- Identifying the Stoichiometry of Metal/Ligand Complex by Coupling Spectroscopy and Modelling: a Comprehensive Study on Two Fluorescent Molecules Specific to Lead
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Two new chemosensors for lead (II) were synthesized based on 5-((anthracen-9-ylmethylene) amino)quinolin-10-ol (ANQ). ANQ was modified in the para position of the imine group via a methoxy link either with methylmethacrylate (ANQ-MMA) or styrene (ANQ-ST).
- René, William,Arab, Madjid,Laatikainen, Katri,Mounier, Stéphane,Branger, Catherine,Lenoble, Véronique
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- Polymer Zwitterions with Phosphonium Cations
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Polymer zwitterions are of interest for numerous applications, many of which stem from their antifouling properties when used as hydrophilic coatings. However, the chemical compositions of polymer zwitterions remain limited, with synthetic variants most t
- Brown, Marcel U.,Emrick, Todd,Triozzi, Alexandria
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- Synthesis, optical properties and photovoltaic applications of hybrid rod-coil diblock copolymers with coordinatively attached CdSe nanocrystals
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The performance of hybrid solar cells based on conjugated polymers and nanostructured inorganic semiconductors is often limited by the poor interfacial interaction and the lack of controlled phase separation. Improvements are being made by building intima
- Li, Shaohua,Li, Yong,Wisner, Clarissa A.,Jin, Lu,Leventis, Nicholas,Peng, Zhonghua
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- PHOSPHONIUM-BASED ZWITTERIONIC MONOMERS AND POLYMERS, AND COMPOSITIONS AND METHODS THEREOF
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The invention provides novel zwitterionic monomers and polymers (including copolymers) with pendent phosphonium-based zwitterionic moieties, and compositions and products comprising same, as well as related methods and uses of the compositions, for exampl
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Paragraph 0072
(2021/03/13)
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- Syntheses of polyfunctionalized resveratrol derivatives using Wittig and Heck protocols
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Improved protocols for Wittig reaction and palladium-catalyzed Heck coupling give expedient access to a series of unprecedented polyfunctionalized artificial-resveratrol derivatives. In the modified Wittig protocol, trimethylsilyl was used as a highly valuable protective group of the phenolic functions of starting aromatic materials. A clean O-alkylation of hydroxylated stilbenes with ethylene carbonate was also conducted. Thus, Wittig reaction followed by hydroxyethylation take place one-pot with only carbon dioxide as waste. Additionally, a palladium-catalyzed Heck coupling strategy was developed by using ferrocenyl phosphane ligands, and multi-functionalized hydroxylated stilbenes were obtained without the need of any protection/deprotection sequence. Up to six functional groups are introduced by these procedures, which limit the number of reactions steps, the waste toxicity, and the use of costly reagents.
- Chalal, Malik,Vervandier-Fasseur, Dominique,Meunier, Philippe,Cattey, Hélène,Hierso, Jean-Cyrille
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experimental part
p. 3899 - 3907
(2012/07/14)
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- Synthesis of ferrocenethiols containing oligo(phenylenevinylene) bridges and their characterization on gold electrodes
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Ferrocene-terminated oligo(phenylenevinylene) (OPV) methyl thiols have been prepared by orthogonal coupling of phenylene monomers. Ethoxy substituents on the phenyl rings improve the solubility of OPV, enabling the synthesis of longer oligomers. Self-assembled monolayers containing a mixture of a ferrocene OPV methyl thiol and a diluent alkanethiol were deposited on gold. A cyclic voltammetric study of monolayers containing oligomers of the same length with and without ethoxy solubilizing groups reveals that both solubilized and unsolubilized oligomers form well-packed self-assembled monolayers. Changing the position of the solubilizing groups on an oligomer chain does not preclude packing of the oligomer in the monolayer. Conventional chronoamperometry, which can be used to measure rate constants up to ~104 S-1, is too slow to measure the electron-transfer rate through these oligomers over distances up to 35 A. OPV bridges are expected to be highly conjugated unlike oligo(phenyleneethynylene) bridges, which may be only partially conjugated because of rotation of the phenyl rings about the ethynylene bonds. Because of its high conjugation, OPV may prove useful as a molecular wire.
- Dudek,Sikes,Chidsey
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p. 8033 - 8038
(2007/10/03)
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