Photoelectron spectroscopy of transition metal-sulfur cluster anions

Atsushi Nakajima, Hiroshi Kawamata, Takasuke Hayase, Yuichi Negishi, Koji Kaya

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12 Citations (Scopus)

Abstract

Metal (M)-sulfur cluster anions (M = Ag, Fe and Mn) have been studied using photoelectron spectroscopy (PES) with a magnetic-bottle type time-of-flight electron spectrometer. The MnS-m cluster anions were formed in a laser vaporization cluster source. For Ag-S, the largest coordination number of Ag atoms (nmax) is generally expressed as nmax=2m-1 in each series of the number of S atoms (m). For Fe-S and Mn-S, it was found that the stable cluster ions are the ones with compositions of n = m and n = m±1. Their electron affinities were measured from the onset of the PES spectrum. For Ag-S, the EAs of Ag1Sm are small and around 1 eV, whereas those of AgnSm (n ≥ 2) become large above 2 eV. The features in the mass distribution and PES suggest that Ag2S unit is preferentially formed with increasing the number of Ag atoms. For Fe-S and Mn-S, the PES spectra of FenS-m/MnnS-m show a unique similarity at n ≥ m, indicating that the Fe/Mn atom addition to FenS-n/MnnS-n has little effect on the electronic property of FenSn/MnnSn. The PES spectra imply that the FenSn cluster is the structural framework of these clusters, as similarly as the determined structure of the FenSn cluster in nitrogenase enzyme.

Original languageEnglish
Pages (from-to)17-21
Number of pages5
JournalZeitschrift fur Physik D-Atoms Molecules and Clusters
Volume40
Issue number1
DOIs
Publication statusPublished - 1997 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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