Advances in Ni(0)-Catalyzed Coupling for the Synthesis of Polythiophenes and Polyphenylenes

Autor:	Valerie V. Sheares, Erik C. Hagberg, David A. Olson
Rok vydání:	2004
Předmět:	chemistry.chemical_classification Polymers and Plastics Intrinsic viscosity Organic Chemistry Polymer Oligomer Inorganic Chemistry Solvent chemistry.chemical_compound Monomer Polymerization chemistry Polymer chemistry Materials Chemistry Thiophene Solvent effects
Zdroj:	Macromolecules. 37:4748-4754
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma0355453
Popis:	The effects of solvent and monomer structure on the Ni(0)-catalyzed polymerization of 2,5-dichloro-3-(2‘-thiophenecarbonyl)thiophene, 3-benzenesulfonyl-2,5-dichlorothiophene, 2,5-dichlorobenzophenone, and 2-benzenesulfonyl-1,4-dichlorobenzene were explored. Poly[3-(2‘-thiophenecarbonyl)-2,5-thiophene] with an intrinsic viscosity of 0.38 dL/g and a 10% weight loss temperature in nitrogen of 480 °C (Tg = 149 °C) was synthesized. Oligomeric material was prepared from 3-benzenesulfonyl-2,5-dichlorothiophene. Poly(2,5-benzophenone) of 58 × 103 g/mol ([η] = 1.15 dL/g) with a Tg of 180 °C and a 10% weight loss temperature in nitrogen of 576 °C was synthesized. Oligomeric materials were also obtained from the polymerization of 2-benzenesulfonyl-1,4-dichlorobenzene. It was shown that the solvent choice has drastic effects upon the catalyst system and the final polymer. The differences in the catalyst resulting from solvent choice were explored by nuclear magnetic resonance. Effects arising from the structure of th...
Databáze:	OpenAIRE
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