title: Bidirectional and colorimetric recognition of sodium and potassium ions.
abstract: Host 1 based on the phenolphthalein skeleton and two crown ether moieties demonstrated opposite behaviors toward sodium and potassium cations caused by bidirectional complexation. [reaction: see text]
authors.affiliation: Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan. tsubaki@fos.kuicr.kyoto-u.ac.jp
authors.forename: Kazunori
authors.initials: K
authors.lastname: Tsubaki
authors.forename: Daisuke
authors.initials: D
authors.lastname: Tanima
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Kuroda
authors.forename: Kaoru
authors.initials: K
authors.lastname: Fuji
authors.forename: Takeo
authors.initials: T
authors.lastname: Kawabata
mesh_terms: D003124:Colorimetry; D043844:Crown Ethers / Q000737:chemistry; D007202:Indicators and Reagents; D020113:Phenolphthalein; D011188:Potassium / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature
chemical_list: D043844:Crown Ethers; D007202:Indicators and Reagents; D020113:Phenolphthalein; D012964:Sodium; D011188:Potassium