Abstract
Manganese–sulfur cluster anions (MnnS−m, n=1–10, m=1–10) have been studied using a magnetic-bottle type photoelectron spectroscopy (PES). The MnnS−m cluster anions were formed in a laser vaporization cluster source. The most stable cluster anions were found to have the compositions of n=m and n=m±1. The electron affinities of neutral manganese sulfide clusters were measured from the onsets of the PES spectra. A new electronically excited state at 0.75 eV above the ground state was found for MnS. From the size dependence of the PES spectra, it was found that Mn2S−2, Mn3S−3, and Mn4S−4 are structural frameworks in MnnS−2, MnnS−3, and MnnS−4 series, respectively. The electronic properties and geometrical structures of the clusters are discussed.
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