Application of circular dichroism spectroscopy in the study of mixed-valence asymmetric ruthenium polypyridyl complexes |
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| Authors: | Ahmed Hamid M Y Coburn Nadia Dini Danilo de Jong Jaap J D Villani Claudio Browne Wesley R Vos Johannes G |
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| Institution: | SCR for Solar Energy Conversion, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland. |
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| Abstract: | Circular dichroism (CD) spectroelectrochemistry is used to determine the extent of singly occupied molecular orbital delocalization in mixed-valence multinuclear complexes, specifically the mixed-valence Ru(II)Ru(III) states of the four diastereoisomers of (Ru(bpy)(2))(2)(bpt)](3+) 1; bpy = 2,2'-bipyridyl and bpt = 3,5-bis(pyrid-2'-yl)-1,2,4-triazolato anion]. The complex was found to be stable to thermal racemization in the three oxidation states, but photoracemization in the Ru(II)Ru(II) state was observed. |
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