Highly photoluminescent copper carbene complexes based on prompt rather than delayed fluorescence

Alexander S. Romanov; Dawei Di; Le Yang; Julio Fernandez-Cestau; Ciaran R. Becker; Charlotte E. James; Bonan Zhu; Mikko Linnolahti; Dan Credgington; Manfred Bochmann

doi:10.1039/C6CC02349E

Highly photoluminescent copper carbene complexes based on prompt rather than delayed fluorescence†

Alexander S. Romanov,^a Dawei Di,^b Le Yang,^b Julio Fernandez-Cestau,^a Ciaran R. Becker,^a Charlotte E. James,^a Bonan Zhu,^b Mikko Linnolahti,*^c Dan Credgington*^b and Manfred Bochmann*^a

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* Corresponding authors

^a School of Chemistry, University of East Anglia, Earlham Road, Norwich, UK
E-mail: m.bochmann@uea.ac.uk

^b Department of Physics, Cavendish Laboratory, Cambridge University, Cambridge CB3 0HE, UK

^c Department of Chemistry, University of Eastern Finland, Joensuu Campus, FI-80101 Joensuu, Finland

Abstract

Linear two-coordinate copper complexes of cyclic (alkyl)(amino)carbenes (CAAC)CuX (X = halide) show photoluminescence with solid-state quantum yields of up to 96%; in contrast to previously reported Cu photoemitters the emission is independent of temperature over the range T = 4–300 K and occurs very efficiently by prompt rather than delayed fluorescence, with lifetimes in the sub-nanosecond range.

This article is part of the themed collection: Celebrating the 2017 RSC Prize and Award Winners

Chemical Communications

Highly photoluminescent copper carbene complexes based on prompt rather than delayed fluorescence†

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