Carbazole functionalized luminescent silver(I), gold(I) and gold(III)–N-heterocyclic carbene complexes: a new synthetic disproportionation approach towards Au(I)–NHC to provide Au(III)–NHC

doi:10.1039/C2NJ40740J

Paper

Carbazole functionalized luminescent silver(I), gold(I) and gold(III)–N-heterocyclic carbene complexes: a new synthetic disproportionation approach towards Au(I)–NHC to provide Au(III)–NHC

Published Jan 21, 2013 · J. Dinda, Sirsendu Das Adhikary, S. Seth

New Journal of Chemistry

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Abstract

Synthetic, structural and photophysical properties of carbazole functionalized novel procarbenic species 1-(methyl/picolyl)-3-(N-ethylcarbazolyl)-1H benzimidazoliumhexaflurophosphate (1 and 2) and their N-heterocyclic carbene (NHC) complexes of Ag(I) (3 and 4), Au(I) (5 and 6) and Au(III) (7 and 8) are described. According to the solid-state structures, a linear coordination geometry of Ag(I)–NHC (4) and Au(I)–NHC (6) has been established by X-ray diffraction studies; whereas the Au(III)–NHC complex (7) adopts the square planar geometry. The Au(III)–NHC (7 and 8) complexes have been synthesized from Au(I)–NHC (5 and 6) by capitalizing on a novel disproportionation protocol. Furthermore, the Au–Ccarbene bonds in complexes 7 and 8 are inert towards changes in the oxidation state of the metal atom. All the proligands (1 and 2) and complexes (3–8) are luminescent at room temperature.

Study Snapshot

Carbazole functionalized luminescent silver(I), gold(I) and gold(III)-N-heterocyclic carbene complexes show promising potential for efficient and environmentally friendly production of metal-free luminescent materials.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Carbazole functionalized luminescent silver(I), gold(I) and gold(III)–N-heterocyclic carbene complexes: a new synthetic disproportionation approach towards Au(I)–NHC to provide Au(III)–NHC

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References

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The synthesized [AuCl3(NHC)] complexes show electronic and structural differences with related organogold(I/III) congeners, allowing for comparisons with related complexes.

Citations

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