A strategy for obtaining a more accurate transition state estimate using the growing string method

被引:18
|
作者
Goodrow, Anthony [1 ]
Bell, Alexis T. [1 ]
Head-Gordon, Martin [2 ]
机构
[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
基金
美国国家科学基金会;
关键词
NUDGED ELASTIC BAND; SADDLE-POINTS; LOCATION;
D O I
10.1016/j.cplett.2009.11.050
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
The present study describes a new method for obtaining a more accurate transition state estimate through interpolation of the reaction pathway. The method can be implemented using the reaction pathway or during the reparameterization step of the modified-growing string method. The transition state estimate is obtained by mapping the location of the maximum in energy along the reaction pathway to a set of coordinates in phase space. This method has been tested on three reactions of increasing complexity, representing a 35.0-77.8% reduction in CPU time for the transition state optimization calculation compared to using the geometry highest in energy. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:392 / 398
页数:7
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