Molecular Crystals and Liquid Crystals, Vol.427, 419-428, 2005
9-(4-Methoxyphenyl) carbazolyl-containing hydrazones for optoelectronic applications
9-(4-methoxyphenyl)carbazolyl-containing hydrazones were prepared by multi-step synthetic route including Ullmann coupling of carbazole with 4-iodoanisole, formylation of 9-(4-methoxyphenyl)carbazole by Vilsmeier reaction and the condensation of mono- or dicarbaldehydes obtainexd with differently substituted hydrazines. All the hydrazones synthesized form glasses with the glass transition temperatures ranging front 56 to 110 degrees C. Their ionization potentials established by electron photoemission technique are in the range 5.3-5.47 eV. Hole drift mobilities of 50% solid solutions of the hydrozones in polycarbonate established by the xerographic time-of-flight technique exceed 10(-5) cm(2)/Vs at high electric fields.