Article ID Journal Published Year Pages File Type
1227974 Microchemical Journal 2010 5 Pages PDF
Abstract

The known compounds N-(2,4-dinitrophenyl)-4,4′-bipyridinium (2,4-DNPhQ+), N-phenyl-4,4′-bipyridinium (PhQ+) and N-(4-acetylphenyl)-4,4′-bipyridinium (4-AcPhQ+) have been used to prepare a series of ruthenium complexes of the type [RuCl(CO)(PPh3)2(L)] (where, L = 2,4-DNPhQ+ or PhQ+ or 4-AcPhQ+). The latter complexes reacted with sulphur derivative to give [RuCl(CO)(PPh3)2(L)(L′)] (where, L′ = thio-9-xanthone). These new ruthenium complexes display intense, visible metal-to-ligand charge-transfer (MLCT) absorptions, due to dπ(Ru) → π*(pyridinium) excitations. The MLCT energy decreases as the acceptor strength increases in the order PhQ+ < 4-AcPhQ+ < 2,4-DNPhQ+. The new ruthenium complexes have been characterized by using standard analytical and spectroscopic techniques. Fluorescence and antibacterial activity of the ligands and appropriate complexes has also been carried out.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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