title: A rhodamine derivative as selective fluorescent and colorimetric chemosensor for mercury (II) in buffer solution, test strips and living cells.
abstract: In this paper, we reported a new rhodamine derivative bearing 2,4-dichloroquinazoline as a selective fluorescent chemosensor for Hg(2+). The ring-opening process of spirolactam enabled the large fluorescent enhancement and colorimetric change by Hg(2+) induced configuration transformation of the rhodamine. Moreover, the fluorescence changes of the chemosensor were dramatically specific for Hg(2+) in the presence of other metal ions, which could meet the selective requirements for practical application. Under optimized experimental conditions, the linear response range covered the concentration range of Hg(2+) from 0 to 1.0×10(-6)M, and the limit of detection was calculated to be 2.7×10(-8)M. In addition, the probe was also successfully applied to the determination of Hg(2+) in water samples, test strips and living cells.
authors.affiliation: State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China.
authors.forename: Meng
authors.initials: M
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China. Electronic address: yfytju@yahoo.com.
authors.forename: Fan-Yong
authors.initials: FY
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zou
authors.affiliation: State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China.
authors.forename: Ning
authors.initials: N
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China. Electronic address: chenlis11@aliyun.com.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.affiliation: School of Chemical Engineering, Tianjin University, Tianjin 300072, PR China.
authors.forename: Li-Gong
authors.initials: LG
authors.lastname: Chen
mesh_terms: D002021:Buffers; D002413:Cations, Divalent / Q000032:analysis; D002460:Cell Line; D003124:Colorimetry / Q000379:methods; D060766:Drinking Water / Q000032:analysis; D005456:Fluorescent Dyes / Q000737:chemistry*; D006801:Humans; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D008958:Models, Molecular; D061848:Optical Imaging / Q000379:methods; D012235:Rhodamines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D002021:Buffers; D002413:Cations, Divalent; D060766:Drinking Water; D005456:Fluorescent Dyes; D012235:Rhodamines; D008628:Mercury
keywords: Cellular imaging; Crystal structure; Fluorescent probe; Mercury; Rhodamine; Turn-on