title: Performance of Several Density Functional Theory Methods on Describing Hydrogen-Bond Interactions.
abstract: We have investigated eleven density functionals, including LDA, PBE, mPWPW91, TPSS, B3LYP, X3LYP, PBE0, O3LYP, B97-1, MPW1K, and TPSSh, for their performances on describing hydrogen bond (HB) interactions. The emphasis has been laid not only on their abilities to calculate the intermolecular hydrogen bonding energies but also on their performances in predicting the relative energies of intermolecular H-bonded complexes and the conformer stabilities due to intramolecular hydrogen bondings. As compared to the best theoretical values, we found that although PBE and PBE0 gave the best estimation of HB strengths, they might fail to predict the correct order of relative HB energies, which might lead to a wrong prediction of the global minimum for different conformers. TPSS and TPSSh did not always improve over PBE and PBE0. B3LYP was found to underestimate the intermolecular HB strengths but was among the best performers in calculating the relative HB energies. We showed here that X3LYP and B97-1 were able to give good values for both absolute HB strengths and relative HB energies, making these functionals good candidates for HB description.
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Center for Theoretical Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China, and Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong.
authors.forename: Li
authors.initials: L
authors.lastname: Rao
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Center for Theoretical Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China, and Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Ke
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Center for Theoretical Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China, and Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong.
authors.forename: Gang
authors.initials: G
authors.lastname: Fu
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Center for Theoretical Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China, and Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong.
authors.forename: Xin
authors.initials: X
authors.lastname: Xu
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Center for Theoretical Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China, and Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong.
authors.forename: Yijing
authors.initials: Y
authors.lastname: Yan