Molecular Crystals and Liquid Crystals p. 241/[573]-253/[585] (2008)
Update date:2022-08-16
Topics:
Vaitkeviciene
Grazulevicius
Jankauskas
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, 1H NMR, and 13C NMR is presented. All the compounds represent amorphous materials with glass transition temperatures ranging from 28C to 112C and with 5%-weight-loss temperatures exceeding 308C. The electron photoemission spectra of the materials were recorded, and the ionization potentials of ca. 5.5eV were established. Time-of-flight hole drift mobilities of the amorphous films of some synthesized compounds exceed 10-5cm2/Vs at high electric fields.
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