A High Molar Extinction Coefficient Ru(II) Complex Functionalized with cis-Dithiocyanato-bis-(9-anthracenyl-10-(2-methyl-2-butenoic acid)-1,10-phenanthroline): Potential Sensitizer for Stable Dye-Sensitized Solar Cells

摘要: New heteroleptic ruthenium(II) complex was formulated as [Ru(L1)2(NCS)2], where L1 = 9-anthracenyl-10-(2-methyl-2-butenoic acid)-1,10-phenanthroline synthesized and its photophysical properties were studied compared to previously reported analogue containing no anthracene moiety [Ru(L2)2(NCS)2], L2 (2-methyl-2-butenoic acid)-1,10-phenanthroline. The two complexes though exhibit very strong molar extinction coefficient values; however, [Ru(L1)2(NCS)2] shows better characteristic broad intense metal-to-ligand charge transfer (MLCT) absorption band higher absorptivity at ( nm, M−1 cm−1) than that of [Ru(L2)2(NCS)2] complex, cm−1). At room temperature, long wavelength emissions with intensity ratio centered 660 nm recorded for a bathochromic shift nm) complex. It shown the luminescence may be function relating increasing length π-conjugation and/or molecular weight. A preliminary cyclic voltammetry also exhibits good electroredox activity oxidation potential about 1.04 V, significantly other Ru(II) polypyridine bidentate ligands.