title: New fluorescence-quenching process through resumption of PET process induced by complexation of alkali metal ion.
abstract: [reaction: see text] Under acidic conditions, a fluorescence-quenching process of 1 induced by selective binding of alkali metal ions was discovered. The mechanism of this new process involves alkali metal ion-induced deprotonation of the ammonium ion to trigger resumption of a fluorescence-quenching PET process.
authors.affiliation: Laboratory of Chemical Biology, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China.
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Bu
authors.forename: Qi-Yu
authors.initials: QY
authors.lastname: Zheng
authors.forename: Chuan-Feng
authors.initials: CF
authors.lastname: Chen
authors.forename: Zhi-Tang
authors.initials: ZT
authors.lastname: Huang