Coil-to-Rod Transition of Conjugated Polymers Prepared by Cyclopolymerization of 1,6-Heptadiynes
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Date
2013-09-17Type
- Journal Article
ETH Bibliography
no
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Abstract
We report the conformational change resulting from the coil-to-rod transition in conjugated polymers prepared by the cyclopolymerization of 1,6-heptadiyne derivatives (poly(cyclopentenylene-vinylene), PCPV). By aging a PCPV solution under various conditions, we observed dramatic changes in their absorption spectra (appearance of a 00 vibronic peak) and an increase in the MarkHouwinkSakurada shape parameter, thereby confirming the coil-to-rod transition of the polymer. Further studies using NMR spectroscopy and various control experiments demonstrated that the coil-to-rod transformation resulted from the cis-to-trans isomerization of the conjugated olefins by a radical mechanism. Show more
Publication status
publishedExternal links
Journal / series
ACS Macro LettersVolume
Pages / Article No.
Publisher
American Chemical SocietyOrganisational unit
09767 - Choi, Tae-Lim / Choi, Tae-Lim
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ETH Bibliography
no
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