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Issue 4, 2016
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Global optimization of clusters of rigid molecules using the artificial bee colony algorithm

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Abstract

The global optimization of molecular clusters is an important topic encountered in many fields of chemistry. In our previous work (Phys. Chem. Chem. Phys., 2015, 17, 24173), we successfully applied the recently introduced artificial bee colony (ABC) algorithm to the global optimization of atomic clusters and introduced the corresponding software “ABCluster”. In the present work, ABCluster was extended to the optimization of clusters of rigid molecules. Here “rigid” means that all internal degrees of freedom of the constituent molecules are frozen. The algorithm was benchmarked by TIP4P water clusters (H2O)N (N ≤ 20), for which all global minima were successfully located. It was further applied to various clusters of different chemical nature: 10 microhydration clusters, 4 methanol microsolvation clusters, 4 nonpolar clusters and 2 ion–aromatic clusters. In all the cases we obtained results consistent with previous experimental or theoretical studies.

Graphical abstract: Global optimization of clusters of rigid molecules using the artificial bee colony algorithm

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Supplementary files

Article information


Submitted
17 Oct 2015
Accepted
09 Dec 2015
First published
16 Dec 2015

Phys. Chem. Chem. Phys., 2016,18, 3003-3010
Article type
Paper
Author version available

Global optimization of clusters of rigid molecules using the artificial bee colony algorithm

J. Zhang and M. Dolg, Phys. Chem. Chem. Phys., 2016, 18, 3003
DOI: 10.1039/C5CP06313B

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