title: 3,6-Disubstituted carbazole-based bisboronic acids with unusual fluorescence transduction as enantioselective fluorescent chemosensors for tartaric acid.
abstract: Carbazole-based bisboronic acids were found to be enantioselective fluorescent sensors for tartaric acid. The fluorescence response toward the enantiomers of tartaric acid at neutral pH displayed enhancement/diminishment. The sensor displays an unusual fluorescence intensity-pH relationship with diminished emission at acidic pH but enhanced emission at basic pH. Photoinduced electron transfer (PET) from the fluorophore to the protonated amine/phenylboronic acid unit is proposed to be responsible for this effect, which is rationalized by density functional theory (DFT) calculations.
authors.affiliation: State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Han
authors.forename: Lina
authors.initials: L
authors.lastname: Chi
authors.forename: Xiaofen
authors.initials: X
authors.lastname: Liang
authors.forename: Shaomin
authors.initials: S
authors.lastname: Ji
authors.forename: Shasha
authors.initials: S
authors.lastname: Liu
authors.forename: Fuke
authors.initials: F
authors.lastname: Zhou
authors.forename: Yubo
authors.initials: Y
authors.lastname: Wu
authors.forename: Keli
authors.initials: K
authors.lastname: Han
authors.forename: Jianzhang
authors.initials: J
authors.lastname: Zhao
authors.forename: Tony D
authors.initials: TD
authors.lastname: James