiO2 films exhibiting perfect blocking properties that were not influenced by post-calcination. These results will surely find use in the fabrication of large-scale dye-sensitized and perovskite solar cells.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Acetylacetonat' for other source types:
Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography