Cross-linkable hydrazone-containing molecular glasses for electrophotography

The novel family of the hydrazone based hole-transporting materials with two epoxypropyl groups were synthesized and investigated as potential new materials for electrophotography. The molecular structure of these dihydrazones ensures good compatibility with most commonly used binding materials (BM) and allows stable films to be prepared. These materials may be of particular interest for development of future electrophotographic photoreceptors as the epoxy groups allow for cross-linking of these transporting materials (TM) in the layer without significant decrease of charge carrier mobility. Obtained compounds were characterized by differential scanning calorimetry and time of flight method. The highest hole mobility, exceeding 10−5 cm2/V s at 6 × 105 V/cm electric field, was observed in the hydrazones with triphenylamine moieties.