title: Synthesis and unusual response to potassium of bipyridinium-benzocrown ether conjugate.
abstract: A bipyridinium derivative appending a benzocrown ether, in which the phenyl unit in the benzocrown ether was directly bounded to the N-position of the bipyridinium unit, has been synthesized. The compound showed a yellow color associated with an intramolecular charge transfer (CT), which was affected by the presence of alkali and alkaline earth metal ions. An unusual CT response to K+for 1 was observed and could be applicable for K+sensing.
authors.affiliation: Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4 Takeda, Kofu 400-8511, Japan. Electronic address: kuwabara@yamanashi.ac.jp.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Kuwabara
authors.affiliation: Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4 Takeda, Kofu 400-8511, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Abe
mesh_terms: D043844:Crown Ethers / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D011188:Potassium / Q000737:chemistry*; D011726:Pyridinium Compounds / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013053:Spectrophotometry
chemical_list: D043844:Crown Ethers; D007477:Ions; D011726:Pyridinium Compounds; D008094:Lithium; D011188:Potassium
keywords: Bipyridinium; Chemosensor; Intramolecular charge transfer; Potassium sensing