Photophysical properties and crystal structures of luminescent phenylethynylgold(I) complexes of alkyl and aryl isocyanides
- 1 January 1996
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 18,p. 3699-3703
- https://doi.org/10.1039/dt9960003699
Abstract
Several phenylethynylgold(I) complexes were prepared by treating [{Au(CC–Ph)}∞] with 2,5-diisocyano-2,5-dimethylhexane (L1), (1,8-diisocyano-p-menthane (L2) and 2,6-dimethylphenyl isocyanide in dichloromethane. The intermolecular Au Au separations established by X-ray crystal analyses are 3.329(4), 3.565(2) and 3.485(3)Å for the crystals of [(Au(CCPh)(CNC6H3Me2-2,6)], [{Au(CCPh)}2L1] and [{Au(CCPh)}2L2] respectively. These gold(I) complexes have long-lived and emissive 3(ππ*) excited states in fluid solutions at room temperature. The photoredox properties of [Au(CCPh)(CNC6H3Me2-2,6)] have been studied by Stern–Volmer quenching experiments, and its excited-state redox potential E°(Au+–Au0*) is –1.62(1) V vs. saturated sodium chloride calomel electrode.Keywords
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