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Issue 10, 2018
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Aurophilicity vs. thiophilicity: directing the crystalline supramolecular arrangement in luminescent gold compounds

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Abstract

Herein, we study the influence of the fluorination of thiolate ligand backbones over the solid state crystalline supramolecular arrangement in a series of seven new dinuclear fluorophenylthiolate gold(I) coordination compounds. These compounds include the bridge ligand 1,2-bis(diphenylphosphine)ethane (dppe) and have the general formula [Au2(SRF)2(μ-dppe)] with SRF = SC6F5 (1); SC6HF4-4 (2); SC6H3F2-3,5 (3); SC6H3F2-2,4 (4); SC6H4(CF3)-2 (5); SC6H4F-3 (6) and SC6H4(CF3)-4 (7). By the analysis of X-ray crystalline structures, we found that the increase in the fluorination degree of the ligands reduces the incidence of aurophilic interactions and collaterally favours the formation of a secondary Au⋯S (thiophilic) interaction resulting in a rhomboidal planar (AuS)2 unit. This latter synthon recurrently competes with the expected Au–Au contacts. All the analysed compounds show visible photoluminescence in the solid state, indicating an aggregation-induced emissive behaviour, i.e. both the aurophilic and thiophilic interactions promote the emission of light by this family of gold complexes.

Graphical abstract: Aurophilicity vs. thiophilicity: directing the crystalline supramolecular arrangement in luminescent gold compounds

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Supplementary files

Article information


Submitted
15 Nov 2017
Accepted
12 Feb 2018
First published
12 Feb 2018

New J. Chem., 2018,42, 7845-7852
Article type
Paper

Aurophilicity vs. thiophilicity: directing the crystalline supramolecular arrangement in luminescent gold compounds

G. Moreno-Alcántar, G. Romo-Islas, M. Flores-Álamo and H. Torrens, New J. Chem., 2018, 42, 7845
DOI: 10.1039/C7NJ04354F

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