Photoinduced ligand isomerization in Dimethyl Sulfoxide Complexes of Ruthenium(II)

Smith, Matthew K., Gibson, John A., Young, Charles G., Broomhead, John A., Junk, Peter C., and Keene, F. Richard (2000) Photoinduced ligand isomerization in Dimethyl Sulfoxide Complexes of Ruthenium(II). European Journal of Inorganic Chemistry, 2000 (6). pp. 1365-1370.

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Abstract

Upon exposure to sunlight or UV irradiation, a DMSO solution of [Ru(bpy)2(DMSO)2]2+ (1) (bpy = 2,2’-bipyridine; DMSO = dimethyl sulfoxide) turns rapidly from yellow to red, but subsequently slowly reverts to yellow in the dark. The photochemical sequence is explained in terms of a photopromoted linkage isomerization of the DMSO ligands from Sto O-bound, with a relaxation back to the thermodynamically stable yellow S-bound form in the dark by an intermolecular mechanism. The ‘‘dark’’ reaction has been studied by UV/Vis spectrophotometry, NMR and IR spectroscopy. The S-bound ligation of DMSO in the yellow cation was established by Xray crystallographic studies of cis-[Ru(bpy)2(DMSO)2]-(CF3SO3)2.

Item ID: 8473
Item Type: Article (Refereed Research - C1)
Keywords: Dimethyl sulfoxide; isomerizations; photochemistry; Ruthenium
ISSN: 1099-0682
Date Deposited: 18 Feb 2010 00:30
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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