Observation of charge bistability in quasi-one-dimensional halogen-bridged palladium complexes by X-ray absorption spectroscopy

Takefumi Yoshida, Shinya Takaishi, Shohei Kumagai, Hiroaki Iguchi, Mohammad Rasel Mian, Masahiro Yamashita

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We performed X-ray absorption fine structure (XAFS) measurements on three representative bromo-bridged palladium compounds. In the X-ray absorption near-edge structure (XANES) spectra, the averaged-valence (AV) compound, [Pd3+(dabdOH)2Br]Br2 (1: dabdOH = (2S,3S)-2,3-diaminobutane-1,4-diol), and the mixed-valence (MV) compound, [Pd2+(en)2][Pd4+(en)2Br2](ReO4)4 (2), showed significant differences in their spectra. In [Pd(en)2Br](Suc-C5)2·H2O (3: en = ethylenediamine, Suc-C5 = dipentylsulfosuccinate), which exhibits an MV-AV phase transition, on the other hand, the spectroscopic difference between below and above the phase transition temperature was hardly observed due to the subtle difference in the oxidation states. In the extended X-ray absorption fine structure (EXAFS) spectra, a clear difference in the Pd-Br correlation region was observed upon the phase transition.

Original languageEnglish
Pages (from-to)11628-11631
Number of pages4
JournalDalton Transactions
Volume48
Issue number31
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Inorganic Chemistry

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