"Keisuke Hirata,Eiko Sato,James M. Lisy,Shun-ichi Ishiuchi,Masaaki Fujii","Cation-responsive cavity expansion of valinomycin revealed by cryogenic ion trap infrared spectroscopy",,"Physical Chemistry Chemical Physics","The Royal Society of Chemistry","Vol. 25","No. 2","pp. 1075-1080",2022,Dec.