Synthesis of Novel Derivatives of Carbazole-Thiophene,Their Electronic Properties,and Computational Studies

A series of carbazole-thiophene dimers,p1-p9,were synthesized using suzuki-miyaura and ullmann coupling reactions. in p1-p9,carbazole-thiophenes were linked at the n-9 position for different core groups via biphenyl,dimethylbiphenyl,and phenyl. electronic properties were evaluated by uv-vis,cyclic voltammogram,and theoretical calculations. particularly,the effects of conjugation connectivity on photophysical and electrochemical properties,as well as the correlation between carbazole-thiophene and the core,were studied. carbazole connecting with thiophenes at the 3,6-positions and the phenyl group as a core group leads to increased stabilization of homo and lumo energy levels where the bandgap (δ e) is significantly reduced. © 2016 e. f. damit et al.