DFT study of ligand binding to small gold clusters satyende

Satyender Goel, Kirill A.Velizhanin, Andrei Piryatinski, Sergei Tretiak, Sergei A. Ivanov

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The influence of ligands on electronic structure of small gold clusters (Au2, Au4) has been investigated by density functional theory (DFT). Specifically,we study the effect of bonding of four donor ligands (NH3, NMe3, PH3, and PMe3) on cluster geometries and energetics in gas phase and in solution. Performance of five generations of DFT functionals and five different basis sets is assessed. Our results benchmark the importance of the DFT functional model and polarization functions in the basis set for calculations of ligated gold cluster systems. We obtain NMe3 ∼ NH3<PH3<PMe3 order of ligand binding energies and observe shallowpotential energy surfaces in all molecules. The latter is likely to lead to a conformational freedom in larger clusters with many ligands in solution at ambient conditions. The study suggests appropriate quantum-chemical methodology to reliably model small noble metal clusters in a realistic ligand environment typically present in experiments.

Original languageEnglish (US)
Pages (from-to)927-931
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume1
Issue number6
DOIs
StatePublished - Mar 18 2010

Keywords

  • General theory
  • Molecular structure
  • Quantum chemistry

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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