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Issue 76, 2015
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Controlling intermolecular aurophilicity in emissive dinuclear Au(i) materials and their luminescent response to ammonia vapour

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Abstract

The concept that hydrogen bonding cations can reduce the coulombic repulsion inherent to anionic gold species and thereby trigger aurophilicity is realized with three new photoluminescent compounds of the form [Q]2[Au2(i-mnt)2] (i-mnt = (CN)2C[double bond, length as m-dash]CS22−, Q = 3,5-dimethylpyrazolium, piperidinium). These compounds illustrate unprecedented supramolecular aurophilicity between the anions, the emission of which is significantly red-shifted compared to zero-dimensional analogues, a direct result of the aurophilic network. The piperidinium salt exhibits a vapochromic/luminescent response to ammonia, inducing a change in colour of the reflectance and emission from red to yellow. These results demonstrate the ability to rationally control the formation of supramolecular metallophilic networks via the incorporation of hydrogen bonding cations.

Graphical abstract: Controlling intermolecular aurophilicity in emissive dinuclear Au(i) materials and their luminescent response to ammonia vapour

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The article was received on 27 Jun 2015, accepted on 23 Jul 2015 and first published on 27 Aug 2015


Article type: Communication
DOI: 10.1039/C5CC05277G
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Chem. Commun., 2015,51, 14299-14302

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    Controlling intermolecular aurophilicity in emissive dinuclear Au(I) materials and their luminescent response to ammonia vapour

    R. J. Roberts, D. Le and D. B. Leznoff, Chem. Commun., 2015, 51, 14299
    DOI: 10.1039/C5CC05277G

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