Investigation of Photo-Responsive Chiral Polyisocyanates
作者:
Jie Li,
GaryB. Schuster,
MarkM. Green,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 344,
issue 1
页码: 7-13
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023808
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A new class of polyisocyanates incorporating the 8-phenylmethylenebicyclo [3.2.1]octan-3-one chromophore through three different linkage patterns to the polymer backbone was synthesized. Photoresolution and photoracemization experiments were conducted to test its response to circularly polarized light (CPL). Irradiation of the polymers with CPL leads to the partial photoresolution of the bicyclicketone chromophore. This enantiomeric excess causes the polyisocyanate chain to favor one helical sense over the other. The handedness of the polymer chain can be switched with the sense of the circularly polarized light, leading to novel photoresponsive polyisocyanates.
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