Dissociation of methanol by ion-impact: Breakup dynamics, bond rearrangement and kinetic energy release

被引：14

作者：

De, Sankar ^{[1
]}

Roy, A. ^{[1
]}

Rajput, Jyoti ^{[1
]}

Ghosh, P. N. ^{[2
]}

Safvan, C. P. ^{[1
]}

机构：

[1] Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA

[2] Univ Calcutta, Dept Phys, Kolkata 700009, W Bengal, India

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2008年 / 276卷 / 01期

关键词：

molecular dissociation; time-of-flight mass spectrometry; coincidence technique; intramolecular bond rearrangement; kinetic energy release;

D O I：

10.1016/j.ijms.2008.06.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The dissociation dynamics of multiply charged methanol molecules formed in collision with 1.2 MeV Ar8+ projectiles is studied. Using coincidence mapping techniques, we can separate out the different dissociation pathways between carbon, oxygen and hydrogen ionic fragments as well as two- and three-body breakup events. Reactions involving intramolecular bond rearrangements within the CH3 group of the dissociative molecule are discussed in detail. A signature of hydrogen migration in doubly charged methanol is observed. Kinetic energy releases of different breakup channels are reported here and compared with values calculated from a Coulomb explosion model. The shape and orientation of the islands in the coincidence map give further information about the momentum balance in the fragmentation process of two-or many-body dissociation pathways. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：43 / 48

页数：6

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