Supramolecular assembly of diplatinum species through weak Pt ^II···Pt ^II intermolecular interactions: A combined experimental and computational study

Abstract:

The present study elucidates the factors that govern the spontaneous self-assembly of a family of dimetal [Pt 2L 4] (L=dithiocarboxylato ligand) complexes. Experimental data show that variables such as temperature, concentration, solvent and the nature of the ligand L have a critical effect on the reversible self-assembly of supramolecular [Pt 2L 4] n entities. In solution, new UV/Vis spectroscopic features emerge at low temperatures and/or high concentrations, which are attributed to the formation of oligomeric [Pt 2L 4] n species. The description of intermolecular Pt···Pt interactions, the main driving force for the association, was addressed from a computational perspective. The contributions from intermolecular Pt···S and S···S interactions to these supramolecular assemblies were found to be repulsive. Experimental UV/Vis data have been interpreted by means of computational spectroscopy. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Año de publicación:

2012

Keywords:

• Computational chemistry
• Supramolecular chemistry
• Platinum
• Density functional calculations
• metal-metal interactions

Fuente:

scopus

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