Synthesis and characterization of new liquid crystallines containing a mono-aza styrylated indolinobenzospiropyran.Part 6

摘要

A series of new liquid crystalline compounds containing a mono-aza styrylated indolinobenzospiropyran,1a-1d,has been synthesized.The synthesized LC dyes are subjected to thermal analysis on a differential scanning calorimeter (DSC),to texture of phase on a polarizing microscope and electro-optical system.All compounds eamined in the series are monotropic and have relatively low mp's (125-128 deg C).Nematic liquid crystal phaes are detected both on cooling from isotropic liquid and on heating from crystal of the LC compounds.