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Dynamics of Ion Assembly in Solution: 2DIR Spectroscopy Study of LiNCS in Benzonitrile
- Authors
- Ji, Minbiao; Park, Sungnam; Gaffney, Kelly J.
- Issue Date
- 17-6월-2010
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.1, no.12, pp.1771 - 1775
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS
- Volume
- 1
- Number
- 12
- Start Page
- 1771
- End Page
- 1775
- ISSN
- 1948-7185
- 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.
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