Author:

Keywords:

neutral and anionic transition metal doped silver clusters, density functional theory, geometric and electronic structures, magnetic moment, simple metal-clusters, configuration-interaction, molecular-dynamics, density, physics, stability, energies, ag-n(-), cations, model, Science & Technology, Physical Sciences, Chemistry, Physical, Physics, Atomic, Molecular & Chemical, Chemistry, Physics, SIMPLE METAL-CLUSTERS, CONFIGURATION-INTERACTION, MOLECULAR-DYNAMICS, DENSITY, PHYSICS, STABILITY, ENERGIES, AG-N(-), CATIONS, MODEL, 02 Physical Sciences, 03 Chemical Sciences, 09 Engineering, Chemical Physics, 34 Chemical sciences, 40 Engineering, 51 Physical sciences

Abstract:

Density functional theory (DFT) has been applied to investigate the low-lying electronic states of neutral and anionic transition metal doped silver clusters Ag5X0,- with X = Sc, Ti, V, Cr, Mn, Fe, Co, and Ni using the B3LYP functional with the Stuttgart SDD basis sets. The structural features, frontier orbital energy gaps (HOMO and LUMO), vertical detachment energies, and vertical and adiabatic electronic affinities are evaluated. For all doped silver clusters, both in neutral and anionic states, two-dimensional and three-dimensional low-energy isomers are found to coexist. For neutral clusters, dopant Sc, Ti, V, and Mn atoms largely decrease the frontier orbital energy gaps, while they are markedly increased by Sc and Fe atoms in the anionic clusters. A completely quenched dopant magnetic moment is found in Ag5Sc, while high spin magnetic moments are located on the other dopant atoms in Ag5X0,-. (c) 2006 Elsevier B.V. All rights reserved.