Visible Light Induced Electron Transfer and Long-Lived Charge Separated State in Cyanine Dye/Layered Titanate Intercalation Compounds

Nobuyoshi Miyamoto, Kazuyuki Kuroda, Makoto Ogawa

    Research output: Contribution to journalArticle

    55 Citations (Scopus)

    Abstract

    Visible light induced guest-to-host electron transfer and formation of long-lived charge separated state were demonstrated in cyanine dye/layered titanate intercalation compounds. 1,1′-Diethyl-2,2′-cyanine (dye-1) and 5,5′-dichloro-3,3′,9-triethyl-thiacarbocyanine (dye-2) were intercalated into layered titanates, CsxTi 2-x/4x/4O4 (□ = vacancy, x = 0.7) and Na2Ti3O7, by cation exchange reactions with alkylammonium-exchanged forms as the intermediates. The formation of the intercalation compounds was confirmed by XRD, elemental analysis, and visible absorption and fluorescence spectroscopies. The intercalated dyes formed J-aggregates in the interlayer spaces for all the dye/titanate systems. The visible light induced electron transfer was shown by the appearance of ESR signal, which was ascribed to the radical dications of the dyes, and by the quenching of the fluorescence of the dye aggregates. Apparent lifetimes of the charge separated states were estimated from the decay curve of the ESR signal. The charge separated state was most stable in the dye-2/CsxTi 2-x/4x/4O4system with the lifetime of 246 min among four tested compounds.

    Original languageEnglish
    Pages (from-to)4268-4274
    Number of pages7
    JournalJournal of Physical Chemistry B
    Volume108
    Issue number14
    Publication statusPublished - 2004 Apr 8

    Fingerprint

    Intercalation compounds
    intercalation
    electron transfer
    Coloring Agents
    Dyes
    dyes
    Electrons
    Paramagnetic resonance
    Fluorescence spectroscopy
    Absorption spectroscopy
    Vacancies
    Cations
    Quenching
    titanates
    life (durability)
    fluorescence
    Fluorescence
    interlayers
    Ion exchange
    absorption spectroscopy

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry

    Cite this

    Visible Light Induced Electron Transfer and Long-Lived Charge Separated State in Cyanine Dye/Layered Titanate Intercalation Compounds. / Miyamoto, Nobuyoshi; Kuroda, Kazuyuki; Ogawa, Makoto.

    In: Journal of Physical Chemistry B, Vol. 108, No. 14, 08.04.2004, p. 4268-4274.

    Research output: Contribution to journalArticle

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