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Photosensitive chiral polyisocyanates
Author(s) -
Mayer Sabine,
Maxein Georg,
Zentel Rudolf
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991370108
Subject(s) - photoisomerization , optical rotation , side chain , helix (gastropod) , absorption (acoustics) , materials science , photochemistry , cotton effect , chirality (physics) , isomerization , chemistry , circular dichroism , stereochemistry , physics , organic chemistry , polymer , catalysis , composite material , chiral symmetry , ecology , nambu–jona lasinio model , quantum mechanics , snail , biology , quark
The dynamic polyisocyanate helix amplifies changes in the conformation of its side groups. Thereby it acts like a fast responding switch for optical properties. Here we show how the photoisomerization of chiral azo side groups can be used to induce large changes of chirooptical properties. These changes can be detected by CD measurements or by ORD measurements far from the absorption region. Large changes of the optical rotation can be induced reversibly in a multicycle process.