Probing ion/molecule interactions in aqueous solutions with vibrational energy transfer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Jiebo Li
  • Hongtao Bian
  • Hailong Chen
  • Kaijun Yuan
  • Junrong Zheng

Detail(s)

Original languageEnglish
Pages (from-to)12284-12294
Journal / PublicationJournal of Physical Chemistry B
Volume116
Issue number40
Publication statusPublished - 11 Oct 2012
Externally publishedYes

Abstract

Interactions between model molecules representing building blocks of proteins and the thiocyanate anion, a strong protein denaturant agent, were investigated in aqueous solutions with intermolecular vibrational energy exchange methods. It was found that thiocyanate anions are able to bind to the charged ammonium groups of amino acids in aqueous solutions. The interactions between thiocyanate anions and the amide groups were also observed. The binding affinity between the thiocyanate anion and the charged amino acid residues is about 20 times larger than that between water molecules and the amino acids and about 5-10 times larger than that between the thiocyanate anion and the neutral backbone amide groups. The series of experiments also demonstrates that the chemical nature, rather than the macroscopic dielectric constant, of the ions and molecules plays a critical role in ion/ molecule interactions in aqueous solutions. © 2012 American Chemical Society.

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Citation Format(s)

Probing ion/molecule interactions in aqueous solutions with vibrational energy transfer. / Li, Jiebo; Bian, Hongtao; Wen, Xiewen; Chen, Hailong; Yuan, Kaijun; Zheng, Junrong.

In: Journal of Physical Chemistry B, Vol. 116, No. 40, 11.10.2012, p. 12284-12294.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review