Molecular Crystals and Liquid Crystals, Vol.497, 573-585, 2008
3,3'-Bicarbazolyl-Containing Oxirane and its Reaction Products as New Glass-Forming Electroactive Materials
Low-molar-mass oxiranyl-substituted 3,3'-bicarbazolyl derivatives were synthesized by the reaction of 3,3'-bicarbazolyl-containing oxirane with dimercapto compounds as linking agents. The cationic ring opening polymerization of oxirane monomers was performed using ytterbium (III) trifluoromethanesulfonate [Yb(OTf)(3)] as a cationic initiator to obtain polyether. The full characterization of the compounds by mass spectrometry, IR, (1)H NMR, and (13)C NMR is presented. All the compounds represent amorphous materials with glass transition temperatures ranging from 28 degrees C to 112 C and with 5%-weight-loss temperatures exceeding 308 degrees C. The electron photoemission spectra of the materials were recorded, and the ionization potentials of ca. 5.5 eV were established. Time-of-flight hole drift mobilities of the a morph oils film of some synthesized compounds exceed 10(-5) cm(2)/Vs at high electric fields.