Photoionization efficiency curve measurements of alkali metal atom-methyl propiolate clusters: Observation of intracluster cyclotrimerization products

Hironori Tsunoyama, Fuminori Misaizu, Koichi Ohno

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Reaction products in clusters containing an alkali metal atom (M = Na, K, and Cs) and methyl propiolate (MP) molecules have been examined from results of photoionization efficiency (PIE) curve measurements. Two distinct humps were commonly observed in the PIE curves of Cs(MP)n for n ≥ 3, whereas a relatively smooth curve was obtained for n = 2. In the photoionization mass spectra of M(MP)n, an intensity anomaly at n = 3 was commonly observed as reported in the previous paper, which was due to a cyclotrimerization reaction producing a benzene derivative (trimethyl benzenetricarboxylate, BT). From the results of quantum chemical calculations for reacted and unreacted isomers, these two humps originate from two isomers with different ionization thresholds; the lower threshold is ascribed to a solvation-type isomer, Cs(MP)3, and the higher value comes from a reacted isomer composed of a cesium atom and a BT molecule. From the relative intensity of two isomers, the intracluster cyclotrimerization reaction producing BT is found to proceed efficiently in the present M-MP clusters.

本文言語English
ページ(範囲)5944-5949
ページ数6
ジャーナルJournal of Physical Chemistry A
108
28
DOI
出版ステータスPublished - 2004 7 15
外部発表はい

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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