Hole-transporting thiophene-based hydrazones with reactive vinyl groups

摘要

Synthesis and optical, thermal, electrochemical, and photoelectrical properties of new thiophene-based hydrazones with reactive vinyl groups are reported. The synthesized compounds were characterized by ' H, ~(13)C NMR, IR, UV/vis, fluorescence, mass spectrometries, and cyclic voltammetry. The synthesized thiophene-based hydrazones form glasses with the glass transition temperatures ranging from 15 °C to 72 °C, as it was elucidated by DSC. Cyclic voltammetry measurements showed that all the synthesized dihydrazones are electrochemically stable up to 0.8 V. Their oxidation potentials are in the range of 0.02-0.55 V. Solid state ionization potentials of these compounds were found to be in the range of 4.82-5.35 eV. Time-of-flight hole-drift mobility in the layer of di-(2-(4-vinylbenzyl)-2-phenyl-l-((thiophene-2-yl)methylene))hydrazone approached 10-5 cm2/Vs at high electric field.