Ritsumeikan University,Faculty of Life Sciences,Applied Chemistry


1. Liquid structure of a pure solvent and mixed solvents

Molecular arrangement in liquid is closely related with liquid properties. However, studies of liquid properties in microscopic level, compared with those of macroscopic level, are very few. We determine microscopic structure in liquid by using X-ray diffraction method and solve macroscopic properties in molecular level.

2. Structure of preferential solvation of ion in mixed solvents

Solvation structure of ion in aqueous solution has already been studied, but studies about preferential solvation in mixed solution of water and non-water solvents are very few. We derive preferential solvation structures of various ions by using EXAFS, electronic and Raman spectrum. We are proud of being publishing the most studies in this field.

3. Analysis of X-ray structure about supercritical state water and electrolyte aqueous solution

We research hydration structure in supercritical solution by using X-ray diffraction method at high-temperature and high-pressure.

4. Analysis of ion solvation structure in solution

Compared with many study examples about the solvation structure of metal ion in aqueous solution, ones of metal ion and anion in non-aqueous solution are still few. We derive solvation structure by using X-ray diffraction and EXAFS method.

5. Structural analysis of complexes by using EXAFS and X-ray diffraction in solution

We research structure of complexes in aqueous and non-aqueous solution by using X-ray diffraction and EXAFS method, and the relationship between complex structure and thermodynamic data in solution reaction. We have performed structural analysis of many metal complexes. In current research, we focus on complicated complex structure and complex structure in non-aqueous solution.

6. Thermodynamic research of complexation reaction in solution

We research the equilibrium in solution by using pH and absorption spectrum measurements, and we determine thermodynamic parameters (free energy, enthalpy and entropy) of complexation reaction. Results in that are related with that complex structural studies and explained in molecular level.

7. Structural analysis of reactive intermediate by using stopped-flow EXAFS method

The stopped-flow EXAFS method is our developed technique. That is successful in structural analysis of short-lived reactive intermediate, applying to metal substitution reaction of porphyrin complex. We apply this method to other systems.