title: Experimental and theoretical studies of complexes of [Pb(m)Ag](-) (m = 1-4).
abstract: The metal clusters [Pb(m)Ag](-) (m = 1-4) are studied by photoelectron (PE) spectra and density functional theory (DFT). The adiabatic electron affinity (EA) and vertical detachment energy (VDE) of [Pb(m)Ag](-) are obtained from PE spectra at 308 nm. Theoretical calculation is carried out to search for the lowest-energy geometry and elucidate their structures and bonding mode. By comparing the theoretical results, including EA, VDE and simulated density of state (DOS) spectra, with the experimental determination, the lowest-energy structures for each species are obtained. The analysis of the molecular orbital composition provides evidence that the silver atom binds on lead clusters through an Ag-Pb sigma bond. Moreover, the clusters of [Pb(3)](2-), [Pb(4)](2+), Pb(4) and [Pb(4)](2-) are investigated for aromaticity.
authors: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 11602, China.
authors: Xiao-Jing
authors: XJ
authors: Liu
authors: Bin
authors: B
authors: Li
authors: Ke-Li
authors: KL
authors: Han
authors: Shu-Tao
authors: ST
authors: Sun
authors: Xiao-Peng
authors: XP
authors: Xing
authors: Zi-Chao
authors: ZC
authors: Tang