Experimental studies on a triply reentrant mesogen

Abstract

We present here the results of our detailed optical, X-ray, high pressure and dielectric studies on 4-nonyloxyphenyl-4'-nitrobenzoyloxybenzoate (DB9ONO2), a triply reentrant compound which exhibits the following sequence of transitions at atmospheric pressure on cooling the isotropic phase: I-N-Ad-Nre-Ad(re)-Nre-A1-C-A2-C2. The existence of the A2 phase, not reported so far in this compound, is clearly shown from our studies.