Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (12): 3664.doi: 10.7503/cjcu20210564

• Physical Chemistry • Previous Articles     Next Articles

Rapid and Accurate Calculation of the Three⁃body Interaction Strength in the Hydrogen⁃bonded Complexes of Alcohols or Deoxyribose with Water

LI Xiaolei, SUN Yunjiao, TANG Ying, WANG Changsheng()   

  1. School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116029,China
  • Received:2021-08-10 Online:2021-12-10 Published:2021-09-23
  • Contact: WANG Changsheng E-mail:chwangcs@lnnu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21773102)

Abstract:

It is important to accurately and rapidly calculate the three-body interaction energies in the hydrogen-bonded complexes of alcohols or deoxyribose with water, especially for simulating the structures and functions of proteins and DNA in aqueous environments. Based on the understanding of the essence of many-body polarization effects, we estimated the three-body interaction energies of the hydrogen-bonded complexes composed of alcohols or deoxyribose with water via the polarizable dipole-dipole interaction model through regarding the polar chemical bonds O—H and C—O as bond-dipoles. The corresponding parameters were obtained by fitting to the three-body interaction energy curves with respect to the intermolecular distance of a methanol-water complex. The accuracy of our model and the transferability of parameters were validated through calculating the three-body interaction energies of the complexes of methanol, ethanol or deoxyribose with water. The calculated results demonstrated that our polarizable dipole-dipole interaction model and the parameters determined in this work can accurately estimate the three-body interaction energies of different hydrogen-bonded complexes, and the accuracy of our model is comparable with that of MP2 method.

Key words: Hydrogen-bonded complex, Three-body interaction, Chemical bond-dipole, Polarization effect, Polarizable dipole-dipole interaction model

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