Luminescence color switching of supramolecular assemblies of discrete molecular decanuclear gold(I) sulfido complexes

Franky Ka-Wah HAU, Terence Kwok-Ming LEE, Eddie Chung-Chin CHENG, Ka Man Vonika AU, Vivian Wing-Wah YAM

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28 Citations (Scopus)

Abstract

A series of discrete decanuclear gold(I) μ3-sulfido complexes with alkyl chains of various lengths on the aminodiphosphine ligands, [Au₁₀{Ph₂PN(CnH₂n1)PPh₂}₄(μ₃-S)₄](ClO₄)₂, has been synthesized and characterized. These complexes have been shown to form supramolecular nanoaggregate assemblies upon solvent modulation. The photoluminescence (PL) colors of the nanoaggregates can be switched from green to yellow to red by varying the solvent systems from which they are formed. The PL color variation was investigated and correlated with the nanostructured morphological transformation from the spherical shape to the cube as observed by transmission electron microscopy and scanning electron microscopy. Such variations in PL colors have not been observed in their analogous complexes with short alkyl chains, suggesting that the long alkyl chains would play a key role in governing the supramolecular nanoaggregate assembly and the emission properties of the decanuclear gold(I) sulfido complexes. The long hydrophobic alkyl chains are believed to induce the formation of supramolecular nanoaggregate assemblies with different morphologies and packing densities under different solvent systems, leading to a change in the extent of Au(I)-Au(I) interactions, rigidity, and emission properties. Copyright © 2014 PNAS.

Original languageEnglish
Pages (from-to)15900-15905
JournalProceedings of the National Academy of Sciences of the United States of America
Volume111
Issue number45
Early online date01 Oct 2014
DOIs
Publication statusPublished - 11 Nov 2014

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Luminescence
Gold
Color
Transmission Electron Microscopy
Electron Scanning Microscopy
Ligands

Citation

Hau, F. K.-W., Lee, T. K.-M., Cheng, E. C.-C., Au, V. K.-M., & Yam, V. W.-W. (2014). Luminescence color switching of supramolecular assemblies of discrete molecular decanuclear gold(I) sulfido complexes. Proceedings of the National Academy of Sciences of the United States of America, 111(45), 15900-15905. doi: 10.1073/pnas.1418824111

Keywords

  • Luminescence
  • Color switching
  • Nanoaggregate
  • Gold cluster