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Trinuclear gold chains and octanuclear copper gyrobifastigia stabilized using a fluorinated pyridyl ligand
Vo Quang Huy Phan1, Mukundam Vanga1, Benjamin T Diroll2
1Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
Abstract:
The fluorinated pyridyl ligand [6-(CF3)-2-Py]- with gold(I) affords trinuclear Au3 assemblies that further organize into a supramolecular helical column through aurophilic interactions. Its chemistry with copper(I) is even more remarkable, leading to an unprecedented octanuclear copper-pyridyl cluster complex featuring a central Cu8 core with an approximate gyrobifastigium geometry. Solid powders of compounds {(6-(CF3)-2-Py)Au}3 and {(6-(CF3)-2-Py)Cu}8 exhibit intense photoluminescence at room temperature, displaying green and yellow colors to the naked eye, respectively. The octanuclear copper complex is also an effective catalyst for azide-alkyne cycloaddition, producing triazoles. Detailed computational analyses confirm the preference for experimental geometries and provide insights into the observed luminescence.
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