摘要
4 novel rod-like Schiff base magnetic liquid crystals have been prepared in which trans-bicyclohexyl or trans-cyclohexyl phenyl and biphenyl carboxylic acid phenol ester mesogenic cores with n-propyl and n-pentyl subsfituents were terminated by 4-amino-TEMPO (TEMPO=2,2,6,6-tetramethylpiperidine-l-oxyl). Of these compounds the silk-like and schlieren textures were found from 4e and 4d by POM (Polarizing Optical Microscope). DSC (Differential Scanning Calorimeter) measurements show that the mesophase exists from 4-6℃. EPR spectra reveal their paramagnetic properties.
4 novel rod-like Schiff base magnetic liquid crystals have been prepared in which trans-bicyclohexyl or trans-cyclohexyl phenyl and biphenyl carboxylic acid phenol ester mesogenic cores with n-propyl and n-pentyl subsfituents were terminated by 4-amino-TEMPO (TEMPO=2,2,6,6-tetramethylpiperidine-l-oxyl). Of these compounds the silk-like and schlieren textures were found from 4e and 4d by POM (Polarizing Optical Microscope). DSC (Differential Scanning Calorimeter) measurements show that the mesophase exists from 4-6℃. EPR spectra reveal their paramagnetic properties.