Synthesis of methylviologen-HTiNbO5 intercalation compound and its photochemical behavior

Teruyuki Nakato, Hirokatsu Miyata, Kazuyuki Kuroda, Chuzo Kato

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    A novel intercalation compound composed of layered titanoniobic acid (HTiNbO5) and methylviologen was synthesized and its photochemical behavior was investigated. Although methylviologen could not be intercalated into the interlayer region of titanoniobic acid directly, the intercalation compound was obtained by guest exchange with the propylammonium-HTiNbO5 intercalation compound. When the viologen intercalated compound was irradiated by UV light under an N2 atmosphere or under a vacuum, the compound turned blue. Visible spectroscopy and ESR indicated the formation of viologen radical cations. The phenomenon was thought to be due to the electron transfer from the oxygen-deficient layered oxide to the viologen. The oxidation of the viologen radical cations did not occur under O2-free conditions; therefore the oxygen was responsible for the bleaching.

    Original languageEnglish
    Pages (from-to)231-238
    Number of pages8
    JournalReactivity of Solids
    Volume6
    Issue number2-3
    DOIs
    Publication statusPublished - 1988

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    Viologens
    Intercalation compounds
    intercalation
    synthesis
    Positive ions
    Cations
    cations
    acids
    Oxygen
    Acids
    oxygen
    bleaching
    Bleaching
    Ultraviolet radiation
    Paramagnetic resonance
    interlayers
    electron transfer
    Spectroscopy
    Vacuum
    Oxides

    Cite this

    Synthesis of methylviologen-HTiNbO5 intercalation compound and its photochemical behavior. / Nakato, Teruyuki; Miyata, Hirokatsu; Kuroda, Kazuyuki; Kato, Chuzo.

    In: Reactivity of Solids, Vol. 6, No. 2-3, 1988, p. 231-238.

    Research output: Contribution to journalArticle

    Nakato, Teruyuki ; Miyata, Hirokatsu ; Kuroda, Kazuyuki ; Kato, Chuzo. / Synthesis of methylviologen-HTiNbO5 intercalation compound and its photochemical behavior. In: Reactivity of Solids. 1988 ; Vol. 6, No. 2-3. pp. 231-238.
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    abstract = "A novel intercalation compound composed of layered titanoniobic acid (HTiNbO5) and methylviologen was synthesized and its photochemical behavior was investigated. Although methylviologen could not be intercalated into the interlayer region of titanoniobic acid directly, the intercalation compound was obtained by guest exchange with the propylammonium-HTiNbO5 intercalation compound. When the viologen intercalated compound was irradiated by UV light under an N2 atmosphere or under a vacuum, the compound turned blue. Visible spectroscopy and ESR indicated the formation of viologen radical cations. The phenomenon was thought to be due to the electron transfer from the oxygen-deficient layered oxide to the viologen. The oxidation of the viologen radical cations did not occur under O2-free conditions; therefore the oxygen was responsible for the bleaching.",
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    AU - Kuroda, Kazuyuki

    AU - Kato, Chuzo

    PY - 1988

    Y1 - 1988

    N2 - A novel intercalation compound composed of layered titanoniobic acid (HTiNbO5) and methylviologen was synthesized and its photochemical behavior was investigated. Although methylviologen could not be intercalated into the interlayer region of titanoniobic acid directly, the intercalation compound was obtained by guest exchange with the propylammonium-HTiNbO5 intercalation compound. When the viologen intercalated compound was irradiated by UV light under an N2 atmosphere or under a vacuum, the compound turned blue. Visible spectroscopy and ESR indicated the formation of viologen radical cations. The phenomenon was thought to be due to the electron transfer from the oxygen-deficient layered oxide to the viologen. The oxidation of the viologen radical cations did not occur under O2-free conditions; therefore the oxygen was responsible for the bleaching.

    AB - A novel intercalation compound composed of layered titanoniobic acid (HTiNbO5) and methylviologen was synthesized and its photochemical behavior was investigated. Although methylviologen could not be intercalated into the interlayer region of titanoniobic acid directly, the intercalation compound was obtained by guest exchange with the propylammonium-HTiNbO5 intercalation compound. When the viologen intercalated compound was irradiated by UV light under an N2 atmosphere or under a vacuum, the compound turned blue. Visible spectroscopy and ESR indicated the formation of viologen radical cations. The phenomenon was thought to be due to the electron transfer from the oxygen-deficient layered oxide to the viologen. The oxidation of the viologen radical cations did not occur under O2-free conditions; therefore the oxygen was responsible for the bleaching.

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