title: Highly selective fluorescence turn-on chemosensor based on naphthalimide derivatives for detection of copper(II) ions.
abstract: A new fluorescent probe, DN-SB, was synthesized. DN-SB was based on the naphthalimide derivatives and exhibited high selectivity and sensitivity for Cu(2+) ions. As a Cu(2+)-amplified fluorescent probe, its fluorescence spectrum showed 4.5-fold enhancement in the intensity of the signal at 519 nm on binding with the Cu(2+). Based on the fluorescence titration spectra and job's-plot, binding mode of DN-SB with Cu(2+) was proposed. Fluorescence intensity was linear with concentration of Cu(2+) cation in a range from 4 μM to 7 μM. DN-SB was also sensitive for copper ions. The detection limit was calculated to be 0.15 μM which indicated DN-SB was sensitive to Cu(2+).
authors.affiliation: Shanghai Key Laboratory of Functional Materials Chemistry and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Chen
authors.forename: Limin
authors.initials: L
authors.lastname: Wang
authors.forename: Gang
authors.initials: G
authors.lastname: Zou
authors.forename: Jun
authors.initials: J
authors.lastname: Tang
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Cai
authors.forename: Mingshuang
authors.initials: M
authors.lastname: Teng
authors.forename: Li
authors.initials: L
authors.lastname: Chen
mesh_terms: D002413:Cations, Divalent / Q000032:analysis; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D057230:Limit of Detection; D053644:Naphthalimides / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D002413:Cations, Divalent; D005456:Fluorescent Dyes; D053644:Naphthalimides; D003300:Copper