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Journal articles on the topic 'Fluorinated alkoxide'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Ogura, Yusuke, Takaya Terashima, and Mitsuo Sawamoto. "Synthesis of fluorinated gradient copolymers via in situ transesterification with fluoroalcohols in tandem living radical polymerization." Polymer Chemistry 8, no. 15 (2017): 2299–308. http://dx.doi.org/10.1039/c7py00073a.

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Fluorinated gradient copolymers were synthesized by the tandem catalysis of ruthenium-catalyzed living radical polymerization and titanium alkoxide-mediated transesterification of methyl methacrylate (MMA) with fluoroalcohols.

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2

Cantalupo, Stefanie A., June S. Lum, Marisa C. Buzzeo, et al. "Three-coordinate late transition metal fluorinated alkoxide complexes." Dalton Trans. 39, no. 2 (2010): 374–83. http://dx.doi.org/10.1039/b911758j.

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3

Bonsu, Richard O., Hankook Kim, Christopher O'Donohue, et al. "Partially fluorinated oxo-alkoxide tungsten(vi) complexes as precursors for deposition of WOx nanomaterials." Dalton Trans. 43, no. 24 (2014): 9226–33. http://dx.doi.org/10.1039/c4dt00407h.

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4

Lum, June S., Peter E. Chen, Arnold L. Rheingold, and Linda H. Doerrer. "Zinc(II) complexes with fluorinated monodentate aryloxide and alkoxide ligands." Polyhedron 58 (July 2013): 218–28. http://dx.doi.org/10.1016/j.poly.2013.03.014.

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5

Zheng, BingNa, Maria O. Miranda, Antonio G. DiPasquale, James A. Golen, Arnold L. Rheingold, and Linda H. Doerrer. "Synthesis and Electronic Spectra of Fluorinated Aryloxide and Alkoxide [NiX4]2−Anions." Inorganic Chemistry 48, no. 10 (2009): 4274–76. http://dx.doi.org/10.1021/ic9003593.

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6

Lum, June S., Laleh Tahsini, James A. Golen, Curtis Moore, Arnold L. Rheingold, and Linda H. Doerrer. "K⋅⋅⋅F/O Interactions Bridge Copper(I) Fluorinated Alkoxide Complexes and Facilitate Dioxygen Activation." Chemistry - A European Journal 19, no. 20 (2013): 6374–84. http://dx.doi.org/10.1002/chem.201204275.

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7

Rivero, Pedro, Juan Maeztu, Calos Berlanga, Adrian Miguel, José Palacio, and Rafael Rodriguez. "Hydrophobic and Corrosion Behavior of Sol-Gel Hybrid Coatings Based on the Combination of TiO2 NPs and Fluorinated Chains for Aluminum Alloys Protection." Metals 8, no. 12 (2018): 1076. http://dx.doi.org/10.3390/met8121076.

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In this work, layers of a sol-gel hybrid matrix doped with metal oxide nanoparticles (TiO2 NPs) have been deposited on flat samples of AA6061-T6 aluminum alloy using the dip-coating technique, with the aim of obtaining coatings with better anti-corrosive and hydrophobic properties. Two different organic modified silica alkoxides, namely 3-(glycidyloxypropyl)trimethoxysilane (GPTMS) and methyltriethoxysilane (MTEOS), have been used for an adequate entrapment of the metal oxide nanoparticles. In addition, a fluorinated metal-alkoxide precursor has also been added to the hybrid matrix in order to improve the hydrophobic behavior. The experimental results corroborate that the presence of these TiO2 NPs play an important role in the development of the sol-gel hybrid coatings. The water contact angle (WCA) measurements, as well as pencil hardness tests indicate that TiO2 NPs make a considerable increase in the resultant hydrophobicity possible, with better mechanical properties of the coatings. The coating thickness has been measured by cross-section scanning electron microscopy (SEM). In addition, a glow discharge optical emission spectroscopy (GD-OES) analysis has been carried out in order to corroborate the adequate entrapment of the TiO2 NPs into the sol-gel coatings. Finally, potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS) have been performed in order to evaluate the corrosion resistance of the coatings. All the results provide insights into the efficacy of the developed sol-gel hybrid coatings for anticorrosive purposes with good mechanical properties.

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8

Carpentier, Jean-François. "Multidentate fluorinated alkoxide ligand platforms for oxophilic metal centers: from MOCVD source reagents to polymerizationcatalysts." Dalton Trans. 39, no. 1 (2010): 37–48. http://dx.doi.org/10.1039/b915172a.

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9

Oomens, Jos, Giel Berden, and Thomas Hellman Morton. "Negative Hyperconjugation versus Electronegativity: Vibrational Spectra of Free Fluorinated Alkoxide Ions in the Gas Phase." ChemPhysChem 16, no. 9 (2015): 1992–95. http://dx.doi.org/10.1002/cphc.201500177.

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10

Vittal, Jagadese J., and Christopher J. Willis. "Coordination-induced keto–enol tautomerization in the formation of Ni2+ and Cu2+complexes of a fluorinated keto-diol." Canadian Journal of Chemistry 71, no. 7 (1993): 1051–56. http://dx.doi.org/10.1139/v93-140.

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The fluorinated keto-diol (CF3)2C(OH)CH2C(=O)CH2C(CF3)2OH forms stable, neutral, 1:1 complexes of Ni2+ (6a) and Cu2+ (6b) with tetramethylethylenediamine (TMED) as coligand. The structure of each complex has been determined crystallographically; they are isomorphous and isostructural, monoclinic with space group Cc (No. 9). Complex 6a, C15H20F12N2NiO3, has a = 11.495(2), b = 15.516(2), c = 12.323(2) Å, β = 99.88(1)°, V = 2165.4(6) Å3Z = 4. Complex 6b, C15H20CuF12N2O3, has a = 11.603(2) b = 15.661(2), c = 12.276(2) Å, β = 99.75(2)°, V = 2198.5(6) Å Z = 4. In each, the metal is in square-planar geometry bonded to two alkoxide groups and two N atoms of TMED. A previous assignment of a zwitterionic structure to these complexes has been shown to be incorrect. Instead, the ligand is coordinated as the di-ionized enol tautomer (CF3)2C(–O−)CH2C(–O−)=CHC(CF3)2OH, the C=C double bond being external to the six-membered chelate ring. The remaining OH group of the ligand forms part of a second six-membered ring held together by hydrogen bonding.

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11

Crowe, Adam J., Kyle K. Stringham, and Bart M. Bartlett. "Fluorinated Alkoxide-Based Magnesium-Ion Battery Electrolytes that Demonstrate Li-Ion-Battery-Like High Anodic Stability and Solution Conductivity." ACS Applied Materials & Interfaces 8, no. 35 (2016): 23060–65. http://dx.doi.org/10.1021/acsami.6b07262.

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12

Lai, Ying-Hui, Tsung-Yi Chou, Yi-Hwa Song, et al. "Synthesis and Characterization of Ruthenium Complexes with Two Fluorinated Amino Alkoxide Chelates. The Quest To Design Suitable MOCVD Source Reagents." Chemistry of Materials 15, no. 12 (2003): 2454–62. http://dx.doi.org/10.1021/cm030029c.

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13

Molloy, K. C., and P. A. Williams. "Atmospheric pressure chemical vapour deposition of WO3thin films from a volatile fluorinated tungsten oxo-alkoxide precursor, W(O)(OCH2CF3)4." Applied Organometallic Chemistry 22, no. 10 (2008): 560–64. http://dx.doi.org/10.1002/aoc.1439.

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14

Vincent, H., F. Labrize, and L. Hubert. "Crystal structure of a barium fluorinated alkoxide Ba5(OH)(OCH(CF3)2)9(THF)4H2O, for use as precursor for highTCsupraconductors CVD." Acta Crystallographica Section A Foundations of Crystallography 49, s1 (1993): c241—c242. http://dx.doi.org/10.1107/s0108767378093290.

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15

Sohrin, Yoshiki, Shun-ichi Iwamoto, Shoji Akiyama, et al. "Determination of trace elements in seawater by fluorinated metal alkoxide glass-immobilized 8-hydroxyquinoline concentration and high-resolution inductively coupled plasma mass spectrometry detection." Analytica Chimica Acta 363, no. 1 (1998): 11–19. http://dx.doi.org/10.1016/s0003-2670(98)00074-9.

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16

Kajiya, Tasuku, Masato Aihara, and Shizuko Hirata. "Determination of rare earth elements in seawater by inductively coupled plasma mass spectrometry with on-line column pre-concentration using 8-quinolinole-immobilized fluorinated metal alkoxide glass." Spectrochimica Acta Part B: Atomic Spectroscopy 59, no. 4 (2004): 543–50. http://dx.doi.org/10.1016/j.sab.2003.12.019.

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17

Niyogi, Debyani G., Sukhjinder Singh, Anju Saini, and R. D. Verma. "Reactions of fluorinated acid anhydrides with metal alkoxides." Journal of Fluorine Chemistry 66, no. 2 (1994): 153–58. http://dx.doi.org/10.1016/0022-1139(93)03012-b.

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18

Prakash, G. K. Surya, Jinbo Hu, and George A. Olah. "Alkylation of in situ generated fluorinated alkoxides: novel synthesis of partially fluorinated ethers." Arkivoc 2003, no. 3 (2003): 104–19. http://dx.doi.org/10.3998/ark.5550190.0004.311.

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19

Plenio, H., E. Egert, M. Nieger, H. W. Roesky, H. G. Schmidt, and G. M. Sheldrick. "Preparation and structural investigations of fluorinated tungsten(vi) alkoxides." Journal of Fluorine Chemistry 38, no. 2 (1988): 187–204. http://dx.doi.org/10.1016/s0022-1139(00)83028-6.

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20

Andrews, Philip C., Peter C. Junk, Iryna Nuzhnaya, and Leone Spiccia. "Fluorinated bismuth alkoxides: from monomers to polymers and oxo-clusters." Dalton Transactions, no. 19 (2008): 2557. http://dx.doi.org/10.1039/b715623e.

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21

Street, Shane C., and Andrew J. Gellman. "FT-IRAS of Adsorbed Alkoxides: Fluorinated Ethoxides on Cu(111)." Journal of Physical Chemistry 100, no. 20 (1996): 8338–48. http://dx.doi.org/10.1021/jp952103n.

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22

Randhawa, Sukhjinder S., Debyani G. Niyogi, and Rajendar D. Verma. "Reactions of fluorinated acid anhydrides with metal alkoxides and organometallic oxides." Journal of Fluorine Chemistry 54, no. 1-3 (1991): 153. http://dx.doi.org/10.1016/s0022-1139(00)83663-5.

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23

Kotun, Stefan P., John D. O. Anderson, and Darryl D. Des Marteau. "Fluorinated tertiary alcohols and alkoxides from nucleophilic trifluoromethylation of carbonyl compounds." Journal of Organic Chemistry 57, no. 4 (1992): 1124–31. http://dx.doi.org/10.1021/jo00030a018.

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24

Afzal, D., та K. R. Fountain. "Theoretical investigation of experimentally determined α-εffects — The role of electronics". Canadian Journal of Chemistry 89, № 11 (2011): 1343–54. http://dx.doi.org/10.1139/v11-113.

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Recent experimental reports involving both α-nucleophiles and normal nucleophiles have reported both the presence and absence of an α-effect. In ester systems, such as dimethylmethylphosphonate (DMMP), a small α-effect is reported, but the reference point is a stationary point of the potential energy surface that must rearrange to acquire the near attack conformation (NAC) necessary for the Sn2 pathway to proceed. The second type of study involves use of highly fluorinated alkoxides as normal nucleophiles and reports no α-effect. This paper employs linear free energy plots in an investigation of electronic effects in methyl formate SN2 reactions, using high-level computations of transition states for determination of energy barriers.

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25

Mori, Hideharu. "Design and Synthesis of Functional Silsesquioxane-Based Hybrids by Hydrolytic Condensation of Bulky Triethoxysilanes." International Journal of Polymer Science 2012 (2012): 1–17. http://dx.doi.org/10.1155/2012/173624.

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This paper presents a short overview of recent advances in the design and synthesis of organic-inorganic hybrids using silsesquioxane-based nanoparticles having nanometer size, relatively narrow size distribution, high functionalities, and various characteristic features, mainly focusing on our recent researches related to the subject. A highlight of this paper is the water-soluble silsesquioxane-based nanoparticles, including hydroxyl-functionalized and cationic silsesquioxanes, which were synthesized via the one-step condensation of the bulky triethoxysilane precursors. The design and synthesis of R-SiO1.5/SiO2and R-SiO1.5/TiO2hybrids by hydrolytic cocondensation of a triethoxysilane precursor and metal alkoxides are briefly introduced. This paper also deals with recent results in stimuli-responsive hybrids based on the water-soluble silsesquioxane nanoparticles and fluorinated and amphiphilic silsesquioxane hybrids.

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26

Bradley, Donald C., Halina Chudzynska, Mark E. Hammond, Michael B. Hursthouse, Majid Motevalli, and Wu Ruowen. "The preparation and characterization of volatile derivatives of trivalent metals using fluorinated alkoxide ligands. X-ray structures of [Sc{OCH(CF3)2}3(NH3)2]2, [Pr{OCMe(CF3)2}3(NH3)2]2, [Y{OCMe(CF3)2}3(thf)3] and [Pr{OCMe2(CF3}3]3." Polyhedron 11, no. 3 (1992): 375–79. http://dx.doi.org/10.1016/s0277-5387(00)83185-x.

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27

de Ferri, Lavinia, Andrea Lorenzi, Elisa Carcano, and Lorenza Draghi. "Silk fabrics modification by sol–gel method." Textile Research Journal 88, no. 1 (2016): 99–107. http://dx.doi.org/10.1177/0040517516676061.

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Sol–gel is a very effective method to obtain high purity ceramic and hybrid coatings on a variety of substrates. Thanks to their unique structure and extremely reduced thicknesses, sol–gel coatings can remain adherent and transparent even on flexible substrates such as textiles. Hence, their versatile chemistry can be exploited to impart a variety of properties to fabrics. Here, we evaluated the potential of sol–gel coatings for the functionalization of silk fabrics, and in particular for the preparation of coatings able to simultaneously improve abrasion resistance and attain water-repellency. To this end, tetra-ethyl-ortho-silicate based (TEOS) hybrid coatings were prepared using different Si-alkoxides functionalized with either alkyl chains or fluorinated groups. Abrasion resistance, oil and water contact angle, mechanical properties and water vapor permeability were assessed on treated fabrics to identify the more promising formulations.

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28

Bradley, Donald C., Halina Chudzynska, Michael B. Hursthouse, Majid Motevalli, and Ruowen Wu. "Fluorinated tertiary alkoxides of some lanthanides: tris-trifluorotertiarybutoxides of lanthanum, praseodymium and europium." Polyhedron 12, no. 24 (1993): 2955–60. http://dx.doi.org/10.1016/s0277-5387(00)80045-5.

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29

KOTUN, S. P., J. D. O. ANDERSON, and D. D. DESMARTEAU. "ChemInform Abstract: Fluorinated Tertiary Alcohols and Alkoxides from Nucleophilic Trifluoromethylation of Carbonyl Compounds." ChemInform 23, no. 29 (2010): no. http://dx.doi.org/10.1002/chin.199229103.

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30

Bradley, Donald C., Halina Chudzynska, Michael B. Hursthouse, Majid Motevalli, and Ruowen Wu. "Volatile fluorinated tertiary alkoxides of some lanthanides, tris-hexafluoro-tertiary butoxides of lanthanum, praseodymium and europium." Polyhedron 13, no. 1 (1994): 1–6. http://dx.doi.org/10.1016/s0277-5387(00)86629-2.

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31

Elinburg, Jessica K., and Linda H. Doerrer. "Synthesis, structure, and electronic properties of late first-row transition metal complexes of fluorinated alkoxides and aryloxides." Polyhedron 190 (November 2020): 114765. http://dx.doi.org/10.1016/j.poly.2020.114765.

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32

Boere, Rene T., and Christopher J. Willis. "Synthetic and NMR studies on fluorinated alkoxides of platinum(II): an investigation of the trans influence of alkoxides and the nature of the platinum-oxygen bond, using phosphine and thioether complexes." Inorganic Chemistry 24, no. 7 (1985): 1059–65. http://dx.doi.org/10.1021/ic00201a020.

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33

Bradley, Donald C., Halina Chudzynska, Michael B. Hursthouse, and Majid Motevalli. "The synthesis and characterization of volatile complexes of fluorinated alkoxides of yttrium. X-ray structures of [Y{OCMe(CF3)2}3(thf)3] and [Y{OCMe(CF3)2}3(diglyme)]." Polyhedron 12, no. 15 (1993): 1907–18. http://dx.doi.org/10.1016/s0277-5387(00)81430-8.

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34

Siler, C. G. F., R. J. Madix, and C. M. Friend. "Designing for selectivity: weak interactions and the competition for reactive sites on gold catalysts." Faraday Discussions 188 (2016): 355–68. http://dx.doi.org/10.1039/c5fd00192g.

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A major challenge in heterogeneous catalysis is controlling reaction selectivity, especially in complex environments. When more than one species is present in the gas mixture, the competition for binding sites on the surface of a catalyst is an important factor in determining reaction selectivity and activity. We establish an experimental hierarchy for the binding of a series of reaction intermediates on Au(111) and demonstrate that this hierarchy accounts for reaction selectivity on both the single crystal surface and under operating catalytic conditions at atmospheric pressure using a nanoporous Au catalyst. A partial set of measurements of relative binding has been measured by others on other catalyst materials, including Ag, Pd and metal oxide surfaces; a comparison demonstrates the generality of this concept and identifies differences in the trends. Theoretical calculations for a subset of reactants on Au(111) show that weak van der Waals interactions are key to predicting the hierarchy of binding strengths for alkoxides bound to Au(111). This hierarchy is key to the control of the selectivity for partial oxidation of alcohols to esters on both Au surfaces and under working catalytic conditions using nanoporous gold. The selectivity depends on the competition for active sites among key intermediates. New results probing the effect of fluorine substitution are also presented to extend the relation of reaction selectivity to the hierarchy of binding. Motivated by an interest in synthetic manipulation of fluorinated organics, we specifically investigated the influence of the –CF<sub>3</sub> group on alcohol reactivity and selectivity. 2,2,2-Trifluoroethanol couples on O-covered Au(111) to yield CF<sub>3</sub>CH<sub>2</sub>O–C(O)(CF<sub>3</sub>), but in the presence of methanol or ethanol it preferentially forms the respective 2,2,2-trifluoroethoxy-esters. The ester is not the dominant product in any of these cases, though, indicating that the rate of β-H elimination from adsorbed trifluoroethoxy is slower than that for either adsorbed methoxy or ethoxy, consistent with their relative estimated β-C–H bond strengths. The measured equilibrium constants for the competition for binding to the surface are 2.9 and 0.38 for ethanol and methanol, respectively, vs. 2,2,2-trifluoroethanol, indicating that the binding strength of 2,2,2-trifluoroethoxy is weaker than ethoxy, but stronger than methoxy. These results are consistent with weakening of the interactions between the surface and the alkyl group due to Pauli repulsion of the electron-rich CF<sub>3</sub> group from the surface, which offsets the van der Waals attraction. These experiments provide guiding principles for understanding the effect of fluorination on heterogeneous synthesis and further demonstrate the key role of molecular structure in determining reaction selectivity.

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35

Long, Jérôme, Aleksei O. Tolpygin, Dmitry M. Lyubov, et al. "High magnetization reversal barriers in luminescent dysprosium octahedral and pentagonal bipyramidal single-molecule magnets based on fluorinated alkoxide ligands." Dalton Transactions, 2021. http://dx.doi.org/10.1039/d1dt01319j.

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36

Carpentier, Jean-Francois. "ChemInform Abstract: Multidentate Fluorinated Alkoxide Ligand Platforms for Oxophilic Metal Centers - From MOCVD Source Reagents to Polymerization Catalysts." ChemInform 41, no. 14 (2010). http://dx.doi.org/10.1002/chin.201014199.

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37

PLENIO, H., E. EGERT, M. NIEGER, H. W. ROESKY, H. G. SCHMIDT, and G. M. SHELDRICK. "ChemInform Abstract: Preparation and Structural Investigations of Fluorinated Tungsten(IV) Alkoxides." ChemInform 19, no. 25 (1988). http://dx.doi.org/10.1002/chin.198825288.

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38

BOERE, R. T., and C. J. WILLIS. "ChemInform Abstract: SYNTHETIC AND NMR STUDIES ON FLUORINATED ALKOXIDES OF PLATINUM(II): AN INVESTIGATION OF THE TRANS INFLUENCE OF ALKOXIDES AND THE NATURE OF THE PLATINUM-OXYGEN BOND, USING PHOSPHINE AND THIOETHER COMPLEXES." Chemischer Informationsdienst 16, no. 32 (1985). http://dx.doi.org/10.1002/chin.198532334.

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