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Research topics

Solvation at Interfaces

Heterodyne-detected electronic sum frequency generation (HD-ESFG) is applied to the investigation of solvation at interfaces. It is found that each solvatochromic probe molecule feels a different effective polarity at the air/water interface, depending on its orientation at the interface. It is also found that the air/water interface provides a more inhomogeneous solvation environment than do bulk solvents.

 

• [1] "Molecules at the Air/Water Interface Experience More Inhomogeneous Solvation Environment than in Bulk Solvents: A Quantitative Bandshape Analysis of Interfacial Electronic Spectra Obtained by HD-ESFG", S. K. Mondal, S. Yamaguchi, and T. Tahara, J. Phys. Chem. C 115 (2011) 3083.
• [2] "'Half hydration' at the air/water interface revealed by heterodyne-detected electronic sum frequency generation spectroscopy, polarization second harmonic generation, and molecular dynamics simulation", H. Watanabe, S. Yamaguchi, S. Sen, A. Morita, and T. Tahara, J. Chem. Phys. 132 (2010) 144701.
• [3] "Different molecules experience different polarity at the air/water interface", S. Sen, S. Yamaguchi, and T. Tahara, Angew. Chem. Int. Ed. 48 (2009) 6439.