title: Application of circular dichroism spectroscopy in the study of mixed-valence asymmetric ruthenium polypyridyl complexes.
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.
authors.affiliation: SCR for Solar Energy Conversion, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
authors.forename: Hamid M Y
authors.initials: HM
authors.lastname: Ahmed
authors.forename: Nadia
authors.initials: N
authors.lastname: Coburn
authors.forename: Danilo
authors.initials: D
authors.lastname: Dini
authors.forename: Jaap J D
authors.initials: JJ
authors.lastname: de Jong
authors.forename: Claudio
authors.initials: C
authors.lastname: Villani
authors.forename: Wesley R
authors.initials: WR
authors.lastname: Browne
authors.forename: Johannes G
authors.initials: JG
authors.lastname: Vos
mesh_terms: D002942:Circular Dichroism; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010084:Oxidation-Reduction; D011725:Pyridines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D011725:Pyridines; D012428:Ruthenium