Journal of Materials Chemistry

The influence of intramolecular hydrogen bonding on the order parameter and photostability properties of dichroic azo dyes in a nematic liquid crystal host

J Griffiths, KC Feng

Index: Griffiths, John; Feng, Kai-Chia Journal of Materials Chemistry, 1999 , vol. 9, # 10 p. 2333 - 2338

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Citation Number: 17

Abstract

It has been demonstrated that intramolecular hydrogen bonding in two classes of dichroic azo dyes has a generally detrimental effect on order parameter in a nematic liquid crystal host. Derivatives of 4-(N, N-diethylamino)-4′-nitroazobenzene with hydroxy groups intramolecularly hydrogen bonded to the azo group show lower order parameters in E7 nematic liquid crystal than the parent dye, but higher order parameters than ...