title: A highly Selective Fluorescent Chemosensor for Zn2+Based on the Rhodamine Derivative Incorporating Coumarin Group.
abstract: A coumarin-appended rhodamine derivative was prepared by reacting rhodamine hydrazide and coumarin-3-carboxylic acid, which fluorescence sensing behavior toward Zn2+against other metal ions was investigated in CH3CN. Significantly, the rodamine-coumarin derivative exhibited highly selective and sensitive recognition toward Zn2+with a limit of detection (LOD) down to 10-9M. Upon addition of Zn2+, remarkable fluorescent intensities enhanced and also clear color changed from colorless to pink. The Job's plot indicated the formation of 1:1 complex between the rhodamine-coumarin derivative and Zn2+. The presence of common coexisting alkali, alkaline earth, and transition metal ions showed small or no interference with the detection of Zn2+. The conjugate dye could be used for "naked-eye" detection of Zn2+.
authors.affiliation: College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China. wangkunpeng@qust.edu.cn.
authors.forename: Kun-Peng
authors.initials: KP
authors.lastname: Wang
authors.affiliation: College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
authors.forename: Zhi-Hui
authors.initials: ZH
authors.lastname: Jin
authors.affiliation: College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
authors.forename: Hui-Shi
authors.initials: HS
authors.lastname: Shang
authors.affiliation: College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
authors.forename: Cheng-Dong
authors.initials: CD
authors.lastname: Lv
authors.affiliation: College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
authors.forename: Shaojin
authors.initials: S
authors.lastname: Chen
authors.affiliation: College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China. huzhiqiang@qust.edu.cn.
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Hu
keywords: Coumarin; Fluorescence; Rhodamine; Zinc ion