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D → f energy transfer in heteronuclear Ir(III)/Ln(III) near-infrared luminescent complexes

Jana, Atanu, Pope, Simon and Ward, Michael D. 2017. D → f energy transfer in heteronuclear Ir(III)/Ln(III) near-infrared luminescent complexes. Polyhedron 127 , pp. 390-395. 10.1016/j.poly.2017.02.016

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Abstract

A series of d/f dinuclear complexes Ir•Ln [where Ln = Eu(III), Gd(III), Yb(III) and Nd(III)] are reported. The core structure consists of a rigid skeleton containing two different types of receptor site in a single molecular motif designed to combine a transition metal ion [Ir(III)] and a lanthanide ion [Ln(III)] in different binding sites at either end of fully conjugated bridge to facilitate d → f energy-transfer following photoexcitation of the Ir(III)-based antenna unit. Steady state and time-resolved photophysical experiments on these compounds revealed that the energy-transfer is feasible only in case of Ir•Yb and Ir•Nd systems, affording sensitized emission from the Yb(III) or Nd(III) centres. Such EnT is not possible in the Ir•Eu dyad as the excited state energy of the Ir(III) unit is insufficient to sensitise the excited state of the Eu(III) centre.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Iridium; Neodymium; Ytterbium; Luminescence; Energy-transfer
Publisher: Elsevier
ISSN: 0277-5387
Date of First Compliant Deposit: 4 May 2017
Date of Acceptance: 12 February 2017
Last Modified: 25 Apr 2018 08:28
URI: http://orca.cf.ac.uk/id/eprint/100314

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