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

Journal articles on the topic 'Nickel diimine complex'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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

Select a source type:

Consult the top 43 journal articles for your research on the topic 'Nickel diimine complex.'

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

Xiao, An Guo, Shi Biao Zhou, Qing Yun Zheng, You Ming Shen, and Yong Bin Zhuan. "Study the Influences of ZnEt2 on Ethylene Chain Transfer Polymerization." Advanced Materials Research 602-604 (December 2012): 672–75. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.672.

Full text
Abstract:
The influences of ZnEt2 on ethylene chain transfer polymerization were investigated in detail and the polymerization mechanism was thoroughly analyzed. The results indicated that ZnEt2 contributed greatly to increase the activity of α-diimine nickel complex/ZnEt2/MAO(MAO: methylaluminoxane). It was striking that α-diimine nickel complex/ZnEt2 catalyst system (1/100 mol/mol) exhibited 8.0 ×104g/mol∙h activity, it was possible the formation of the ion pairs of Nickel and Zinc was convenient for ethylene chain propagation, however, the ion pairs were unstable in ethylene polymerization.
APA, Harvard, Vancouver, ISO, and other styles
2

Padilla-Vélez, Omar, Kyle S. O’Connor, Anne M. LaPointe, Samantha N. MacMillan, and Geoffrey W. Coates. "Switchable living nickel(ii) α-diimine catalyst for ethylene polymerisation." Chemical Communications 55, no. 53 (2019): 7607–10. http://dx.doi.org/10.1039/c9cc03154e.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Wang, Qi, and Peng Liu. "Dual bimodal polyethylene prepared by intercalated silicate with nickel diimine complex." Journal of Polymer Science Part A: Polymer Chemistry 43, no. 22 (2005): 5506–11. http://dx.doi.org/10.1002/pola.21030.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Han, Yiqin, and Danfeng Zhang. "Copolymerization of ethylene with polar monomer by α - diimine nickel complex." IOP Conference Series: Materials Science and Engineering 231 (September 2017): 012140. http://dx.doi.org/10.1088/1757-899x/231/1/012140.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Xue, Xinghua, Xuan Yang, Yizhi Xiao, Qixing Zhang, and Haihua Wang. "Ethylene polymerization using nickel α-diimine complex supported on SiO2/MgCl2 bisupport." Polymer 45, no. 9 (April 2004): 2877–82. http://dx.doi.org/10.1016/j.polymer.2004.02.048.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Fassina, Viviane, Carolina Ramminger, Marcus Seferin, Raquel S. Mauler, Roberto F. de Souza, and Adriano L. Monteiro. "3-Benzyl-Nickel-Diimine Complex: Synthesis and Catalytic Properties in Ethylene Polymerization." Macromolecular Rapid Communications 24, no. 11 (July 2003): 667–70. http://dx.doi.org/10.1002/marc.200350009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

de Souza, Caroline G., Roberto F. de Souza, and Katia Bernardo-Gusmão. "Effect of alkylaluminum cocatalyst on ethylene polymerization with nickel-α-diimine complex." Applied Catalysis A: General 325, no. 1 (May 2007): 87–90. http://dx.doi.org/10.1016/j.apcata.2007.03.007.

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

Zhang, Zhigang, Shuying Wang, and Xindian Dong. "Photodynamic activity of a nickel diimine complex and its interaction with DNA." Transition Metal Chemistry 37, no. 4 (March 29, 2012): 379–83. http://dx.doi.org/10.1007/s11243-012-9599-y.

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

Matthews, Morgan, Madison Sendzik, Adrienne Bruggeman, Claire Kearns, Allen G. Oliver, and Dominic C. Babbini. "Synthesis and crystal structure of a disubstituted nickel(II) bis[(dimethylaminophenylimino)ethyl]pyridine chloride complex." Acta Crystallographica Section E Crystallographic Communications 73, no. 8 (July 13, 2017): 1167–71. http://dx.doi.org/10.1107/s2056989017010088.

Full text
Abstract:
The solvated title compound, bis[2,6-bis(1-{[4-(dimethylamino)phenyl]imino-κN}ethyl)pyridine-κN]nickel(II) dichloride–dichloromethane–water (1/2/2), [Ni(C25H29N5)2]Cl2·2CH2Cl2·2H2O, represents a nickel(II) bis(pyridine diimine) complex with electron-donating dimethylaminophenyl substituents. The complex crystallizes as a water/dichloromethane solvate with Z′ = 2, thus the asymmetric unit consists of two NiII complex cations, four chloride anions, four adventitious water and four dichloromethane solvent molecules. Around each octahedrally coordinated NiII cation, one pendant phenyl group on each of the two ligands has an intramolecular π–π interaction with the pyridine ring of the other chelating ligand. In the crystal, pairs of water molecules are hydrogen bonded to pairs of chlorine atoms. The dichloromethane solvent molecules are likewise hydrogen bonded to the chloride anions.
APA, Harvard, Vancouver, ISO, and other styles
10

Simon, Leonardo C., Raquel S. Mauler, and Roberto F. De Souza. "Effect of the alkylaluminum cocatalyst on ethylene polymerization by a nickel-diimine complex." Journal of Polymer Science Part A: Polymer Chemistry 37, no. 24 (December 15, 1999): 4656–63. http://dx.doi.org/10.1002/(sici)1099-0518(19991215)37:24<4656::aid-pola24>3.0.co;2-g.

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

Shen, Lingyi, Yanxia Zhao, Qiong Luo, Qian-Shu Li, Bin Liu, Carl Redshaw, Biao Wu, and Xiao-Juan Yang. "Cyclotrimerization of alkynes catalyzed by a self-supported cyclic tri-nuclear nickel(0) complex with α-diimine ligands." Dalton Transactions 48, no. 14 (2019): 4643–49. http://dx.doi.org/10.1039/c9dt00819e.

Full text
Abstract:
The cyclic tri-nickel(0) complex [{Ni(μ-LMe-2,4)}3] (LMe-2,4 = [(2,4-Me2C6H3)NC(Me)]2) self-supported by the α-diimines catalyzes cyclotrimerization of alkynes to form substituted benzenes.
APA, Harvard, Vancouver, ISO, and other styles
12

Tuskaev, Vladislav A., Svetlana C. Gagieva, Dmitrii A. Kurmaev, Tamara M. Zvukova, Ivan V. Fedyanin, and Boris M. Bulychev. "Synthesis, characterization and ethylene oligomerization behavior of new nickel(II) octofluoro-α-diimine complex." Inorganica Chimica Acta 442 (March 2016): 167–71. http://dx.doi.org/10.1016/j.ica.2015.12.005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Curtis, Neil F., Joyce M. Waters, and Clifton E. Rickard. "[(1RS,4RS)-5,5,7,13,15,15-Hexamethyl-1,4,8,12-tetraazacyclopentadeca-7,12-diene-N1,N4,N8,N12]nickel(II) diperchlorate." Acta Crystallographica Section E Structure Reports Online 57, no. 1 (December 22, 2000): m48—m50. http://dx.doi.org/10.1107/s1600536800020559.

Full text
Abstract:
The title compound, [Ni(C17H34N4)](ClO4)2, has singlet ground-state nickel(II) complex cations in tetrahedrally twisted square-planar coordination by the four N atoms of the 15-membered diamine diimine tetraazamacrocycle and disordered perchlorate anions, linked into molecular clusters by N—H...O hydrogen bonds and weak Ni...O interactions. The cation has approximate twofold symmetry, with bond lengths Ni—Namineof 1.920 (2) and 1.924 (2) Å, and Ni—Nimineof 1.915 (2) and 1.929 (2) Å, andtrans–N—Ni—N angles of 165.1 (1) and 163.4 (1)°, with the shortest Ni...O distance being 3.27 (3) Å.
APA, Harvard, Vancouver, ISO, and other styles
14

Jiang, Hongliu, Qing Wu, Fangming Zhu, and Haihua Wang. "Preparation of highly branched polyethylene using (α-diimine) nickel complex covalently supported on modified SiO2." Journal of Applied Polymer Science 103, no. 3 (2006): 1483–89. http://dx.doi.org/10.1002/app.24972.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Jiang, Hongliu, Jinshan Lu, and Fajun Wang. "Polymerization of ethylene using a nickel α-diimine complex covalently supported on SiO2–MgCl2 bisupport." Polymer Bulletin 65, no. 8 (January 21, 2010): 767–77. http://dx.doi.org/10.1007/s00289-010-0244-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Huo, Ping, Jingbo Li, Wanyun Liu, Guangquan Mei, and Xiaohui He. "A highly active and thermally stable 6,13-dihydro-6,13-ethanopentacene-15,16-diimine nickel(ii) complex as catalyst for norbornene polymerization." RSC Advances 7, no. 82 (2017): 51858–63. http://dx.doi.org/10.1039/c7ra10921k.

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

Zhu, Liang, Dandan Zang, Yi Wang, Yintian Guo, Baiyu Jiang, Feng He, Zhisheng Fu, et al. "Insight into the Mechanism of Thermal Stability of α-Diimine Nickel Complex in Catalyzing Ethylene Polymerization." Organometallics 36, no. 6 (March 16, 2017): 1196–203. http://dx.doi.org/10.1021/acs.organomet.7b00066.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Curtis, Neil F., and Sarah R. Osvath. "Kinetics of acid-promoted dissociation of diamine-diimine macrocycle complex cations with nickel(II) and copper(II)." Inorganic Chemistry 27, no. 2 (January 1988): 305–10. http://dx.doi.org/10.1021/ic00275a016.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Ghasemi Hamedani, Nona, and Hassan Arabi. "A systematic study of Nickel (II) α-diimine complex performance on ethylene polymerization: influence of cocatalyst nature." Polymer Bulletin 72, no. 10 (June 11, 2015): 2471–88. http://dx.doi.org/10.1007/s00289-015-1412-6.

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

Curtis, NF. "5-Coordinate Compounds of Nickel(II) and Copper(II) With the Triamine Diimine Ligands 13-imino-4,4,6,11,11-pentamethyl-3,7,10-Triazatetradec-6-en-1-amine and 4,6,11-Triethyl-13-imino-4,11-dimethyl-3,7,10-triazapentadec-6-en-1-amine." Australian Journal of Chemistry 41, no. 6 (1988): 957. http://dx.doi.org/10.1071/ch9880957.

Full text
Abstract:
Reaction of nickel(II) with 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene diperchlorate in the presence of ammonia yields a lilac- coloured complex of nickel(II) with 13-imino-4,4,6,11,11-pentamethyl-3,7,10-triazatetradec-6-en-1-amine, a pentadentate ligand with one primary and two secondary amino, plus one primary and one secondary imino , donor groups. The copper(II) complex of the ligand was formed from the nickel(II) compound by metal-ion substitution. The cations have d-d spectra indicative of five-coordination. The complex cations undergo a reversible protonation reaction with a change from five-coordinate to square planar, with a colour change for nickel(II) from lilac (triplet ground state) to yellow (singlet ground state), and for copper(II) from blue to violet. The compounds of the homologous ligand 4,6,11-triethyl-13-imino-4,11- dimethyl-3,7,10-triazapentadec-6-en-1-amine were similarly prepared, and have similar properties.
APA, Harvard, Vancouver, ISO, and other styles
21

Zhu, Fangming, Wei Xu, Xinxing Liu, and Shangan Lin. "Synthesis of branched polyethylene by ethylene homopolymerization with a novel (?-diimine)nickel complex in the presence of methylaluminoxane." Journal of Applied Polymer Science 84, no. 6 (February 27, 2002): 1123–32. http://dx.doi.org/10.1002/app.10398.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Retna Raj, C. "Voltammetric measurement of pH using a mixed self-assembly of macrocyclic nickel(II) complex and diimine on gold electrode." Electrochemistry Communications 4, no. 4 (April 2002): 330–35. http://dx.doi.org/10.1016/s1388-2481(02)00303-x.

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

Dorcier, A., N. Merle, M. Taoufik, F. Bayard, C. Lucas, A. de Mallmann, and J. M. Basset. "Preparation of a Well-Defined Silica-Supported Nickel-Diimine Alkyl Complex − Application for the Gas-Phase Polymerization of Ethylene." Organometallics 28, no. 7 (April 13, 2009): 2173–78. http://dx.doi.org/10.1021/om800582x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Ghasemi Hamedani, Nona, Hassan Arabi, and Francis S. Mair. "A low-symmetry nickel(II) α-diimine complex for homopolymerization of ethylene: study of interactive effects of polymerization parameters." Journal of Coordination Chemistry 68, no. 15 (July 8, 2015): 2601–19. http://dx.doi.org/10.1080/00958972.2015.1057130.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Kurokawa, Hideki, Ryota Ogawa, Kazuhiro Yamamoto, Tsutomu Sakuragi, Masa-aki Ohshima, and Hiroshi Miura. "Nickel(II) Complex Bearing Fluorine-substituted α-Diimine Ligand Immobilized in Fluorotetrasilicic Mica Interlayer as Heterogeneous Catalysts for Ethylene Oligomerization." Journal of the Japan Petroleum Institute 57, no. 3 (2014): 146–54. http://dx.doi.org/10.1627/jpi.57.146.

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

Manteghi, Amin, Hassan Arabi, and Ali Farhadi. "Ethylene polymerization to branched thermoplastic elastomers through proper activation of heterogeneous nickel (II) α-diimine complex and thermal drawing process." Polymer 179 (September 2019): 121660. http://dx.doi.org/10.1016/j.polymer.2019.121660.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Li, Ting, Chuan Hui Zhang, Fang Ming Zhu, and Qing Wu. "Unsymmetrical α-diimine nickel (II) complex with rigid bicyclic ring ligand: Synthesis, characterization, and ethylene polymerization in the presence of AlEt2Cl." Journal of Applied Polymer Science 108, no. 1 (2008): 206–10. http://dx.doi.org/10.1002/app.27499.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Craig, DC, HA Goodwin, D. Onggo, and AD Rae. "Coordination of 2,2'-Bithiazole. Spectral, Magnetic and Structural Studies of the Iron(II) and Nickel(II) Complexes." Australian Journal of Chemistry 41, no. 11 (1988): 1625. http://dx.doi.org/10.1071/ch9881625.

Full text
Abstract:
Iron(II) and nickel(II) complexes of 2,2′bithiazole (2bt) have been prepared. Salts of [Fe(2bt)3]2+ have spectral properties typical of iron(II) diimine systems. Their magnetic and Mossbauer spectral properties show an anomalous temperature-dependence which is associated with a temperature-induced singlet (1A1) ↔ quintet (5T2) transition. The manifestation of the spin transition is complicated by the existence of two modifications of the complex perchlorate. In one of these there is a relatively small fraction of quintet state species in an essentially low-spin lattice. This fraction increases only slightly at elevated temperatures within the range 89-343 K. The other modification is essentially high-spin at high temperatures and low-spin at low temperatures. The quadrupole splitting values for the two high-spin species are quite different, arising from different lattice contributions. The structures of 2bt and the related 4,4′-bithiazole and of [Ni(2bt)3][ClO4]2 have been determined by single-crystal X-ray diffactometry. These afford a comparison of the coordination features of the isomeric bithiazoles. 2,2′-Bithiazole, orthorhombic with space group P bca , Z = 8, α 9.284(1), b 14.564(1), c 10.802(1) Ǻ; 4,4′-Bithiazole, monoclinic with space group P21/c, Z = 2, a 5.528(2), b 6.288(2), c 11.316(4)Ǻ. The nickel complex, orthorhombic with non-centrosymmetric space group Pna21, four molecules per unit cell, a 16.709(3), b 9.511(4), c 17.491(2)Ǻ, has a stacking fault which reduces the intensity of h = 2n+1 data. Pseudosymmetry enables data with h = 2n to be described by a disordered structure in the centrosymmetric space group Pnmn.
APA, Harvard, Vancouver, ISO, and other styles
29

Arabi, H., M. S. Beheshti, M. Yousefi, N. Ghasemi Hamedani, and M. Ghafelebashi. "Study of triisobutylaluminum as cocatalyst and processing parameters on ethylene polymerization performance of α-diimine nickel(II) complex by response surface method." Polymer Bulletin 70, no. 10 (June 19, 2013): 2765–81. http://dx.doi.org/10.1007/s00289-013-0986-0.

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

He, Feng, Dan Wang, Baiyu Jiang, Zhen Zhang, Zhenmei Cheng, Zhisheng Fu, Qisheng Zhang, and Zhiqiang Fan. "Introducing electron-donating substituents on ligand backbone of α-diimine nickel complex and the effects on catalyst thermal stability in ethylene polymerization." Inorganica Chimica Acta 486 (February 2019): 704–10. http://dx.doi.org/10.1016/j.ica.2018.08.048.

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

Jiang, Hongliu, Fuan He, and Haihua Wang. "A new strategy to prepare branching polyethylene by using an α-diimine nickel (II) complex covalently supported on MgCl2/AlRn(OEt)3-n." Journal of Polymer Research 16, no. 2 (July 11, 2008): 183–89. http://dx.doi.org/10.1007/s10965-008-9216-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Elhusseiny, Amel F., Hend M. Hussien, and Hammed H. A. M. Hassan. "An Initial Demonstration of Polyester Monomer Coordination Properties: Synthesis and Biological Activity of Metal Complexes Derived from a New Nanosized Diol." Letters in Organic Chemistry 16, no. 3 (February 11, 2019): 235–44. http://dx.doi.org/10.2174/1570178615666181009115435.

Full text
Abstract:
A part of a running research project directed to building coordinated polymers based on the rigid aromatic s-triazine, the researchers reported the synthesis, characterization, antimicrobial, antioxidant and anti-inflammatory activities of four new transition metal complexes derived from the nanosized diol monomer (H2L ligand) as early representatives of its nanosized o-naphthol-based polyester. The reaction of the new nanosized N2O2 donor diimine containing sulfone with zinc (II), copper (II), nickel (II) and cobalt (II) ions offered nonconducting metal complexes. The SEM image showed the diol monomer was organized as well-defined nanosized rod-like morphology. Spectroscopic and magnetic susceptibility studies displayed the tetrahedral geometries for Zn (II), Co (II) and Ni (II) complexes while the Cu (II) complex had square planar geometry. The antioxidant and antiinflammatory activities were in the order [Cu2L2].4H2O > [Zn2L2] > [Ni (HL)2] > [Co2L2] > H2L. Despite the ligand, [Cu2L2].4H2O, [Zn2L2] and [Co2L2] complexes displayed no efficacy against the screened microbes, only the tetrahedral Ni (II) complex exhibited moderate activity. The reporting complexes possessed several notable advantages that render them as promising alternatives for the development of therapeutic agents. Selection of the rigid O-substituted naphthol ring as a source of Odonor ligands is expected to construct high dimensional frameworks and more easily contributing and controlling metallic topology.
APA, Harvard, Vancouver, ISO, and other styles
33

Miyamura, Kazuo, Masahiko Saburi, Yohichi Gohshi, Sei Tsuboyama, and Toshio Sakurai. "SYNTHESIS OF OPTICALLY ACTIVE DIAMINO-DIIMINE MACROCYCLE (6S,15S)-1,5,10,14-TETRAAZA-4,13-DIMETHYL-TRICYCLO[13.3.1.16,10]ICOSA-4,13-DIENE AND MOLECULAR STRUCTURE OF ITS NICKEL(II) COMPLEX." Chemistry Letters 15, no. 6 (June 5, 1986): 939–42. http://dx.doi.org/10.1246/cl.1986.939.

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

Abu-Surrah, Adnan S., Mika Kettunen, Kristian Lappalainen, Ulla Piironen, Martti Klinga, and Markku Leskelä. "Synthesis of new chiral diimine palladium(II) and nickel(II) complexes bearing oxazoline- and myrtanyl-based nitrogen ligands. Crystal structure of the C2-symmetric complex [{(1R,2S)-inda-box}PdCl2]." Polyhedron 21, no. 1 (January 2002): 27–31. http://dx.doi.org/10.1016/s0277-5387(01)00952-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Mitsopoulou, Christiana A., and Constantinos Dagas. "Synthesis, Characterization, DNA Binding, and Photocleavage Activity of Oxorhenium (V) Complexes withα-Diimine and Quinoxaline Ligands." Bioinorganic Chemistry and Applications 2010 (2010): 1–9. http://dx.doi.org/10.1155/2010/973742.

Full text
Abstract:
The complex [ReOCl3pq] (1) (where pq = 2-(2′pyridyl)quinoxaline) has been synthesized and fully characterized by UV-Vis, FTIR, 1 and 2D NMR, and cyclic voltammetry (CV). The DNA-binding properties of the complex1as well as of the compounds [ReOCl3bpy] (2), [ReOCl3phen] (3), and pq (4) were investigated by UV-spectrophotometric (melting curves), CV (cyclic voltammetry), and viscosity measurements. Experimental data suggest that complex1intercalates into the DNA base pairs. Upon irradiation, complex1was found to promote the cleavage of plasmid pBR 322 DNA from supercoiled form I to nicked form II. The mechanism of the DNA cleavage by complex1was also investigated.
APA, Harvard, Vancouver, ISO, and other styles
36

Tabatabaeian, Khalil, Mohammad Ali Zanjanchi, Nosrat O. Mahmoodi, Tooraj Eftekhari, and Seyed Mohammad Shafiei. "Diimino Nickel Complex Anchored into the MOF Cavity as Catalyst for Epoxidation of Chalcones and Bischalcones." Journal of Cluster Science 28, no. 3 (October 3, 2016): 949–62. http://dx.doi.org/10.1007/s10876-016-1079-7.

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

Bonamico, Mario, Vincenzo Fares, Alberto Flamini, and Nicola Poli. "Metal complexes of the new ligand 1,2,6,7-tetracyano-3,5-diimino-3,5-dihydropyrrolizinide, M(II)(C11N7H2)2, as basic units for molecular materials. Electrochemical and metal-phthalocyanine-like electronic properties of the nickel(II) complex and x-ray crystal structures of its adducts with dioxane and tetrathiafulvalene." Inorganic Chemistry 30, no. 15 (July 1991): 3081–87. http://dx.doi.org/10.1021/ic00015a027.

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

Jiang, Hongliu, and Jinshan Lu. "Ethylene polymerization with an alpha-diimine nickel (II) complex covalently supported on SiO2." e-Polymers 13, no. 1 (December 1, 2013). http://dx.doi.org/10.1515/epoly-2013-0132.

Full text
Abstract:
Abstract A new strategy has been developed to prepare silica-supported α- diimine nickel (II) complex for ethylene polymerization. The bis(4-allyl-2,6- diisopropylphenyl-imino)acenaphthene was modified by the introduction of reactive Si-Cl end groups, allowing the immobilization of them via the direct reaction of the Si-Cl groups with hydroxyls on the silica surface. The resultant Si-Cl-modified bis(4-allyl-2,6-diisopropylphenyl-imino)acenaphthene ligand and the SiO2 supported ligand were characterized by NMR and FTIR spectroscopic techniques, respectively. The reaction of the supported ligand with (1,2-dimethoxyethane)NiBr2 ((DME)NiBr2) gives rise to silica-supported Ni(II) precatalyst, which exhibits high catalytic activities for ethylene polymerization in the presence of inexpensive general alkylaluminum compounds. According to high-temperature GPC, the polyethylene had average molecular weights in the range 0.246x106---1.217x106 and molecular weight distributions in the range 3.17-3.51. The resultant polyethylenes were confirmed by 13C-NMR to contain significant amounts not only of methyl but also of ethyl, propyl, butyl, amyl, and longer side chains (longer than six carbons).
APA, Harvard, Vancouver, ISO, and other styles
39

Jiang, Hongliu, Jinshan Lu, and Jianhua Xiao. "Polymerization of ethylene using a nickel α-diimine complex covalently supported SiO2-MgCl2 bisupport." e-Polymers 11, no. 1 (December 1, 2011). http://dx.doi.org/10.1515/epoly.2011.11.1.454.

Full text
Abstract:
AbstractBisupported catalyst for ethylene polymerization was prepared by mixing alcohol solution of MgCl2 with pretreated SiO2 in heptane, the prepared bisupport was modified by treatment with alkyl aluminum compounds, and further treatment with bis(4-(4-amine-3,5-diisopropylbenzyl)-2,6-diisopropylphenylimino) acenaphthene NiBr2 (abbreviaed as NiLBr2) solution. The most significant feature of the supported catalyst is that it polymerizes ethylene with high activities in the presence of inexpensive general alkylaluminum compounds. According to the results of high temperature GPC, the number-average molecular weights of the polymers ranged from 2.15×105 to 9.27×105 and the polydispersities ranged from 3.12 to 4.23. By modulating the polymerization temperatures, the products of different and good morphologies were obtained. The resultant PE was confirmed by 13C NMR to contain significant amounts of not only methyl but also ethyl, propyl, butyl,amyl, and long branches (longer than six carbons).
APA, Harvard, Vancouver, ISO, and other styles
40

CURTIS, N. F., and S. R. OSVATH. "ChemInform Abstract: Kinetics of Acid-Promoted Dissociation of Diamine-Diimine Macrocycle Complex Cations (I)-(III) with Nickel(II) and Copper(II)." ChemInform 19, no. 19 (May 10, 1988). http://dx.doi.org/10.1002/chin.198819277.

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

Vicente, Isabel, Katia Bernardo-Gusmão, Michèle O. de Souza, and Roberto F. de Souza. "Friedel-Crafts Alkylation of Toluene as a Parallel Reaction in Propylene Dimerization Catalyzed by Nickel β-Diimine Complex/EASC in Homogeneous Phase." Journal of the Brazilian Chemical Society, 2014. http://dx.doi.org/10.5935/0103-5053.20140225.

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

MIYAMURA, K., M. SABURI, Y. GOHSHI, S. TSUBOYAMA, and T. SAKURAI. "ChemInform Abstract: Synthesis of Optically Active Diamino-diimine Macrocycle(6S,15S)-1,5,10,14-tetraaza-4,13-dimethyl-tricyclo[13.3.1.16,10]icosa-4,13-diene and Molecular structure of Its Nickel(II) Complex." Chemischer Informationsdienst 17, no. 50 (December 16, 1986). http://dx.doi.org/10.1002/chin.198650271.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Matos, Inês, Auguste Fernandes, Rita Catalão, Ana M. Botelho do Rego, José R. Ascenso, Isabel F. Fonseca, Francisco Lemos, and Maria M. Marques. "Heterogeneization of alpha diimines nickel catalysts for the polymerization of ethylene and methylmethacrylate." e-Polymers 10, no. 1 (December 1, 2010). http://dx.doi.org/10.1515/epoly.2010.10.1.1643.

Full text
Abstract:
AbstractIn this paper we present two different techniques for the preparation of single site heterogeneous catalyst. The first method consists in the impregnation of a solution of the organometallic compound in MCM41. The second method intends to establish the in situ synthesis of the complex within the solid’s pores by the reaction of the organic ligand with the metal cation previously introduced in the support. The direct deposition of the organometallic complex in the support resulted in an active catalyst which gives polyethylene with the same microstructure as the one obtained with the related homogeneous systems. The heterogeneous catalysts obtained by reaction of the ligand with the metal already present in the support showed a lower catalytic activity.
APA, Harvard, Vancouver, ISO, and other styles
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