Brown, Rodney T. and Fletcher, Nicholas C. and Nieuwenhuyzen, Mark and Keyes, Tia E. (2005) The isolation and secondary functionalisation of the mer- and fac-isomers of tris(5-hydroxymethyl-2,2′-bipyridine) complexes of ruthenium (II). Inorganica Chimica Acta, 358 (4). pp. 1079-1088. ISSN 0020-1693
Full text not available from this repository.Abstract
Tris-chelate 5-hydroxymethyl-2,2′-bipyridine complexes of ruthenium (II) and the structurally related benzo- and naphthoesters have been isolated. The mer-isomer of the alcohol functionalised complex has been isolated by selective precipitation from methylene chloride and was subsequently functionalised to the benzoester with retention of the geometrical isomerism. The fac- and mer-isomeric forms of the ester complexes were separated using preparative plate silica chromatography and characterised by 1H NMR spectroscopy. X-ray structural analysis of the fac-isomer of both the ester complexes confirmed the product assignment. The photophysical properties of the three isomers were investigated, indicating very similar absorption spectra to [Ru(bipy)3]2+. The emission wavelength was comparable in each case, with the aromatic ester complexes giving a much longer lifetime and higher quantum yields