The synthesis and characterisation of europium terpyridine-N-oxide complexes |
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Authors: | Amoroso Angelo J Burrows Miles W Haigh Robert Hatcher Malcolm Jones Mark Kynast Ulrich Malik K M Abdul Sendor Dorota |
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Institution: | School of Chemistry, Cardiff University, P.O. Box 912, Cardiff, UK. amorosoaj@cf.ac.uk |
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Abstract: | Europium complexes of a series of terpyridine-N-oxide ligands have been prepared and structurally characterised by crystallographic studies. While the addition of three equivalents of terpyridine-1-oxide or terpyridine-1,1'-bisoxide results in complexes with nine co-ordinate tricapped trigonal prismatic or monocapped square antiprismatic geometries, respectively, three equivalents of the terpyridine-1,1',1'-trisoxide yields an unexpected 8 co-ordinate geometry. Luminescence studies of the three complexes in acetonitrile show a typical europium emission spectra, dominated by the (5)D(0)-(7)F(2) transition. While no simple trend in the relative quantum yields could be ascertained, the terpyridine-1-oxide complex was observed to have the most intense luminescence for this set of complexes. |
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