Photoelectron spectroscopy and ab initio calculations of small SinSm-(n=1,2; m=1-4) clusters

Binary cluster anions composed of silicon and sulfur elements, SinSm-(n = 1,2; m = 1-4), were investigated by using photoelectron spectroscopy and ab initio calculations. The vertical detachment energies and the adiabatic detachment energies of these clusters were obtained from their photoelectron spectra. The electron affinity of SinSm molecule is determined to be 0.477 +/- 0.040 eV. The results show that the most stable structures of the anionic and neutral SinSm (n = 1,2; m = 1-4) clusters prefer to adopt planar configurations except that the structures of Si2S4-and Si2S2 are slightly bent. (C) 2014 AIP Publishing LLC.