Abstract
A series of high-nuclearity gold(I) sulfido complexes with bridging diphosphine ligands have been synthesized and isolated, with the general formulae of [Au10(μ-P^P)4(μ3-S)4]X2 and [Au12(μ-P^P)4(μ3-S)4]X4 (P^P = diphosphine; X = PF6 or ClO4). Intense green and orange emissions were observed upon excitation at λ > 350 nm both in the solid state and in solutions. The green emission has been attributed to originate from excited states derived from the metal-perturbed intraligand (IL) transition while the orange emission arises from the ligand-to-metal-metal bond charge-transfer (LMMCT; S(Au...Au) states. The switching on and off of the LMMCT emission in a series of dinuclear gold(I) thiolate complexes with crown ether pendants induced by ion-binding has been demonstrated, and this provides a new strategy for the design of luminescence signalling and chemosensing devices in optoelectronics and sensor technology.
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Chemistry and is currently the Head of the Department of Chemistry at The University of Hong Kong. She has produced over 120 publications since 1987. Her research interests include the photophysics and photochemistry of transition metal complexes with electronic configurations of d6, d8 and d10, and their related applications in advanced materials and sensor technology. Eddie C-C Cheng studied for his PhD with Professor Yam on the synthesis and luminescence behaviour of polynuclear coinage metal chalcogenide and chalcogenolate complexes.
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Yam, V.WW., Cheng, E.CC. Design of luminescent sulfur-containing polynuclear gold(I) complexes for advanced nanomaterials and chemosensors. Gold Bull 34, 20–23 (2001). https://doi.org/10.1007/BF03214804
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DOI: https://doi.org/10.1007/BF03214804