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Gold Bulletin

, Volume 34, Issue 1, pp 20–23 | Cite as

Design of luminescent sulfur-containing polynuclear gold(I) complexes for advanced nanomaterials and chemosensors

  • Vivian Wing-Wah Yam
  • Eddie Chung-Chin Cheng
Open Access
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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.

Keywords

Dppm Gold Bulletin Metal Chalcogenide Orange Emission Thiolate Complex 
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Copyright information

© World Gold Council 2001

Authors and Affiliations

  • Vivian Wing-Wah Yam
    • 1
  • Eddie Chung-Chin Cheng
    • 1
  1. 1.Department of ChemistryThe University of Hong KongHong KongPR China

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