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Comparison of different computational methods for water structure optimisation Cover

Comparison of different computational methods for water structure optimisation

By: R. Staník,  P. Ballo and  I. Benkovský  
Open Access
|Aug 2012

Abstract

We have compared several computational techniques with the aim to compute the radial distribution function (RDF) as a good characterization of water structure. In particular, we have used molecular mechanic (AMBER99), semi-empirical (AM1, PM3, PM6) and ab initio (DFT) technique. It has been shown that molecular mechanic gives very poor results in the case of water RDF. Ab initio techniques which are in general accepted as very exact methods, in the case of water underestimate intermolecular interaction. Unexpectedly, the semi-empirical method with PM6 parameterisation gives the best results in comparison with RDF measured by X-ray scattering experiment.

Language: English
Page range: 55 - 66
Published on: Aug 13, 2012
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year
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© 2012 R. Staník, P. Ballo, I. Benkovský, published by Comenius University in Bratislava, Faculty of Pharmacy
This work is licensed under the Creative Commons License.

Volume 59 (2012): Issue 1 (June 2012)