Iridium polypyridyl complexes

The ruthenium(II) polypyridyl complexes are also popular but the brightnesses do not exceed 15,000 and thermal quenching is rather significant. This property can be utilized to design temperature-sensitive probes providing that the dyes are effectively shielded from oxygen (e.g., in polyacrylonitrile beads). Despite often very high emission quantum yields the visible absorption of cyclometallated complexes of iridium(III) and platinum(II) is usually poor (e < 10,000 M-1cm-1), thus,... 

Since a few years, ruthenium- and iridium-based polypyridyl complexes are privileged photocatalysts in visible light photocatalysis. However, organic dyes should constitute a valuable alternative not only due to their relatively lower cost and wider availability but also by giving access to new transformations. The direct arylation of heteroarenes (e.g., furan, thiophene, and pyrrole)... 

Marin V, Holder E, Hoogenboom R, Schubert US (2004) Mixed iridium(in) and ruthenium (II) polypyridyl complexes containing poly(8-caprolactone)-bipyridine macroligands. J Polym Sci Part A Polym Chem 42 4153-4160... 

Rasmussen, S.C., Richter, M.M., Yi, E., Place, H. and Brewer, KJ. (1990) Synthesis and characterization of a series of novel rhodium and iridium complexes containing polypyridyl bridging ligands Potential uses in the development of multimetal catalysts for carbon dioxide reduction. Inorg. Chem., 29, 3926—3932. 

Flamigni, L., G. Marconi, I.M. Dixon, J.P Collin, and J.P Sauvage (2002). Switching of electron- to energy-transfer by selective excitation of different chromophores in arrays based on porphyrins and a polypyridyl iridium complex. J. Phys. Chem. B 106, 6663-6671. 

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