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The isolation and secondary functionalisation of the mer- and fac-isomers of tris(5-hydroxymethyl-2,2′-bipyridine) complexes of ruthenium (II) by Rodney T. Brown; Nicholas C. Fletcher; Mark Nieuwenhuyzen; Tia E. Keyes is a Chemistry article available to read on EtoBox.

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Tris-chelate 5-hydroxymethyl-2,2 0 -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 merisomeric forms of the ester complexes were separated using preparative plate silica chromatography and characterised by 1 H 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.

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Author

Rodney T. Brown; Nicholas C. Fletcher; Mark Nieuwenhuyzen; Tia E. Keyes

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)