title: Fluorescence sensors for Zn(2+) based on conjugated indole Schiff base.
abstract: Two novel fluorescence probes based on conjugated Schiff base for the detection of Zn(2+) were developed. Corresponding molecular geometries, orbital energies, electron contributions and absorption properties of the fluorescence probes were calculated at B3LYP/6-31G(∗) by density functional theory. The fluorescence properties of the probes were investigated by UV-vis and fluorescence spectrometer. Results indicate that the probes exhibit excellent sensitivity and selectivity for Zn(2+) compared with metal ions examined. For example, the enhancement efficiency of the compound 2 for Zn(2+) is up to 846%. The detection limit of the sensor toward Zn(2+) could low to 1.0×10(-7)M. Moreover, mechanisms for the high selectivity and sensitivity of the probes to Zn(2+) were studied.
authors.affiliation: School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, Shandong 250353, PR China.
authors.forename: Ting
authors.initials: T
authors.lastname: Xu
authors.affiliation: School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, Shandong 250353, PR China. Electronic address: hdduan67@gmail.com.
authors.forename: Hongdong
authors.initials: H
authors.lastname: Duan
authors.affiliation: School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, Shandong 250353, PR China.
authors.forename: Xingjian
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, Shandong 250353, PR China.
authors.forename: Xia
authors.initials: X
authors.lastname: Meng
authors.affiliation: School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, Shandong 250353, PR China.
authors.forename: Juan
authors.initials: J
authors.lastname: Bu
mesh_terms: D007211:Indoles / Q000737:chemistry*; D007477:Ions; D008670:Metals / Q000737:chemistry; D008958:Models, Molecular; D011789:Quantum Theory; D012545:Schiff Bases / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D015032:Zinc / Q000032:analysis*
chemical_list: D007211:Indoles; D007477:Ions; D008670:Metals; D012545:Schiff Bases; C030374:indole; D015032:Zinc
keywords: Fluorescence sensors; Indole; Schiff base; Zn(2+); p-Phenylenediamine