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The complex [{Au(PPh 3 )} 2 (8-qnS)]BF 4 (8-qnS = quinoline-8-thiolate) with intramolecular gold(I)...gold(I) distances of 2.991(2) and 3.081(2) Å in two independent asymmetric units, shows a long-lived emission at 640 nm which is quenched by polar solvents such as acetonitrile and alcohol.
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Tzeng et al. (1997) studied this question.
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