Ab initio evaluation of complexation energies for cyclodextrin drug inclusion complexes

Kenji Oqmhula; Kenta Hongo; Ryo Maezono; Tom Ichibha

doi:10.1021/acsomega.0c01059

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arXiv · 2001.01548

Ab initio evaluation of complexation energies for cyclodextrin drug inclusion complexes

Kenji Oqmhula·Kenta Hongo·Ryo Maezono·Tom Ichibha

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Abstract

We examined the reliability of exchange-correlation functionals for molecular encapsulations combined by van der Waals forces, comparing their predictions with those of diffusion Monte Carlo method. We established that functionals with D3 dispersion force correction and including sufficient proportion of exact-exchange in long-ranged interaction can comparatively reliably estimate the binding strength. Our finding agrees with a previous ab initio study on argon dimer. However we found that even such functionals may not be able to distinguish the energy differences among different conformations.

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Kenji Oqmhula, Kenta Hongo, Ryo Maezono, Tom Ichibha. 2020-01-06. Ab initio evaluation of complexation energies for cyclodextrin drug inclusion complexes. https://doi.org/10.1021/acsomega.0c01059

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