9-(4-Methoxyphenyl) Carbazolyl-Containing Hydrazones for Optoelectronic Applications Ausra Matoliukstyte Ramunas Lygaitis Juozas Vidas Grazulevicius Department of Organic Technology, Kaunas University of Technology, Kaunas, Lithuania Valentas Gaidelis Vygintas Jankauskas Edmundas Montrimas Department of Solid State Electronics, Vilnius University, Vilnius, Lithuania Zbig Tokarski Nusrallah Jubran Samsung Information Systems America, Woodbury, USA 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 con- densation of mono- or dicarbaldehydes obtainexd with differently substituted hydrazines. All the hydrazones synthesized form glasses with the glass transition temperatures ranging from 56 to 110  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 hydrazones in polycarbonate established by the xero- graphic time-of-flight technique exceed 10 5 cm 2 =Vs at high electric fields. Keywords: charge transport properties; hydrazone; ionization potential; low-molar- mass glasses Financial support from Samsung Electronics and Lithuanian State Science and Stu- dies Foundation is gratefully acknowledged. Dr. J. A. Reina from the University of Rovira i Virgili (Tarragona, Spain) is thanked for the help in characterization of the title materials. Address correspondence to J. V. Grazulevicius, Department of Organic Technology, Kaunas University of Technology, Radvilenu Plentas 19, LT-50254, Kaunas, Lithuania. Tel.: þ 37037-456-525, Fax: þ 37037-456-525, E-mail: Juozas.Grazulevicius@ktu.lt Mol. Cryst. Liq. Cryst., Vol. 427, pp. 107=[419]–116=[428], 2005 Copyright # Taylor & Francis Inc. ISSN: 1542-1406 print=1563-5287 online DOI: 10.1080/15421400590892082 107=[419]