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Sulfur K-Edge Absorption Spectra of Na2SO4, Na2SO3, Na2S2O3, and Na2S2O x ( x =5–8)

1986; Oxford University Press; Volume: 59; Issue: 2 Linguagem: Inglês

10.1246/bcsj.59.575

1348-0634

Hideo Sekiyama, Nobuhiro Kosugi, Haruo Kuroda, Toshiaki Ohta,

Solid-state spectroscopy and crystallography

Abstract X-Ray absorption spectra of the sulfur K-edges of SO42−, SO32−, S2O32−, and S2Ox2− (x=5–8) were measured with synchrotron radiation. The spectra show similarly strong absorption bands which originate in bound-state transitions to antibonding 3p-type orbitals and in shape resonances related to 3d-type orbitals. The K-edge spectrum for the terminal sulfur atom in S2O32−, however, shows only a bound-state transition. Differences in chemical environments and bonding around the X-ray absorbing atoms are discussed to interpret the spectra.