Polypyridines phenanthroline

Similarly to polypyridine complexes of other d metals, Ir(III)-bipyridine [106, 186] and phenanthroline [186, 187] complexes form extensive ligand-based redox series. The [Ir(bpy)3] series comprises eight members related by one-electron steps [106], [Ir(bpy)3] + is reduced in six successive one-electron steps which occur in two groups of closely spaced three reductions spanning the range from —1.22 to -2.76 V. It also has an one-electron irreversible oxidation at ca -1-1.7 V, presumably to [Ir(bpy)3] +. The substituted complex [Ir(bpy)2(Cl)2] has an irreversible oxidation and four one-electron reductions, presumably ligand-based. The reduction mechanism is complicated by dissociation of Cl ligand(s) on electron uptake [186]. 

Tor has reported a versatile method for the site-specific incorporation of polypyridine Ru and Os complexes into DNA oligonucleotides using solid-phase phosphoramidite chemistry. Nucleoside phosphoramidites containing a [(bpy)2M(3-ethynyl-l,10-phenanthroline)] " metal center covalently attached to... 

Coordination compounds with 1,10-phenanthroline, 2,2 -bipyridine and other polypyridine ligands as synthetic building blocks 02SL1043. 

In other work with polypyridine ligands Huchital and Martell et all2 prepared [Co(terpy)(bipy)]2+ and [Oo(terpy)(phen)]2+ (terpy = 2,2 6, 2"-terpyridine phen = 1,10-phenanthroline) complexes in aqueous solutions which were identified in situ by... 

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