Zwitterionic mixed-carbene coinage metal complexes: Synthesis, structures and photophysical studies

Chotard, Florian, Romanov, Alexander, Hughes, David, Linnolahti, Mikko and Bochmann, Manfred ORCID: https://orcid.org/0000-0001-7736-5428 (2019) Zwitterionic mixed-carbene coinage metal complexes: Synthesis, structures and photophysical studies. European Journal of Inorganic Chemistry, 2019 (39-40). pp. 4234-4240. ISSN 1434-1948

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Abstract

A series of three zwitterionic mixed-ligand bis(carbene) complexes of copper (1), silver (2) and gold (3) have been synthesized, based on a combination of ethyl-substituted cyclic (alkyl)(amino)carbene (Et2CAAC) and an anionic methyl-malonate-derived N-heterocyclic carbene (maloNHC). The crystal structures confirm the linear two-coordinate geometry without close intermolecular contacts. The compounds show blue-white phosphorescence consistent with a wide HOMO-LUMO energy gap (2.87–3.07 eV) estimated by cyclic voltammetry. The excited state lifetimes of crystalline powders decrease in the series Cu > Ag > Au, from 400 µs for copper 1 to 50 µs for the gold complex 3. DFT calculations indicate a large change in the transition dipole moment on excitation, of up to 16 D.

Item Type:	Article
Additional Information:	Special Issue: EuChemS Inorganic Chemistry Celebrates IYPT
Faculty \ School:	Faculty of Science > School of Chemistry
UEA Research Groups:	Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Chemistry of Materials and Catalysis
Depositing User:	LivePure Connector
Date Deposited:	18 Jun 2019 07:30
Last Modified:	22 Oct 2022 04:51
URI:	https://ueaeprints.uea.ac.uk/id/eprint/71440
DOI:	10.1002/ejic.201900573

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