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Synthesis and characterisation of new diindenothienothiophene (DITT) based materials

Afonina, I. and Skabara, P.J. and Vilela, F. and Kanibolotsky, A.L. and Forgie, J.C. and Bansal, Ashu K. and Turnbull, G. and Samuel, Ifor D. W. and Labram, John G. and Anthopoulos, T.D. and Coles, Simon J. and Hursthouse, M.B. (2010) Synthesis and characterisation of new diindenothienothiophene (DITT) based materials. Journal of Materials Chemistry, 20 (6). pp. 1112-1116.

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Abstract

Three new diindenothienothiophene (DITT) based materials were synthesised and their electrochemical properties investigated. The HOMO-LUMO gaps were observed to be 3.33, 3.48 and 2.81 eV, respectively. Cyclic voltammetry results indicate increased stability for the alkylated derivatives. The dioxide exhibits strong photoluminescence, giving a photoluminescence quantum yield of 0.72 in solution and 0.14 in the solid state. Hole mobility measurements were carried out on the non-alkylated derivative and the corresponding values were ~10-4 cm2 V-1 s-1.