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Journal of Molecular Modeling

, Volume 15, Issue 2, pp 105–111 | Cite as

DFT study of a series of crown-4 ethers and their selectivity trend for alkali metal cations: Li+ and Na+

  • Hui Hou
  • Xingye Zeng
  • Xiaoping LiuEmail author
Original Paper

Abstract

The molecular and electronic structures for 12- to 16-crown-4 (named 12C4, 13C4, 14C4, 15C4, 16C4, respectively) and 2,3,5,6,8,9-hexahydrobenzo[b][1,4,7,10]tetraoxacyclododecine (B12C4) 3,5,6,7,9,10-hexahydro -2H-benzo[e][1,4,7,10]tetraoxacyclotridecine (B13C4) and their complexes with alkali metal cations Li+ and Na+ have been explored using the density functional theory (DFT) with B3LYP/ 6–31G* method. The nucleophilicity of crown-4 ethers has been investigated by the Fukui function. Their selectivity trend shows that of all the crown-4 ethers, 14C4 shows the highest cation selectivity for Li+ over Na+, has been achieved on the basis of thermodynamic analysis. In addition, Li+/crown-4 series are more stable than Na+/crown-4 series in the gas phase. The calculated results are in good agreement with the experimental observation.

Keywords

Cation selectivity Crown-4 ethers complexes Density functional theory (DFT) Thermodynamic analysis 

Notes

Acknowledgements

The support of Project of Guangdong Province Science and Technology Plan (Grant No. 2007B011000008) is gratefully acknowledged.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.College of ChemistryBeijing Normal UniversityBeijingChina
  2. 2.College of Science South China Agricultural UniversityWushanChina

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