Mononuclear and binuclear ruthenium(II) heteroleptic complexes based on 1,10-phenanthroline ligands

Autor:	Allal Bouskila, Edmond Amouyal, Alain Gaudemer, Bruno Drahi, Isabelle Sasaki
Rok vydání:	2004
Předmět:	Tris General Chemical Engineering Phenanthroline General Physics and Astronomy chemistry.chemical_element Bridging ligand General Chemistry Buffer solution Photochemistry Ruthenium chemistry.chemical_compound chemistry Excited state Polymer chemistry Amine gas treating Ground state
Zdroj:	Journal of Photochemistry and Photobiology A: Chemistry. 163:381-388
ISSN:	1010-6030
DOI:	10.1016/j.jphotochem.2004.01.007
Popis:	A series of mononuclear and binuclear ruthenium(II) heteroleptic complexes as potential sensitizers for DNA photocleavage has been synthesized and characterized. This series based on 1,10-phenanthroline (phen) ligands is of the type [Rux(phen)2x(L)]2x+ (x=1 or 2). L is dmbpy (dmbpy=4,4′-dimethyl-2,2′-bipyridine) or a bridging ligand of bis-bpy type linked by a polymethylene or polyamine chain (see Scheme 1). The spectroscopic and photophysical properties determined in Tris buffer and ethanol as well as the redox potentials are not affected by the complex nuclearity. Therefore, the two metallic sites of the binuclear complexes are not electronically coupled neither in the ground state nor in the excited state. The results also show that the luminescence properties of the complexes in Tris buffer solution are sensitive to the presence of amine functions in the linker chain. In particular, the 3 MLCT excited state is better stabilized in the case of the binuclear complex including three amine groups. Improvement of binding with the possibility of a double-interaction of these systems with DNA is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ea47e3c5e9bc6b0a47e5183873a0c47a https://doi.org/10.1016/j.jphotochem.2004.01.007 Zobrazit plný text záznamu Full Text from ScienceDirect