Dynamics of ion assembly in solution: 2DIR spectroscopy study of LiNCS in benzonitrile

Minbiao Ji, Sungnam Park, Kelly J. Gaffney

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The solute-solvent interaction dictates the equilibrium structure of ionic assemblies in solution, ranging from free ions, ion pairs, ion-pair dimers, and ion-pair tetramers to nanoparticles and ionic crystals. We use two-dimensional infrared (2DIR) spectroscopic measurements of the antisymmetric CN stretch of thiocyanate (NCS-) to study the equilibrium chemical exchange between the spectrally distinct ion pair and the ion-pair dimer in benzonitrile. We observe this chemical exchange to occur with a 36 ± 4 ps time constant. Our measurement indicates that 2DIR will provide a useful tool for investigating the dynamics of ion assembly in solution.

Original languageEnglish
Pages (from-to)1771-1775
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume1
Issue number12
DOIs
Publication statusPublished - 2010 Jun 17

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ASJC Scopus subject areas

  • Materials Science(all)

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