Probing the effect of beta-triketonates in visible and NIR emitting lanthanoid complexes

Laura Abad Galan, Brodie L. Reid, Stefano Stagni, Alexandre N. Sobolev, Brian W. Skelton, Evan G. Moore, Garry S. Hanan, Eli Zysman-Colman, Mark I. Ogden, Massimiliano Massi

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An isomorphous series of lanthanoid complexes containing tribenzoylmethanide (tbm) and 1,10-phenanthroline (phen) ligands has been synthesised and structurally characterised. These complexes, formulated as [Ln(phen)(tbm)(3)] (Ln = Eu3+, Er3+ and Yb3+), were compared with analogous dibenzoylmethanide (dbm) [Ln(phen)(dbm)(3)] complexes to investigate the effect of changing -diketonate to -triketonate ligands on the photophysical properties of the complex. The photophysical properties for the Eu3+ complexes were similar for both systems, whereas a modest enhancement was observed for Yb3+ and Er3+ moving from the dbm to the tbm complexes. A detailed study of the NIR photophysical properties was achieved by adapting the integrating sphere method for the calculation of overall quantum yields in the solid state.

Original languageEnglish
Pages (from-to)7956-7964
Number of pages9
JournalDalton Transactions
Issue number24
Publication statusPublished - 28 Jun 2018

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