Synthesis and unusual response to potassium of bipyridinium-benzocrown ether conjugate.
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.
['Kuwabara|Tetsuo|T|', 'Abe|Koji|K|']
D043844:Crown Ethers D007477:Ions D008094:Lithium D009682:Magnetic Resonance Spectroscopy D011188:Potassium D011726:Pyridinium Compounds D021241:Spectrometry, Mass, Electrospray Ionization D013053:Spectrophotometry
Bipyridinium Intramolecular charge transfer Chemosensor Potassium sensing