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Issue 34, 2017
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Phosphorescent mechanochromism through the contraction of Ag12Cu2 clusters in tetradecanuclear copper–silver acetylide complexes

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Abstract

Tetraphosphine-supported tetradecanuclear Ag12Cu2 acetylide cluster complexes were prepared and characterized by X-ray crystallography. They show reversible phosphorescent mechanochromism with striking emission colour change from yellow to orange-red. As demonstrated by the drastic phosphorescent emission red-shifts of the Ag12Cu2 cluster complexes in a dilute PMMA (polymethyl methacrylate) blend upon mechanical grinding, the mechanochromism is ascribed to the contraction within the Ag12Cu2 cluster and the enhanced intramolecular Cu–Ag and Ag–Ag contacts. A mechanism of phosphorescent mechanochromism through metal intra-cluster contraction is thus proposed.

Graphical abstract: Phosphorescent mechanochromism through the contraction of Ag12Cu2 clusters in tetradecanuclear copper–silver acetylide complexes

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Publication details

The article was received on 18 Jul 2017, accepted on 02 Aug 2017 and first published on 03 Aug 2017


Article type: Paper
DOI: 10.1039/C7TC03205F
Citation: J. Mater. Chem. C, 2017,5, 8782-8787
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    Phosphorescent mechanochromism through the contraction of Ag12Cu2 clusters in tetradecanuclear copper–silver acetylide complexes

    X. Zhang, J. Wang, D. Qiao and Z. Chen, J. Mater. Chem. C, 2017, 5, 8782
    DOI: 10.1039/C7TC03205F

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