3B11 N-[4-(4-n-alkoxybenzoyloxy)-2hydroxybenzylidene]-chioroanilines同族体の液晶性とフォトクロミック性

概要

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Homologous series of N-[4-(4-n-alkoxybenzoyloxy)-2-hydroxybenzylidene]-chloroanilines [AHC(n; n=1-8)] were synthesized. ortho-C1 substituted AHC(1) exhibited a monotropic nematic phase and the AHC(2-8) a nematic phase. The temperature dependence of Raman and IR spectra of AHCs was observed and some of the Raman and IR bands changed in intensity and wavenumber through the phase-transitions. Their changes can be explained by the change of the molecular conformation. Most of AHCs exhibited the photochromic properties. Of particular interest is that different photochromic properties of two crystalline forms of ortho-AHC(1) and para-AHC(4) are observed. This can be explained by the change of the molecular conformation through the measurement of the Raman and IR spectra.
日本液晶学会の論文
1998-10-12