Issue 46, 2021

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%.

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

Supplementary files

Article information

Article type
Paper
Submitted
07 okt 2021
Accepted
07 noy 2021
First published
08 noy 2021
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2021,50, 17156-17164

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

A. S. Romanov, M. Linnolahti and M. Bochmann, Dalton Trans., 2021, 50, 17156 DOI: 10.1039/D1DT03393J

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