Synthesis of conjugated polymers by vapor deposition polymerization

Chain-Shu Hsu*, Ting Li Lin

*Corresponding author for this work

研究成果: Conference article同行評審

摘要

The synthesis of poly(2,5-thienylene vinylene) and poly(4,7-thianaphthene) by vapor deposition polymerization is presented. 2,5-Di(bromomethyl)thiophene was subjected to vapor phase pyrolysis at 550 °C to form a reactive intermediate. Upon condensation, the reactive intermediate polymerized spontaneously at a temperature higher than -25 °C to produce poly(2,5-thienylene vinylene). The obtained poly(2,5-thienylene vinylene)s were fractionated into THF soluble and insoluble fractions. The number average molecular weights of the THF soluble fractions range from 1500 to 4000 as determined by GPC measurements. The obtained polymer shows no glass transition and melting point on the DSC scans. Doping of a poly(2,5-thienylene vinylene) film with I2 vapor led to a conductivity of 1×10-4 S cm4. In the second part of this study, 2,3-diethynylthiophene was subjected to vapor phase pyrolysis at 300 °C to yield a reactive intermediate, 4,7-dehydrothianaphthene. Upon condensation, the obtained 4,7-dehydrothianaphthenene was polymerized spontaneously at a temperature higher than -25 °C to produce poly(4,7-thianaphthene). The obtained poly(4,7-thianaphthene) was insoluble in common laboratory solvents and shows also no melting point and glass transition on the DSC scans.

原文English
頁(從 - 到)347-357
頁數11
期刊Materials Research Society Symposium - Proceedings
488
DOIs
出版狀態Published - 1 十二月 1997
事件Proceedings of the 1997 MRS Fall Meeting - Boston, MA, USA
持續時間: 1 十二月 19975 十二月 1997

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