論文

査読有り
2020年7月

Dual-Branched Dense Hexagonal Fe(II)-Based Coordination Nanosheets with Red-to-Colorless Electrochromism and Durable Device Fabrication

ACS APPLIED MATERIALS & INTERFACES
  • Sanjoy Mondal
  • ,
  • Yoshikazu Ninomiya
  • ,
  • Takefumi Yoshida
  • ,
  • Taizo Mori
  • ,
  • Manas Kumar Bera
  • ,
  • Katsuhiko Ariga
  • ,
  • Masayoshi Higuchi

12
28
開始ページ
31896
終了ページ
31903
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acsami.0c05921
出版者・発行元
AMER CHEMICAL SOC

Highly dense hexagonal Fe(II)-based coordination nanosheets (CONASHs) were designed by dual-branching, at the metal-coordination moieties and the tritopic ligands, which successfully obtained a liquid/liquid interface by the complexation of Fe(II) ions and the tritopic bidentate ligands. The 1:1 complexation was confirmed by titration. The obtained Fe(II)-based nanosheets were fully characterized by small-angle X-ray scattering (SAXS), atomic force microscopy (AFM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). A monolayer of the sheets was obtained, employing the Langmuir-Blodgett (LB) method, and the determined thickness was similar to 2.5 nm. The polymer nanosheets exhibited red-to-colorless electrochromism because the electrochemical redox transformation between Fe(II) and Fe (III) ions controlled the appearance/disappearance of the metal (ion)-to-ligand charge-transfer (MLCT) absorption. The poor pi-conjugation in the tritopic ligands contributed to the highly colorless electrochromic state. A solid-state device, with the robust polymer film, exhibited excellent electrochromic (EC) properties, with high optical contrast (Delta T > 65%) and high durability after repeated color changes for >15 000 cycles, upon applying low-operating voltages (+1.5/0 V).

リンク情報
DOI
https://doi.org/10.1021/acsami.0c05921
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000551488400085&DestApp=WOS_CPL
URL
https://pubs.acs.org/doi/pdf/10.1021/acsami.0c05921
ID情報
  • DOI : 10.1021/acsami.0c05921
  • ISSN : 1944-8244
  • eISSN : 1944-8252
  • Web of Science ID : WOS:000551488400085

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