Synthesis and spectroscopic-voltammetric behaviors of silver(I) 2,5-diphenylthiazolo[5,4-d]thiazole

In the present work, 2,5-diphenylthiazolo[5,4-d]thiazole (DTT) and silver(I) 2,5-diphenylthiazolo[5,4-d]thiazole complex(Ag2DTT) were synthesized, and then their spectroscopic and voltammetric behaviors were investigated. The DTT was obtained by the reaction of rubeanic acid and benzaldehyde. Then the Ag2DTT was prepared using AgNO3 and DTT in DMSO. The DTT and Ag2DTT were examined by FT-IR, UV-vis. absorption and fluorescence spectroscopy. The UV-vis. measurements showed the formation of M2L type complex. The molar absorptivity coefficients (epsilon) of DTT and Ag2DTT at 420 nm were found as 11,952 and 21,747 L/cm mol in DMSO, and 11,062 and 13,861 L/cm mol in CH3CN, respectively. In addition, the electrochemistry of both DTT and Ag2DTT was performed using cyclic voltammetry. The HOMO-LUMO band gaps of DTT and Ag2DTT were calculated as 3.26 and 2.96 eV, respectively. The fluorescence measurements showed that both DTT and Ag2DTT have fluorescence emissions at 451 nm in DMSO with the excitation at 380 nm. The metal complexes of 2,5-diphenylthiazolo[5,4-d]thiazole can be useful for various electronic and optical applications. (C) 2013 Elsevier Ltd. All rights reserved.