Abstract
Efficiently luminescent coordination polymers containing lanthanide ions (Eu3+, Tb3+, Dy3+) can be easily obtained using a suitable bisphosphonic ester from which a heterometallic version can be elaborated showing white light emission.
Highlights
Luminescent coordination polymers containing lanthanide ions (Eu3+, Tb3+, Dy3+) can be obtained using a suitable bisphosphonic ester from which a heterometallic version can be elaborated showing white light emission
The special benefit of the P(V)QO units as ligands towards lanthanide ions is their property to increase quantum yields of complexes compared to their carboxylic acid counterparts
The different luminescence behaviour of 1a compared with the other luminescent metal complexes 1b,c may be attributed to the higher ion potential of the Tb and Dy ions owing to their smaller size or the torsional difference of the biphenyl system in the corresponding coordination polymers
Summary
Luminescent coordination polymers containing lanthanide ions (Eu3+, Tb3+, Dy3+) can be obtained using a suitable bisphosphonic ester from which a heterometallic version can be elaborated showing white light emission. Coordination of L to a nonemissive metal center like yttrium such as in 1d leads to similar yet slightly red shifted (11 nm in excitation, 4 nm in emission) excitation and emission spectra with a still high emission quantum yield of 60%.
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