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Temperature‐Dependent Photophysical, Photochemical and Redox Properties of Novel Complexes (CO) 2 CpRu–Ru(L n )–RuCp(CO) 2 and (CO) 2 CpRu–Ru(L n )–SnPh 3 [L n = (CO) 2 ( N,N ′‐diisopropyl‐1,4‐diaza‐1,3‐butadiene)]
Author(s) -
van Slageren Joris,
Hartl František,
Stufkens Derk J.
Publication year - 2000
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(200005)2000:5<847::aid-ejic847>3.0.co;2-b
Subject(s) - chemistry , redox , ruthenium , homolysis , photochemistry , electrochemistry , raman spectroscopy , inorganic chemistry , catalysis , radical , organic chemistry , physics , optics , electrode
The photophysical, photochemical and redox properties of the title complexes were investigated. Resonance Raman measurements revealed the lowest‐energy electronic transition to possess σ→π* character. At low temperatures, long‐lived near‐IR emission was observed. Irradiation in solution results in homolytic splitting of a Ru–Ru bond as the primary step, followed by secondary reactions of the radical fragments depending on the experimental conditions. (Spectro)electrochemical investigations of the title species proved that the axial [RuCp(CO) 2 ] groups exert a stabilising influence on the corresponding radical cations, while destabilising the corresponding radical anions, compared to the redox behaviour of other ruthenium complexes of this type.