Journal
CHEMICAL SCIENCE
Volume 11, Issue 2, Pages 435-446Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sc04589a
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Funding
- European Research Council
- Royal Society [UF130278, RG140472, URF\R1\180288, RGF\EA\181008]
- Academy of Finland
- ERC [338944-GOCAT]
- EPSRC Cambridge NanoDTC [EP/L015978/1]
- Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN) [320166]
- EPSRC [EP/S005854/1] Funding Source: UKRI
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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.
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