title: A Highly Selective and Sensitive Fluorescent Chemosensor for Aluminum Ions Based on Schiff Base.
abstract: An efficient "off-on" type fluorescent chemosensor, (E)-N'-(4-(diethylamino)-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H2L), based on Schiff base for the determination of Al3+has been designed, synthesized, and evaluated. Upon treated with Al3+, the fluorescence of H2L was enhanced 45-fold due to the chelation-enhanced fluorescence (CHEF) effect based on the formation of a 1:1 complex between the chemosensor and Al3+. Other metal ions, such as Na+, K+, Mg2+, Ca2+, Cu2+, Ga3+, Zn2+, Cr3+, Cd2+, Ag+, Fe3+, In3+, Mn2+, Pb2+, Co2+, and Ni2+had little effect on the fluorescence. The results demonstrate that the chemosensor H2L has stronger affinity with Al3+than other metal ions. The detection limit of H2L for sensing Al3+is 3.60 × 10-6M in EtOH-H2O (3:7, v/v) solution. And the recognizing behavior has been investigated both experimentally and computationally.
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Cunji
authors.initials: C
authors.lastname: Gao
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Peixian
authors.initials: P
authors.lastname: Zang
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Weisheng
authors.initials: W
authors.lastname: Liu
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangyu@lzu.edu.cn.
authors.forename: Yu
authors.initials: Y
authors.lastname: Tang
keywords: Aluminum ion; Fluorescent chemosensor; Selectivity