Thorpe-Ingold effect on the helicity of chiral alternating silylene-divinylarene copolymers
Resource
Chemistry-An Asian Journal 3 (8-9): 1620-1624
Journal
Chemistry - An Asian Journal
Journal Volume
3
Journal Issue
8-9
Pages
1620-1624
Date Issued
2008
Author(s)
Yeh, Mei-Yu
Abstract
The concept of the Thorpe-Ingold effect has been used to rationalize the helicity of the silylene-spaced divinylarene copolymers having chiral substituents. Diisopropylsilylene-spaced divinylbenzene copolymers having chiral 2-methylbutoxy substituents have been shown to exhibit a helical conformation. The presence of the bulky isopropyl substituents on silicon would render each of the monomeric units in these copolymers to favor a syn-syn conformation. The copolymer would thus be more folded to form helical morphology as revealed by the notable enhancement of the circular dichroic intensity. The reversible temperature-dependent circular dichroism (CD) profiles further support the stable helical conformation for the copolymers 4b and 5b. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
Type
journal article
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