title: Selective and Sensitive Detection of Silver(I) Ion Based on Tetracationic Complex and TGA/GSH Co-capped Quantum Dots as an Effective Fluorescent Sensing Platform.
abstract: CdTe quantum dots capped with glutathione (GSH) and thioglycolic acid (TGA) were synthesized and the interaction between QDs and tetracationic Fe complex was investigated. Based on the specific interaction between Ag+and cytosine bases (C), we designed a label-free DNA sensor for the detection of Ag+in aqueous solution. Furthermore, tetracationic Fe complex with a higher positive charge is demonstrated to improve the sensitivity of the sensor. A detection limit of 3.3 nmol dm-3was obtained, which was lower than in previous reports. This sensor also exhibits promising potential for real sample analysis.
authors.affiliation: College of Chemistry and Chemical Engineering, Hunan University of Arts and Science.
authors.forename: Xue-Wen
authors.initials: XW
authors.lastname: Liu
authors.forename: Jun-Shi
authors.initials: JS
authors.lastname: Shu
authors.forename: Yang
authors.initials: Y
authors.lastname: Xiao
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Song-Bai
authors.initials: SB
authors.lastname: Zhang
mesh_terms: D002412:Cations / Q000737:chemistry; D015342:DNA Probes / Q000737:chemistry; D004277:DNA, Single-Stranded / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D005978:Glutathione / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D045663:Quantum Dots; D012834:Silver / Q000032:analysis*; D013864:Thioglycolates / Q000737:chemistry*
chemical_list: D002412:Cations; D015342:DNA Probes; D004277:DNA, Single-Stranded; D005456:Fluorescent Dyes; D009942:Organometallic Compounds; D013864:Thioglycolates; D012834:Silver; C017487:2-mercaptoacetate; D005978:Glutathione