Application of circular dichroism spectroscopy in the study of mixed-valence asymmetric ruthenium polypyridyl complexes

Hamid M Y Ahmed; Nadia Coburn; Danilo Dini; Jaap J D de Jong; Claudio Villani; Wesley R Browne; Johannes G Vos

doi:10.1021/ic200633a

Application of circular dichroism spectroscopy in the study of mixed-valence asymmetric ruthenium polypyridyl complexes

Inorg Chem. 2011 Jul 4;50(13):5861-3. doi: 10.1021/ic200633a. Epub 2011 May 31.

Authors

Hamid M Y Ahmed¹, Nadia Coburn, Danilo Dini, Jaap J D de Jong, Claudio Villani, Wesley R Browne, Johannes G Vos

Affiliation

¹ SCR for Solar Energy Conversion, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.

PMID: 21627089
DOI: 10.1021/ic200633a

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Circular Dichroism
Molecular Conformation
Organometallic Compounds / chemical synthesis
Organometallic Compounds / chemistry*
Oxidation-Reduction
Pyridines / chemistry*
Ruthenium / chemistry*

Substances

Organometallic Compounds
Pyridines
Ruthenium