Mixed metal supramolecular complexes

Swavey S, Brewer KJ. Visible light induced photocleavage of DNA by a mixed-metal supramolecular complex [ (bpy)2Ru(dpp)j2RhCl2]5+. Inorg Chem 2002 41 6196-8. 

Holder AA, Swavey S, Brewer KJ. Design aspects for the development of mixed-metal supramolecular complexes capable of visible light induced photocleavage of DNA. 

Mixed-Metal Supramolecular Complexes Coupling Polyazine Light Absorbers and Reactive Metal Centers... 

The electrochemical and photophysical properties of a variety of mixed-metal supramolecular complexes incorporating Ru(II)/Os(II)-polyazine LAs to reactive Rh(III) systems have been investigated. The coupling of Rh(III) to ruthenium and osmium chromophores has been explored in some detail due to the known energy and electron transfer quenching of MLCT states of ruthenium and osmium by Rh(III) complexes in bimolecular processes. The systems studied to date most frequently included tris(bidentate) or bis(tridentate) coordination on Rh(III). While these studies provide considerable insight into the intramolecular excited state dynamics, these coordination environments typically prevent reactivity at the rhodium site. 

The electrochemical and photophysical properties of a variety of mixed-metal supramolecular complexes incorporating Ru/Os(II)-polyazine LA to reactive Pt(II) systems have been investigated. Coupling a polyazine LA to a reactive Pt(II) center may impart both the rich redox and photophysical properties of the polyazine LA to the spectroscopic and reactive properties as well as the DNA binding ability of Pt(II). The use of a supramolecular design, allows component modification to enhance device function and light-absorbing properties. 

Few examples of mixed-metal supramolecular complexes incorporating multiple Ru(II) and Pt(II) centers have been reported. These systems use dpp or dpq BLs to couple Ru(II) and Pt(II) subunits. The BL provides electronic couphng of the bridged metals. 

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