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Quantification of energy transfer in bimetallic Pt(ii)–Ln(iii) complexes featuring an N^C^N-cyclometallating ligand.

Etchells, Isaac M. and Pfrunder, Michael C. and Williams, J. A. Gareth and Moore, Evan G. (2019) 'Quantification of energy transfer in bimetallic Pt(ii)–Ln(iii) complexes featuring an N^C^N-cyclometallating ligand.', Dalton transactions., 48 (6). pp. 2142-2149.

Abstract

Cyclometallated Pt(II) complexes with arylpolypyridyl ligands have impressive photophysical properties (high quantum yields, long lifetimes and tuneable emission) which can be readily tuned by modification of the organic ligand. Despite this, few examples of cyclometallated Pt(II) complexes as sensitisers for Ln(III) emission have been reported. Herein, we report the photophysical properties for a series of bimetallic complexes incorporating an N^C^N-coordinated Pt(II) bearing an alkynyl terpyridine as a metalloligand for a Ln(III) ion (where Ln = Nd, Gd, Er, Yb and Lu). Using a combination of steady state, time-resolved, and transient absorption experiments, the influence on the photophysical properties of the metalloligand exerted by the different Ln(III) cations has been investigated, together with the energy transfer efficiency from the metalloligand to the Ln(III) 4f* excited state.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1039/C8DT04640A
Date accepted:08 January 2019
Date deposited:19 February 2019
Date of first online publication:08 January 2019
Date first made open access:08 January 2020

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