화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals, Vol.538, 199-207, 2011
Synthesis and Characterization of Novel Pyrene Derivatives Containing Thienyl Groups
New thiophene modified pyrene derivatives 4,5,9,10-tetra(2-thienyl)-2,7-di-tert-butylpyrene (TTP) and 4,5,9,10-tetra(2-(5-hexyl) thienyl)-2,7-di-tert-butylpyrene (THTP) have been designed and synthesized by Friedel-Crafts alkylation reaction, bromination, Stille Coupling reaction of pyrene, and so on. The optical band gaps of the TTP and THTP determined from the absorption onsets were 3.21 and 3.10 eV, respectively. The energy levels for highest occupied molecular orbital (E(HOMO)) were determined from their cyclic voltammograms to be -5.84 and -5.68 eV, respectively. The relatively large band gaps and low E(HOMO) levels imply that these materials have high stability against photo-degradation, and may be promising candidates for stable hole-transporting materials.