Electrochromic Os-based metallo-supramolecular polymers: Electronic state tracking by: In situ XAFS, IR, and impedance spectroscopies

Takefumi Yoshida, Manas Kumar Bera, Yemineni S.L.V. Narayana, Sanjoy Mondal, Hitoshi Abe, Masayoshi Higuchi

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the electronic states of Os-based metallo-supramolecular polymers (poly(OsL)2+) during electrochromism were tracked by in situ X-ray absorption fine structure (XAFS), infrared (IR), and impedance spectroscopies. The XAFS spectra suggested electronic charge migration in the polymer, and the in situ spectra revealed reversible changes caused by electrochemical redox reactions. The IR spectra of the polymers showed an IVCT band, and we also confirmed the reversible changes by applying a voltage to the redox cell. During the impedance measurements, we found a drastic decrease in the charge transfer resistance (RCT) of the polymer films near the electrochemical redox potential.

Original languageEnglish
Pages (from-to)24691-24696
Number of pages6
JournalRSC Advances
Volume10
Issue number41
DOIs
Publication statusPublished - 2020 Jun 29
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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