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 ORCID: https://orcid.org/0000-0001-7736-5428 (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
Uncontrolled Keywords:	basis-sets,complexes,cu-i,design,emitters
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
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	14 Nov 2019 09:30
Last Modified:	26 Jun 2024 11:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/72962
DOI:	10.1039/C9SC04589A

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