Polymeric and low-molar-mass glass-forming diphenylsulphone-based hydrazones

New polymeric hydrazones were prepared by polycondensation of bis(4-hydrazinophenyl)sulfone with the differently substituted diformyl carbazoles. Their optical, thermal and photoelectrical properties were studied and compared with those of the new and earlier synthesized low-molar-mass glass-forming diphenylsulfone dihydrazones. The glass transition temperatures of the studied compounds range from 22 to 123 degrees C. The ionisation potentials of the films of diphenylsulfone hydrazone compounds measured by the electron photoemission technique range from 5.00 to 5.88 eV. Hole-drift mobilities in the amorphous films of the solid solutions of one diphenylsulfone dihydrazone in bisphenol Z polycarbaonate exceed 10(-5) cm(2)/(Vs) at high applied electric fields as characterized by the time-of-flight method.