title: A selectively fluorescein-based colorimetric probe for detecting copper(II) ion.
abstract: A novel fluorescein derivative furfuraldehyde fluorescein hydrazone (FFH) has been synthesized by reacting fluorescein hydrazide with furfuraldehyde and characterized by (1)H NMR, (13)C NMR, MS and elemental analysis. Addition of Cu(2+) to the solution of FFH results in a rapid color change from colorless to yellow together with an obvious new band appeared at 502 nm in the UV-vis absorption spectra. This change is attributed to the spirocycle form of FFH opened via coordination with Cu(2+) in a 1:1 stoichiometry and their association constant is determined as 6.1×10(4) L mol(-1). Experimental results indicate that the FFH can provide a rapid, selective and sensitive response to Cu(2+) with a linear dynamic range 6.6-330 μmol/L. Common interferent ions do not show any interference on the Cu(2+) determination. It is anticipated that FFH can be a good candidate probe and has potential application for Cu(2+) determination in aqueous solution.
authors.affiliation: Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, PR China; School of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, PR China.
authors.forename: Jiangang
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, PR China; School of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Wei
authors.affiliation: Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Ma
authors.affiliation: Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Shaomin
authors.initials: S
authors.lastname: Shuang
authors.affiliation: Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Zongwei
authors.initials: Z
authors.lastname: Cai
authors.affiliation: Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, PR China. Electronic address: dc@sxu.edu.cn.
authors.forename: Chuan
authors.initials: C
authors.lastname: Dong
mesh_terms: D002413:Cations, Divalent / Q000032:analysis; D003124:Colorimetry / Q000379:methods; D003300:Copper / Q000032:analysis*; D019793:Fluorescein / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006835:Hydrazones / Q000737:chemistry*; D057230:Limit of Detection; D013050:Spectrometry, Fluorescence / Q000379:methods; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002413:Cations, Divalent; D005456:Fluorescent Dyes; D006835:Hydrazones; D003300:Copper; D019793:Fluorescein
keywords: Colorimetric; Copper; Fluorescein; Furfuraldehyde; Hydrazine; Probe