Journal
POLYHEDRON
Volume 62, Issue -, Pages 148-157Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2013.06.029
Keywords
Ruthenium terpyridene complexes; Crystal structures; Aqua ligand substitution; Activation parameters; Associative mechanism; Interaction with CT-DNA
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Funding
- University of Redlands
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Ruthenium complexes containing terpyridine or the 4'-substituted terpyridines and 2-(hydroxyphenyl)-benzoxazole (HPB) have been synthesized and characterized. The crystal structures of three of the complexes have been determined. All three complexes, trans-[Ru(tolylterpy)(HPB)(Cl)](PF6), cis-[Ru(toly-Iterpy)(HPB)(H2O)](PF6)(2) and cis-[Ru(terpy)(HPB)(NMI)](PF6) show a distorted octahedral geometry around the ruthenium center. The influence of the positional coordination of the phenolic oxygen of the HPB ligand on the spectrophotometric properties and the E-1/2 values of the complexes have been observed. The reaction of the aqua complexes with 1-methylimidazole (NMI), glutathione (GSH), purine and CT-DNA have been studied. Activation parameters for the reaction of 1-methylimidazole, glutathione and purine suggest that the substitution of the aqua ligand follow an associative mechanism. Spectrophotometric studies of the reactivity between CT-DNA and the aqua complexes indicate an interaction between the CT-DNA and the aqua complex. Published by Elsevier Ltd.
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