Carbene metal amide photoemitters: tailoring conformationally flexible amides for full color range emissions including white-emitting OLED

Romanov, Alexander, Jones, Saul, Gu, Qinying, Conaghan, Patrick, Drummond, Bluebell, Feng, Jiale, Chotard, Florian, Buizza, Leonardo, Foley, Morgan, Linnolahti, Mikko, Credgington, Dan and Bochmann, Manfred (2020) Carbene metal amide photoemitters: tailoring conformationally flexible amides for full color range emissions including white-emitting OLED. Chemical Science, 11 (2). pp. 435-446. ISSN 2041-6520

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Abstract

Conformationally flexible "Carbene-Metal-Amide" (CMA) complexes of copper and gold have been developed based on a combination of sterically hindered cyclic (alkyl)(amino)carbene (CAAC) and 6- and 7-ring heterocyclic amide ligands. These complexes show photoemissions across the visible spectrum with PL quantum yields of up to 89% in solution and 83% in host-guest films. Single crystal X-ray diffraction and photoluminescence (PL) studies combined with DFT calculations indicate the important role of ring structure and conformational flexibility of the amide ligands. Time-resolved PL shows efficient delayed emission with sub-microsecond to microsecond excited state lifetimes at room temperature, with radiative rates exceeding 10 6 s -1. Yellow organic light-emitting diodes (OLEDs) based on a 7-ring gold amide were fabricated by thermal vapor deposition, while the sky-blue to warm-white mechanochromic behavior of the gold phenothiazine-5,5-dioxide complex enabled fabrication of the first CMA-based white light-emitting OLED.

Item Type: Article
Additional Information: This journal is © The Royal Society of Chemistry 2020.
Uncontrolled Keywords: basis-sets,complexes,cu-i,design,emitters
Faculty \ School: Faculty of Science > School of Chemistry
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 14 Nov 2019 09:30
Last Modified: 21 Sep 2020 00:00
URI: https://ueaeprints.uea.ac.uk/id/eprint/72962
DOI: 10.1039/C9SC04589A

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