Midbond basis functions for weakly bound complexes
Midbond basis functions for weakly bound complexes
复制标题
弱结合配合物的中键基函数
DOI:
10.1080/00268976.2018.1440018
复制
发表时间:
2018
影响因子:
1.7
通讯作者:
Shaw R
中科院分区:
文献类型:
--
作者:
Shaw R
Weakly bound systems present a difficult problem for conventional atom-centred basis sets due to large separations, necessitating the use of large, computationally expensive bases. This can be remedied by placing a small number of functions in the region between molecules in the complex. We present compact sets of optimised midbond functions for a range of complexes involving noble gases, alkali metals and small molecules for use in high accuracy coupled -cluster calculations, along with a more robust procedure for their optimisation. It is shown that excellent results are possible with double-zeta quality orbital basis sets when a few midbond functions are added, improving both the interaction energy and the equilibrium bond lengths of a series of noble gas dimers by 47% and 8%, respectively. When used in conjunction with explicitly correlated methods, near complete basis set limit accuracy is readily achievable at a fraction of the cost that using a large basis would entail. General purpose auxiliary sets are developed to allow explicitly correlated midbond function studies to be carried out, making it feasible to perform very high accuracy calculations on weakly bound complexes.
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DOI:
10.1063/1.3693411
发表时间:
2012-03
期刊:
The Journal of chemical physics
影响因子:
--
作者:
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通讯作者:
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影响因子:
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通讯作者:
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影响因子:
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通讯作者:
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DOI:
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发表时间:
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期刊:
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影响因子:
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作者:
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通讯作者:
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