title: A sensitive fluorescent sensor for selective determination of dichlorvos based on the recovered fluorescence of carbon dots-Cu(II) system.
abstract: In this paper, a simple and sensitive fluorescent sensor for dichlorvos was first constructed based on carbon dots-Cu(II) system. These carbon dots were obtained by simple hydrothermal reaction of feather. The fluorescence of these carbon dots can be selectively quenched by Cu(2+) ion. When acetylcholinesterase and acetylthiocholine were introduced into the system, thiocholine came into being, which can react with Cu(2+) ion and restore the fluorescence of the system. The reaction mechanism between Cu(2+) ion and thiocholine was confirmed by X-ray photoelectron spectroscopy. As one kind of acetylcholinesterase inhibitor, organophosphorus pesticides can be detected based on this sensing system. As an example of organophosphorus pesticides, dichlorvos was detected with a linear range of 6.0×10(-9)-6.0×10(-8)M. This sensing system has been successfully used for the analysis of cabbage and fruit juice samples.
authors.affiliation: College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, PR China; College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong 271018, PR China.
authors.forename: Juying
authors.initials: J
authors.lastname: Hou
authors.affiliation: College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, PR China.
authors.forename: Guangjuan
authors.initials: G
authors.lastname: Dong
authors.affiliation: College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, PR China.
authors.forename: Zhengbin
authors.initials: Z
authors.lastname: Tian
authors.affiliation: College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, PR China.
authors.forename: Jiutian
authors.initials: J
authors.lastname: Lu
authors.affiliation: College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, PR China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Wang
authors.affiliation: College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, PR China. Electronic address: ashy@sdau.edu.cn.
authors.forename: Shiyun
authors.initials: S
authors.lastname: Ai
authors.affiliation: College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong 271018, PR China. Electronic address: mlwang@sdau.edu.cn.
authors.forename: Minglin
authors.initials: M
authors.lastname: Wang
mesh_terms: D000110:Acetylcholinesterase / Q000737:chemistry; D000122:Acetylthiocholine / Q000737:chemistry; D001937:Brassica / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D002800:Cholinesterase Inhibitors / Q000032:analysis; D003300:Copper / Q000737:chemistry; D004006:Dichlorvos / Q000032:analysis*; D005453:Fluorescence; D005504:Food Analysis; D005506:Food Contamination / Q000032:analysis; D000067030:Fruit and Vegetable Juices / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D056951:Photoelectron Spectroscopy / Q000379:methods*; D012680:Sensitivity and Specificity; D013860:Thiocholine / Q000737:chemistry
chemical_list: D002800:Cholinesterase Inhibitors; D010575:Pesticides; D000122:Acetylthiocholine; D013860:Thiocholine; D002244:Carbon; D003300:Copper; D004006:Dichlorvos; D000110:Acetylcholinesterase
keywords: Acetylcholinesterase; Carbon dots; Enzyme inhibition; Fluorescent; Organophosphorus compounds; Sensor