"Kien X. Vo,Keisuke Hirata,James M. Lisy,Shun-ichi Ishiuchi,Masaaki Fujii","Infrared Spectra of Beauvericin-Alkaline Earth Metal Ion Complexes„ŸIon Preference to Physiological Ions",,"The Journal of Physical Chemistry A",,"Volume 127","Issue 34","pp. 7115?7120",2023,Aug. "Keisuke Hirata,Eiko Sato,James M. Lisy,Shun-ichi Ishiuchi,Masaaki Fujii","Ion Recognition beyond Size Matching: Cooperative Hydration Effect on the K+ Selectivity of Valinomycin over Na+ Revealed by Cryogenic Double Ion Trap Infrared Spectroscopy",,"The Journal of Physical Chemistry Letters","American Chemical Society","Volume 14","Issue 24","pp. 5567?5572",2023,June "Satoru Tanabe,Keisuke Hirata,Koichi Tsukiyama,James M. Lisy*,Shun-ichi Ishiuchi*,Masaaki Fujii*","Can Ag+ Permeate through a Potassium Ion Channel? A Bottom-Up Approach by Infrared Spectroscopy of the Ag+ Complex with the Partial Peptide of a Selectivity Filter",,"The Journal of Physical Chemistry Letters","American Chemical Society","Vol. 14","No. 11","pp. 2886-2890",2023,Mar.