PHOTOELECTRON SPECTROSCOPY OF BINARY-METAL CLUSTER ANIONS CONTAINING SULFUR ATOM

A. Nakajima, T. Taguwa, K. Nakao, K. Hoshino, S. Iwata and K. Kaya
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A. Nakajima: RIKEN, The Institute of Physical and Chemical Research, Wako, 351-01, Japan;
T. Taguwa: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan
K. Nakao: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan
K. Hoshino: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan
S. Iwata: Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
K. Kaya: RIKEN, The Institute of Physical and Chemical Research, Wako, 351-01, Japan;

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 417-421

Abstract: Photoelectron spectra of$M_n {\rm S}_1^-$(M=Al, Cu, Ag, and Au) cluster anions were measured at the photon energies of 3.49 and 4.66 eV using a magnetic-bottle electron spectrometer having ~60-meV resolution. The electron affinities of AlS−, CuS−, AgS−, and AuS−are 2.60(3), 2.10(3), 2.09(3), and 2.44(3) eV, respectively. The large EA of AlS−is attributed to large stability by six bonding electrons, and a new electronic state ofA′ 2Πcan be found 0.4 eV above the AlS ground state, which is in agreement with a theoretical calculation. In the photoelectron spectrum of AuS−, two peaks due to a splitting by the L–S coupling could be observed, and the amount of the splitting is 0.18(2) eV. The results of aluminum clusters containing sulfur atom will also be presented.

Date: 1996
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DOI: 10.1142/S0218625X96000759

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