Photoresponsive Nanosheets of Polyoxometalates Formed by Controlled Self-Assembly Pathways

Keita Ishiba, Takao Noguchi, Hiroaki Iguchi, Masa Aki Morikawa, Kenji Kaneko, Nobuo Kimizuka

    研究成果: ジャーナルへの寄稿学術誌査読

    35 被引用数 (Scopus)

    抄録

    Anionic Keggin polyoxometalates (POMs) and ether linkage-enriched ammonium ions spontaneously self-assemble into rectangular ultrathin nanosheets in aqueous media. The structural flexibility of the cation is essential to form oriented nanosheets; as demonstrated by single-crystal X-ray diffraction measurements. The difference in initial conditions exerts significant influence on selecting for self-assembly pathways in the energy landscape. Photoillumination of the POM sheets in pure water causes dissolution of reduced POMs, which allowed site-specific etching of nanosheets using laser scanning microscopy. By contrast, photoetching was suppressed in aqueous AgNO3 and site-selective deposition of silver nanoparticles occurred as a consequence of electron transfer from the photoreduced POMs to Ag+ ions on the nanosheet surface.

    本文言語英語
    ページ(範囲)2974-2978
    ページ数5
    ジャーナルAngewandte Chemie - International Edition
    56
    11
    DOI
    出版ステータス出版済み - 3月 6 2017

    !!!All Science Journal Classification (ASJC) codes

    • 触媒
    • 化学 (全般)

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