- Syntheses and Electrical Properties of Organosilicon Polymers Containing Thiophene and Anthraquinone Units
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Organosilicon polymers containing thiophene and anthraquinone units in the main chain were synthesized using palladium catalyst.These polymers were soluble and showed a small UV absorption change by the substituents on the silicon atom.Some of the polymers exhibit cation doping (n-doping) by the electrochemical reduction, and this doping process seemed to depend on the kinds of substituents on silicon atom.These polymers showed electrical conductivity of 3 * 10-5 S cm1- when doped with sodium naphthalenide.
- Yi, Sang Ho,Ohashi, Syunsuke,Sato, Hisaya,Nomori, Hiroyuki
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- Electrochemical synthesis of bis(2-thienyl) silanes, 2-thienylchlorosilanes, bis[5-(2-bromothienyl)]silanes, and 5-(2-bromothienyl) dimethylchlorosilane, precursors of poly[(silanylene) thiophene]s
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Bis(2-thienyl)silanes and bis[5-(2-bromothienyl)]silanes were synthesized by electrochemical reduction of monohalothiophenes (Br,C1) and 2,5-dibromothiophene respectively in the presence of a dichlorosilane in THF or DME, using an undivided cell, a sacrif
- Moreau, Carole,Serein-Spirau, Francoise,Bordeau, Michel,Biran, Claude,Dunogues, Jacques
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- METHOD FOR PRODUCING ARYLSILANE COMPOUND CONTAINING HALOSILANE COMPOUND AS RAW MATERIAL
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PROBLEM TO BE SOLVED: To provide a method for producing an arylsilane compound with low production cost. SOLUTION: A method for producing an arylsilane compound includes a reaction step for the cross-coupling reaction of a halosilane compound represented by general formula (A-1), (A-2), or (A-3) and an arylboronic acid pinacol ester in the presence of a nickel catalyst, a Lewis acid catalyst, and an organic base (R independently represent an aromatic hydrocarbon group, a heteroaromatic ring group, or a C1-20 hydrocarbon group; X independently represent a halogeno group or a trifluoromethanesulfonyloxy group). SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
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Paragraph 0059-0063
(2020/03/06)
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- Synthesis and characterization of di-, tri- and tetraboronic acids based on phenyl- and thienylsilane cores
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The synthesis of a series of di- tri- and tetraboronic acids based on respective phenyl- and thienylsilane cores is described. The optimal protocols involved lithiation of respective arylsilane precursors using either deprotonative lithiation or halogen/lithium exchange with n-BuLi followed by treatment of resultant intermediates with B(Oi-Pr)3 and subsequent hydrolysis, which afforded final products in good yields. X-ray crystal structures of selected diboronic derivatives were determined showing that hydrogen-bonding interactions of B(OH)2 groups are the main factor governing the supramolecular assembly.
- Gontarczyk, Krzysztof,Durka, Krzysztof,Klimkowski, Piotr,Luliński, Sergiusz,Serwatowski, Janusz,Wo?niak, Krzysztof
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- PREPARATION OF 2,5-DISILYLATED THIOPHENE DERIVATIVES AND THEIR CONVERSION TO 2,5-DIHALO DERIVATIVES
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2,5-Disilylated thiophenes were prepared and readily oxidized with m-chloroperbenzoic acid (m-CPBA) to give the corresponding 1,1-dioxides.The thiophene dioxide was converted to 2,5-dihalogenothiophene dioxides with halogenating agents.
- Furukawa, Naomichi,Hoshiai, Hiroki,Shibutani, Tadao,Higaki, Masato,Iwasaki, Fujiko,Fujihara, Hisashi
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p. 1085 - 1088
(2007/10/02)
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- Photolysis of 1,1,2,2-tetramethyl-1,2-bis-(2'-thienyl)disilane
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Photolysis of 1,1,2,2-tetramethyl-1,2-bis-(2'-thienyl)disilane (I) in methanol/benzene leads to dimethyl-bis-(2'-thienyl)silane (III), 2-methoxydimethylsilylthiophene (IV) and 2-dimethylsilylthiophene (V) as a major products.The mechanism of this reaction, has been explored by use of methanol-d4.The predominant pathway leading to IV and V appears to involve direct reaction of methanol with the photoexcited state of I.
- Hu, Shui-Sheng,Weber, William P.
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p. 155 - 164
(2007/10/02)
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