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Issue 32, 2016
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A homoleptic, all-alkynyl-stabilized highly luminescent Au8Ag8 cluster with a single crystal X-ray structure

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Abstract

A homoleptic, all-alkynyl-stabilized [Au8Ag8(ArC[triple bond, length as m-dash]C)16] (1, Ar = 3,5-di-tert-butylphenyl) cluster was synthesized and characterized with a single crystal X-ray structure. Reactions of 3,5-di-tert-butyl-phenylacetylene with Ag(I) and Au(I) gave [Ag(ArC[triple bond, length as m-dash]C)]n and Au(PPh3)(ArC[triple bond, length as m-dash]C), respectively, where both have unusually high solubility in nonpolar organic solvents. In addition to drastically increased solubility, the two bulky tert-butyl substituents on the phenyl ring can confine the metal core to a certain size by preventing infinite aggregation of d10 metals. This feature makes the isolation of an all-alkynyl-stabilized Au–Ag cluster possible. Complex 1 is intensely luminescent with a very high quantum yield of 0.67 in solution at room temperature. Theoretical studies offered valuable insights into the intriguing photophysical properties, and revealed the significant role of metal–alkynyl bond interactions and enhanced molecular rigidity provided by tert-butyl groups.

Graphical abstract: A homoleptic, all-alkynyl-stabilized highly luminescent Au8Ag8 cluster with a single crystal X-ray structure

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Publication details

The article was received on 01 Jun 2016, accepted on 19 Jul 2016 and first published on 19 Jul 2016


Article type: Paper
DOI: 10.1039/C6DT02187E
Dalton Trans., 2016,45, 12772-12778

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    A homoleptic, all-alkynyl-stabilized highly luminescent Au8Ag8 cluster with a single crystal X-ray structure

    R. Zhang, C. Zhao, X. Li, Z. Zhang, X. Ai, H. Chen and R. Cao, Dalton Trans., 2016, 45, 12772
    DOI: 10.1039/C6DT02187E

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