The synthesis and characterisation of europium terpyridine-N-oxide complexes.
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.
Amoroso
Angelo J
AJ
School of Chemistry, Cardiff University, P.O. Box 912, Cardiff, UK. amorosoaj@cf.ac.uk
Burrows
Miles W
MW
Haigh
Robert
R
Hatcher
Malcolm
M
Jones
Mark
M
Kynast
Ulrich
U
Malik
K M Abdul
KM
Sendor
Dorota
D
D002627:Chemistry, Physical / Q000379:methods; D018360:Crystallography, X-Ray / Q000379:methods; D005063:Europium / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D008968:Molecular Conformation; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010087:Oxides / Q000138:chemical synthesis* / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D013997:Time Factors
D008024:Ligands; D009942:Organometallic Compounds; D010087:Oxides; D011725:Pyridines; D005063:Europium