Weak acids enhance halogen activation on atmospheric waters surfaces

Sayaka Hayase, Akihiro Yabushita, Masahiro Kawasaki, Shinichi Enami, Michael R. Hoffmann, Agustín J. Colussi

研究成果: Contribution to journalArticle査読

34 被引用数 (Scopus)

抄録

We report that rates of I2(g) emissions, measured via cavity ring-down spectroscopy, during the heterogeneous ozonation of interfacial iodide: I-(surface, s) + O3(g) + H+(s) →→ I2(g), are enhanced several-fold, whereas those of IO · (g) are unaffected, by the presence of undissociated alkanoic acids on water. The amphiphilic weak carboxylic acids appear to promote I2(g) emissions by supplying the requisite interfacial protons H+(s) more efficiently than water itself, at pH values representative of submicrometer marine aerosol particles. We infer that the organic acids coating aerosol particles ejected from oceans topmost films should enhance I2(g) production in marine boundary layers.

本文言語英語
ページ(範囲)4935-4940
ページ数6
ジャーナルJournal of Physical Chemistry A
115
19
DOI
出版ステータス出版済み - 5 19 2011
外部発表はい

All Science Journal Classification (ASJC) codes

  • 物理化学および理論化学

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