Intra ion-ion interactions in aqueous solution: Β-alanine zwitterion and 1,2-ethenediammonium

Ky Youb Nam, Jeong Hyeok Yoon, Kyoung Tai No

Research output: Contribution to journalArticlepeer-review


To illuminate the behavior of ion pairs in aqueous solution, both ab initio SCRF MO calculation and MD simulation were performed. The free energy difference of each system was decomposed into contributing components in order to investigate the role of the water in aqueous solution. In aqueous solution, the dominant component contributing to the ion pair stability, is not a solute-solute interaction, but an ion pair-water interaction and the energy change that originated from the rearrangement of the water molecules around the ion pair.

Original languageEnglish
Pages (from-to)391-395
Number of pages5
JournalChemical Physics Letters
Issue number3-4
Publication statusPublished - 2000 Mar 17

Bibliographical note

Funding Information:
This work was supported by The Korean Research Center for Theoretical Physics and Chemistry, The Korea Science and Engineering Foundation (1999-2-123-001-3) and STEPI/FOTD.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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