2002年11月7日
Microscopic identification of a bimolecular reaction intermediate
Journal of Physical Chemistry B
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- ,
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- 巻
- 106
- 号
- 44
- 開始ページ
- 11549
- 終了ページ
- 11552
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/jp026253r
How a molecule impinging from an ambient phase attaches to and reacts with a preadsorbed reactant was studied by scanning tunneling microscopy (STM). A carboxylate (RCOO-) chemisorbed on a TiO2(110) surface was exchanged by another carboxylate (R′COO-) via an SN2-like mechanism when the RCOO--covered TiO2 surface was exposed to R′COOH vapor at room temperature or below. An R′COOH impinging from the gas phase was temporarily bound to a preadsorbed RCOO- yielding a bimolecular intermediate. The trapped R′COOH was inserted into the monolayer and dissociated to produce an adsorbed R′COO-. One of the carboxylates (RCOO- or R′COO-) was then pushed out of the monolayer to restore the intermediate and released to the vapor phase. The individual reaction steps were resolved using time-lapse imaging.
- リンク情報
- ID情報
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- DOI : 10.1021/jp026253r
- ISSN : 1089-5647
- SCOPUS ID : 0037038518