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Liquid-crystalline structure of poly(L-lysine) containing azobenzene units in the side chain

✍ Scribed by Bernard Gallot; Marc Fafiotte; Adriano Fissi; Osvaldo Pieroni

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
490 KB
Volume
17
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

The structure of poly(L‐lysine) containing 44% azobenzene units in the side chain was studied by X‐ray diffraction between room temperature and 150°C. The polymer exhibits a mesomorphic structure of the smectic A1 type. In this structure, stable at least until 150°C, each smectic layer of thickness d results from the superposition of two layers: one of thickness d~A~ contains the free lysine side chains, the other of thickness d~B~ contains the azobenzene modified lysine side chains and the polypeptide main chains, that in their planes are arranged as in the “antiparallel” β‐structure classical for polypeptides.

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