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

Laura Abad Galán; 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

doi:10.1039/C8DT00945G

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

Laura Abad Galán,^ab Brodie L. Reid,^a Stefano Stagni,

^b Alexandre N. Sobolev,^c Brian W. Skelton,^c Evan G. Moore,^d Garry S. Hanan,

^e Eli Zysman-Colman,

*^f Mark I. Ogden

*^a and Massimiliano Massi

*^a

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* Corresponding authors

^a School of Molecular and Life Science, and Curtin Institute for Functional Molecules and Interfaces, Curtin University, Kent Street, Bentley, 6102 WA, Australia
E-mail: m.massi@curtin.edu.au, m.ogden@curtin.edu.au

^b Department of Industrial Chemistry “Toso Montanari” – University of Bologna, viale del Risorgimento 4, Bologna 40136, Italy

^c School of Molecular Sciences, M310, University of Western Australia, Crawley, 6009 WA, Australia

^d School of Chemistry and Molecular Biosciences, University of Queensland, St Lucia 4072 QLD, Australia

^e Department of Chemistry, D-600 Université de Montréal, 2900 Edouard-Montpetit Montréal, Quebec, Canada

^f Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK
E-mail: eli.zysman-colman@st-andrews.ac.uk

Abstract

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 β-diketonate to β-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.

Dalton Transactions

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

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

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