title: Synthesis of pyridine-based 1,3,4-oxadiazole derivative as fluorescence turn-on sensor for high selectivity of Ag+.
abstract: An oxadiazole derivative(OXD) containing symmetrical pyridine-2-formamidophenyl-binded moiety was synthesised as fluorescence turn-on sensor OA1. Its ultraviolet-visible(UV-vis) and fluorescent spectra(FS) gave prominent fluorescence enhancement only for monovalent silver ion(Ag(+)) in HEPES buffer solution (10 mM, pH = 7.0, DMF-H2O, 9:1, v/v), which indicated the photo-induced electron transfer(PET) occurred from the donor of pyridine-2-formamidophenyl group to oxadiazole fluorophore. The present study demonstrated that OA1 was a viable candidate as fluorescent receptor for a new Ag(+) sensor. And the results of fluorescent spectral titration showed this sensor formed 1:1 complex with Ag(+).
authors.affiliation: Department of Light-Chemical Engineering, Institute of Food and Light-Chemical Engineering, Nanjing University of Technology, Nanjing, 211816, People's Republic of China. zcl323@139.com
authors.forename: Chunling
authors.initials: C
authors.lastname: Zheng
authors.forename: Ailin
authors.initials: A
authors.lastname: Yuan
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Zhang
authors.forename: Hong
authors.initials: H
authors.lastname: Shen
authors.forename: Shuyuan
authors.initials: S
authors.lastname: Bai
authors.forename: Haibo
authors.initials: H
authors.lastname: Wang
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D060326:Chemistry Techniques, Synthetic; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry*; D055620:Optical Phenomena; D010069:Oxadiazoles / Q000138:chemical synthesis* / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012834:Silver / Q000032:analysis* / Q000737:chemistry; D013050:Spectrometry, Fluorescence
chemical_list: D005456:Fluorescent Dyes; D010069:Oxadiazoles; D011725:Pyridines; C583463:1,3,4-oxadiazole; D012834:Silver; C023666:pyridine