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Issue 14, 1993
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Synthesis, spectroscopy and excited-state redox properties of novel luminescent trinuclear three-co-ordinate gold(I) phosphine complexes

Abstract

Reaction of [Au3(dmmp)2][CIO4]3 with an excess of dmmp [bis(dimethylphosphinomethyl)methylphosphine] in methanol yielded [Au3(dmmp)3][CIO4]3 in almost quantitative yield. Excitation of a degassed acetonitrile solution of [Au3(dmmp)3]3+ at λ > 350 nm resulted in intense phosphorescence (λem= 625 nm, τ0= 2.2 ± 0.2 µs). A comparison between the electronic absorption and emission spectra of [Au3(dmmp)3]3+ and [Au2(dmpm)3]2+[dmpm = bis(dimethylphosphino)methane] has been made. The assignment of the lowest electronic excited state in the (AuP3)n system has been suggested to be 3[(dδ*)(pσ)]. The excited-state redox potentials of [Au3(dmmp)3]3+* and [Au2(dmpm)3]2+* have been determined through oxidative quenching experiments with a series of pyridinium acceptors of variable reduction potential.

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Article information


J. Chem. Soc., Dalton Trans., 1993, 2097-2100
Article type
Paper

Synthesis, spectroscopy and excited-state redox properties of novel luminescent trinuclear three-co-ordinate gold(I) phosphine complexes

V. W. Yam and W. Lee, J. Chem. Soc., Dalton Trans., 1993, 2097
DOI: 10.1039/DT9930002097

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