3b02 Thermal and photo-induced phase transitions of alkylazobenzene-triphenylene homologues

Abstract

The alkyl homologues of azobenzene-triphenylene mesogen(C11-C16) were studied on both thermal and photo-induced phase transitions by DSC, POM and XRD measurements. All homologues exhibit SmA and Colr mesophases and only C12 and C11 possesses SmC phase as the additional mesophase. The clearing points show an odd-even effect. Interestingly, photo intensity dependence on isothermal phase transitions is dependent on the chain length.