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

作者：Adeloye Adewale O; Ajibade Peter A^*

来源：Journal of Spectroscopy, 2014, 2014: 869363.

DOI：10.1155/2014/869363

New heteroleptic ruthenium(II) complex was formulated as [Ru(L-1)(2) (NCS)(2)], where L-1 = 9-anthracenyl-10-(2-methyl-2-butenoic acid)-1,10-phenanthroline was synthesized and its photophysical properties were studied and compared to previously reported analogue complex containing no anthracene moiety [Ru(L-2)(2)(NCS)(2)], L-2 = (2-methyl-2-butenoic acid)-1,10-phenanthroline. The two complexes though exhibit very strongmolar extinction coefficient values; however, [Ru(L-1)(2) (NCS)(2)] shows better characteristic broad and intense metal-to-ligand charge transfer (MLCT) absorption band and higher molar absorptivity coefficient at (lambda(max) = 522 nm, epsilon = 6.60 x 10(4) M-1 cm(-1)) than that of [Ru(L-2)(2) (NCS)(2)] complex, (lambda(max) = 446 nm, epsilon = 4.82 x 10(4) M-1 cm(-1)). At room temperature, long wavelength emissions with strong intensity ratio centered at 660nm were recorded for [Ru(L-1)(2)(NCS)(2)] complex with a bathochromic shift (lambda(em) = 700 nm) for [Ru(L-2)(2)(NCS)(2)] complex. It was shown that the luminescence wavelength characteristic of the complexes may be a function relating to the increasing length of pi-conjugation and/or molecular weight. A preliminary cyclic voltammetry of [Ru(L-1)(2) (NCS)(2)] complex also exhibits good electroredox activity with oxidation potential of about 1.04V, significantly better than other Ru(II) polypyridine complexes containing bidentate ligands.

• 出版日期2014