Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (11): 2403.doi: 10.7503/cjcu20140477

• Physical Chemistry • Previous Articles     Next Articles

Three-body Effect in Hydrogen-bonded Complexes Containing Amides and Uracil

LI Shushi, JIANG Xiaonan, WANG Changsheng*()   

  1. School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
  • Received:2014-05-21 Online:2014-11-10 Published:2014-10-21
  • Contact: WANG Changsheng E-mail:chwangcs@lnnu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21173109, 21133005), the Program of Liaoning Provincial Excellent Talents of University, China(No.LR2012037) and the Program of Leading Figures of Dalian City, China

Abstract:

Many-body effect plays a critical role on the structures and properties of clusters and condensed phases. Therefore the quantitative evaluation of the strength of many-body effects is important. In this paper, the three-body interactions and their contributions to the total interaction energy for hydrogen-bonded complexes composed of amide, dipeptide, uracil and water were evaluated at the second-order perturbation MP2 level of theory. It is found that the three-body interactions contribute as high as 10%—20% to the total interaction energy of the hydrogen-bonded complexes. It is also found that the three-body interaction is a short-range interaction, suggesting that the neighboring three-body effect should be taken into account in molecular simulation at least.

Key words: Three-body effect, Hydrogen-bonded complex, Interaction energy, Amide, Uracil, Clusters system, Condensed phases system

CLC Number: 

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