Synthesis and photophysical properties of linear gold(i) complexes based on a CCC carbene

Alexander S. Romanov; Mikko Linnolahti; Manfred Bochmann

doi:10.1039/d1dt03393j

Synthesis and photophysical properties of linear gold(i) complexes based on a CCC carbene

Alexander S. Romanov, Mikko Linnolahti, Manfred Bochmann

Materials Chemistry

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Abstract

The reaction between allenylpyridine (L1) and (Me2S)AuCl resulted in the quantitative formation of the (Indolizy)gold chloride complex 1 (Indolizy = indolizin-2-ylidene). The reaction of 1 with carbazole in the presence of KOtBu affords the corresponding (Indolizy)Au(Cz) complex 2. Both compounds show high air- and temperature stability. The crystal structure of 2 confirmed the linear co-planar geometry. Complex 1 shows an intense low energy absorption of mixed character in the UV-vis spectrum, ascribed to intraligand and (M + Hal)L charge transfer processes, and exhibits bright yellow phosphorescence with an excited state lifetime of 62.8 μs in the crystal and a luminescence quantum yield up to 65%. On the other hand, the carbazolate complex 2 in a polystyrene matrix shows bright red delayed fluorescence at 617 nm with a sub-microsecond excited state lifetime and a quantum yield of 21.6%.

Original language	English
Pages (from-to)	17156-17164
Number of pages	9
Journal	Dalton Transactions
Volume	50
Issue number	46
DOIs	https://doi.org/10.1039/d1dt03393j
Publication status	Published - 8 Nov 2021

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title = "Synthesis and photophysical properties of linear gold(i) complexes based on a CCC carbene",

abstract = "The reaction between allenylpyridine (L1) and (Me2S)AuCl resulted in the quantitative formation of the (Indolizy)gold chloride complex 1 (Indolizy = indolizin-2-ylidene). The reaction of 1 with carbazole in the presence of KOtBu affords the corresponding (Indolizy)Au(Cz) complex 2. Both compounds show high air- and temperature stability. The crystal structure of 2 confirmed the linear co-planar geometry. Complex 1 shows an intense low energy absorption of mixed character in the UV-vis spectrum, ascribed to intraligand and (M + Hal)L charge transfer processes, and exhibits bright yellow phosphorescence with an excited state lifetime of 62.8 μs in the crystal and a luminescence quantum yield up to 65%. On the other hand, the carbazolate complex 2 in a polystyrene matrix shows bright red delayed fluorescence at 617 nm with a sub-microsecond excited state lifetime and a quantum yield of 21.6%.",

author = "Romanov, {Alexander S.} and Mikko Linnolahti and Manfred Bochmann",

note = "Funding Information: This work was supported by the European Research Council and the Royal Society. M. B. is an ERC Advanced Investigator Award holder (grant no. 338944-GOCAT). A. S. R. acknowledges support from the Royal Society (grant no. URF\R1\180288 and RGF\EA\181008). M.L. acknowledges the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision 320166. (TD) DFT computations were made possible by use of the Finnish Grid and Cloud Infrastructure resources (urn:nbn:fi:research-infras-2016072533). Mass spectrometry data were obtained at the National Mass Spectrometry Facility at Swansea University. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2021",

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T1 - Synthesis and photophysical properties of linear gold(i) complexes based on a CCC carbene

AU - Romanov, Alexander S.

AU - Linnolahti, Mikko

AU - Bochmann, Manfred

N1 - Funding Information: This work was supported by the European Research Council and the Royal Society. M. B. is an ERC Advanced Investigator Award holder (grant no. 338944-GOCAT). A. S. R. acknowledges support from the Royal Society (grant no. URF\R1\180288 and RGF\EA\181008). M.L. acknowledges the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision 320166. (TD) DFT computations were made possible by use of the Finnish Grid and Cloud Infrastructure resources (urn:nbn:fi:research-infras-2016072533). Mass spectrometry data were obtained at the National Mass Spectrometry Facility at Swansea University. Publisher Copyright: © The Royal Society of Chemistry.

PY - 2021/11/8

Y1 - 2021/11/8

N2 - The reaction between allenylpyridine (L1) and (Me2S)AuCl resulted in the quantitative formation of the (Indolizy)gold chloride complex 1 (Indolizy = indolizin-2-ylidene). The reaction of 1 with carbazole in the presence of KOtBu affords the corresponding (Indolizy)Au(Cz) complex 2. Both compounds show high air- and temperature stability. The crystal structure of 2 confirmed the linear co-planar geometry. Complex 1 shows an intense low energy absorption of mixed character in the UV-vis spectrum, ascribed to intraligand and (M + Hal)L charge transfer processes, and exhibits bright yellow phosphorescence with an excited state lifetime of 62.8 μs in the crystal and a luminescence quantum yield up to 65%. On the other hand, the carbazolate complex 2 in a polystyrene matrix shows bright red delayed fluorescence at 617 nm with a sub-microsecond excited state lifetime and a quantum yield of 21.6%.

AB - The reaction between allenylpyridine (L1) and (Me2S)AuCl resulted in the quantitative formation of the (Indolizy)gold chloride complex 1 (Indolizy = indolizin-2-ylidene). The reaction of 1 with carbazole in the presence of KOtBu affords the corresponding (Indolizy)Au(Cz) complex 2. Both compounds show high air- and temperature stability. The crystal structure of 2 confirmed the linear co-planar geometry. Complex 1 shows an intense low energy absorption of mixed character in the UV-vis spectrum, ascribed to intraligand and (M + Hal)L charge transfer processes, and exhibits bright yellow phosphorescence with an excited state lifetime of 62.8 μs in the crystal and a luminescence quantum yield up to 65%. On the other hand, the carbazolate complex 2 in a polystyrene matrix shows bright red delayed fluorescence at 617 nm with a sub-microsecond excited state lifetime and a quantum yield of 21.6%.

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DO - 10.1039/d1dt03393j

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SN - 1477-9226

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SP - 17156

EP - 17164

JO - Dalton Transactions

JF - Dalton Transactions

IS - 46

ER -

Synthesis and photophysical properties of linear gold(i) complexes based on a CCC carbene

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