Related Experiment Video
Updated: Aug 16, 2026

Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
Published on: July 11, 2012
[Ion solvation and ion association in high-concentration of NaBF4/DMF solutions]
Xiao-peng Xuan1, Jun-ming Tang, Jian-ji Wang
1Department of Chemistry, Henan Normal University, Xinxiang, China.
Abstract:
Ion solvation and ion association in solutions of NaBF4/DMF were studied by infrared and Raman spectroscopy and ab initio quantum chemistry. It was found that the sodium cation interacts on oxygen atom of C=O group in DMF molecules. The solvation number of Na+, four, was obtained according to the change analysis of CH3 rocking band. The splitting of the nu1 mode of BF4(-) anion indicates the presence of contact ion pairs. Ionic association degree increases with increasing molality of the salt. The solvated structure of Na+ and the geometry of Li+ BF4(-) ion pair were also suggested based on the ab initio calculations.
More Related Videos
08:06Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
10:12Flash NanoPrecipitation for the Encapsulation of Hydrophobic and Hydrophilic Compounds in Polymeric Nanoparticles
Published on: January 7, 2019
Related Concept Videos
Intermolecular Forces
Solubility Equilibria: Overview
Solubility is important in biological and environmental processes. A notable...
Intermolecular Forces in Solutions
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
Precipitation Reactions
Solvating Effects
Formation of Complex Ions