Patent ID: 8859533

Claim:
A composition comprising a complex represented by Formula I: M m+ (L 1 )(L 2 )(L 3 )(L 4 )(L 5 ) Formula I wherein M is rhodium or ruthenium; m is 2 or 3; L 1 is benzo[a]phenazine-5,6-diimine or chrysene-5,6-diimine; wherein: L 2 and L 3 are adjacent each other, and either L 2 and L 3 are both NH 3 , or L 2 and L 3 combine to form a first single ligand with two coordination sites to M, L 4 and L 5 are adjacent each other, and either L 4 and L 5 are both NH 3 , or L 4 and L 5 combine to form a second single ligand with two coordination sites to M, and each of the first and second single ligands is independently selected from the group consisting of: wherein, in Formula II and Formula III, R 1 is selected from the group consisting of: alkyl groups terminating in one selected from the group consisting of CH 3 , OH, SH, NH 2 , COOH, N 3 , and alkynyl-linked peptide moieties, and PEGylated groups terminating in one selected from the group consisting of CH 3 , OH, SH, NH 2 , COOH, N 3 , and alkynyl-linked peptide moieties, wherein: when L 2 , L 3 , L 4 , and L 5 are each NH 3 , L 1 is phzi and/or M is ruthenium, when M is rhodium and the first single ligand is bpy or HDAP, L 4 and L 5 are both NH 3 , when the first single ligand and the second single ligand are both the same and are bpy, phen, or HDAP, L 1 is phzi and/or M is ruthenium, or when M is rhodium and the first single ligand is phen, L 4 and L 5 combine to form the second single ligand, and the second single ligand is selected from the group consisting of bpy, DPE, HDPA, DPK, 2-(pyridin-2-ylmethyl)pyridine, Formula II, and Formula III.