PROTONATED ACETALDEHYDE CLUSTERS - STABILITY, STRUCTURE AND METASTABLE UNIMOLECULAR DECOMPOSITION

被引：31

作者：

TZENG, WB

WEI, S

CASTLEMAN, AW

机构：

[1] The Pennsylvania State University, Department of Chemistry, University Park

来源：

CHEMICAL PHYSICS LETTERS | 1990年 / 168卷 / 01期

关键词：

D O I：

10.1016/0009-2614(90)85097-V

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Neutral acetaldehyde clusters, prepared in a pulsed nozzle supersonic expansion, are ionized by using multiphoton ionization and investigated with a reflectron time-of-flight mass spectrometry technique. The only observed cluster ions resulting from intracluster ion-molecule reactions following ionization are (CH3CHO)nH+, n=1-11. Among all observed protonated acetaldehyde clusters, (CH3CHO)2H+ and (CH3CHO)4H+ are found to be particularly stable. The experimental results give new insights into stable structures of hydrogen bonded acetaldehyde cluster ions. In a sampled time window of a few tens of microseconds, all protonated cluster ions with n=2-11, undergo metastable unimolecular decomposition, losing one acetaldehyde molecule. © 1990.

引用

页码：30 / 36

页数：7

共 32 条

[1]

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