title: A Novel Chromone Schiff-Base Fluorescent Chemosensor for Cd(II) Based on C=N Isomerization.
abstract: A new chromone Schiff-base fluorescent probe 7'-methoxychromone-3'-methylidene-1,2,4-triazole-3-imine (L) was designed and synthesized for selective recognition Cd(2+). With the fluorescence titration and the ESI-MS data, we reach the conclusion that the binding mode of the ligand-metal (L-Cd (2+) ) complex is 1:1. The sensor showed a strong fluorescence enhancement in ethanol system of Cd(2+) (excitation 409 nm and emission 462 nm) and the sensing mechanism based on the fact that C=N isomerization can be used to explain this phenomenon.
authors.affiliation: College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Yan
authors.affiliation: College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, People's Republic of China.
authors.forename: Long
authors.initials: L
authors.lastname: Fan
authors.affiliation: College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, People's Republic of China.
authors.forename: Jing-Can
authors.initials: JC
authors.lastname: Qin
authors.affiliation: College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, People's Republic of China.
authors.forename: Chao-Rui
authors.initials: CR
authors.lastname: Li
authors.affiliation: College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, People's Republic of China. yangzy@lzu.edu.cn.
authors.forename: Zheng-Yin
authors.initials: ZY
authors.lastname: Yang
keywords: C=N isomerization; Cd2+; Chromone; Fluorescent sensor