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• W4386021936 startingPage "7590" @default.
• W4386021936 abstract "This work presents improvements of the description of liquid water within the self-consistent-charge density-functional based tight-binding scheme combining the use of Weighted Mulliken (WMull) charges and optimized O–H repulsive potential through the iterative Boltzmann inversion (IBI) process. The quality of the newly developed models is validated considering pair radial distribution functions (RDFs), as well as other structural, energetic, thermodynamic, and dynamic properties. The use of WMull charges certainly improves the agreement with experimental data, however leading to over-structured RDFs at short distance, that can be further improved by considering an optimized O–H repulsive potential obtained by the IBI process. Three different schemes were used to optimize this potential: (i) optimization including short O–H distances. This led to accurate RDFs as well as improved self-diffusion coefficient and heat of vaporization, while the proton transfer energy barrier is severely deteriorated; (ii) optimization starting at long distance. The proton transfer energy barrier is recovered while the heat of vaporization is deteriorated and the O–H RDF is less accurate at short distance; (iii) optimization within the path-integral molecular dynamics scheme which allows us to exclude nuclear quantum effects from the repulsive potential. The latter potential, in conjunction with the WMull improved atomic charges, provides similar results as (i) for structural, dynamic, and thermodynamic properties while recovering a large part of the proton transfer energy barrier. It therefore offers a good compromise to study both dynamic properties and chemistry within liquid water at a quantum chemical level." @default.
• W4386021936 created "2023-08-22" @default.
• W4386021936 creator A5010738496 @default.
• W4386021936 creator A5054863185 @default.
• W4386021936 creator A5065726373 @default.
• W4386021936 creator A5092806800 @default.
• W4386021936 date "2023-08-21" @default.
• W4386021936 modified "2023-10-01" @default.
• W4386021936 title "Accurate SCC-DFTB Parametrization of Liquid Water with Improved Atomic Charges and Iterative Boltzmann Inversion" @default.
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• W4386021936 doi "https://doi.org/10.1021/acs.jpcb.3c03479" @default.
• W4386021936 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37603798" @default.
• W4386021936 hasPublicationYear "2023" @default.
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