Solvent-induced intercluster rearrangements and the reversible luminescence responses in sulfide bridged gold(I)-silver(I) clusters.

Blue or yellow-green emission is observed from two different crystal types of the same gold(I)-silver(I) molecular cluster [SAu(3)Ag(L1)(3)](BF(4))(2) (L1 = 2-diphenylphosphino-4-methylpyridine) depending on the crystallization conditions; structural data suggest that intermolecular Au···Au interactions account for the luminescence vapochromic responses; a similar observation was made on two other pairs of analogues.