Hole-Transporting Pyrenyl-Substituted Derivatives of Fluorene and Carbazole

The properties of the pyrenyl-substituted fluorene and carbazole compounds exhibiting charge carrier transport properties are reported. Cyclovoltammetric experiments revealed the electrochemical stability of the fluorene compounds. In contrast to the fluorene derivatives, the carbazole compounds showed nonreversible oxidations in the CV experiments. The pyrene-substituted fluorene and carbazole derivatives showed capability of transporting holes as characterized by xerographic time of flight technique. Ionization potential values measured by electron photoemission spectroscopy were found to be in the range of 5.70 eV – 5.93 eV.