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

Nobuyoshi Miyamoto, Kazuyuki Kuroda, Makoto Ogawa*

*この研究の対応する著者

研究成果: Article査読

59 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)4268-4274
ページ数7
ジャーナルJournal of Physical Chemistry B
108
14
DOI
出版ステータスPublished - 2004 4 8
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学

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