Nanosecond electron transfer dynamics between traps in zeolites studied by double-pulse excitation diffuse reflectance spectroscopy

Shuichi Takatani, Hiroshi Fukumura, Hiroshi Masuhara, Shuichi Hashimoto

研究成果: Article査読

15 被引用数 (Scopus)

抄録

The 248 nm excitation of zeolites results in the formation of trapped electrons which are very sensitive to photoexcitation and the amount of water contained in zeolites. Na43+, Na32+, and Na2+, which are prepared by 248 nm single-photon excitation, are directly confirmed as electron trapping states by nanosecond diffuse reflectance spectroscopy. Their stability decreases in the order of Na43+ > Na3+ < Na2+ in terms of the observed lifetimes of these trapped species. Water accelerates recombination between trapped electrons and the electron-ejected sites in the zeolite frameworks. Photoinduced conversion processes between these ion clusters were measured directly by double-pulse excitation experiments.

本文言語English
ページ(範囲)3365-3369
ページ数5
ジャーナルJournal of Physical Chemistry B
101
17
DOI
出版ステータスPublished - 1997 4月 24
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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