Two new ruthenium complexes [Ru(dcbpy)(L)(NCS)(2)] where dcbpy is 4,4'-dicarboxylic acid-2,2'-bipyridine and L is 3,8-bis(4-octylthiophen-2-yl)-1,10-phenanthroline (CYC-Pl) or 3,8-bis(4-octyl-5-(4-octylthiophen-2yl)-1,10-phenanthroline (CYC-P2), are synth