Studies on mixed-valence compounds ( II ) - Electrochemical and in situ UV-vis-near-IR and FTIR spectroelectrochemical studies of mixed-valence heteropolyanion [HAs 2Mo 18O 62] n in aprotic media

Shu Yan Zhang, Hao Ran Sun, Guo Yu Yang, Ji Qing Xu

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Abstract

The mixed-valence heteropolyanion [HAs 2Mo 18O 62] n (n = 6, 7, 8, 9) were investigated by electrochemical and in-situ UV-Vis-Near-IR and FTIR spectroelectrochemical methods in aprotic media. The results indicate that the heteropolyanion [HAs 2Mo 18O 62] 5- with four step one electron transfer reductions and the mixed-valence heteropolyanions [HAs 2Mo 18O 62] n (n = 6, 7, 8, 9) were formed after electroreduction. The mixed-valence heteropolyanions have IVCT bands in Near-IR spectral region. The characteristic absorption of Mo = O double bond and the Mo - O bridge bond shift to low wavenumber after electroreduction.

Original languageEnglish
Pages (from-to)x28-776
JournalKao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities
Volume18
Issue number5
Publication statusPublished - 1997
Externally publishedYes

Keywords

  • Aprotic media
  • Electroreduction
  • In situ spectroelectrochemistry
  • Mixed-valence compound

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