The fluorescent characteristics of a fluorimetric chemosensor for mercuric ion, Hg2+, employing a synthesized Rhodamine 6G derivative, have been analyzed. For that, a portable spectrofluorimeter composed of a 515 nm L...The fluorescent characteristics of a fluorimetric chemosensor for mercuric ion, Hg2+, employing a synthesized Rhodamine 6G derivative, have been analyzed. For that, a portable spectrofluorimeter composed of a 515 nm LED as excitation source, two fiber-optics and a CCD camera as detector, has been used, intended for “in situ” analysis. A highly selective Rhodamine based probe for Hg2+, that is water soluble and gives a positive response upon analyte binding, is reported. The reagent is bearing a monothiospirolactone group in a Rhodamine 6G architecture and the thiol atom served for the direct attack of thiophilic Hg2+. The fluorescence enhancement is attributed to the spirolactone ring opening and the coordination of two sulphur atoms to Hg2+ giving a 2:1 reagent: Hg2+ stoichiometry complex.展开更多
In this paper, 2-carboxybenzaldehyde rhodamine B thiohydrazine （1） was synthesized and developed as a fluorescent probe to recognize Hg2＋ in DMF/H2O （1：9, v/v） solution with high selectivity. The probe can be ap...In this paper, 2-carboxybenzaldehyde rhodamine B thiohydrazine （1） was synthesized and developed as a fluorescent probe to recognize Hg2＋ in DMF/H2O （1：9, v/v） solution with high selectivity. The probe can be applied to the quantification of rig2＋ with a linear concentration range covering from 1.0 × 10^-7 mol/L to 1.0 × 10^-5 mol/L （R2 = 0.9985） and a detection limit of 4.2 × 10^-8 mol/L. The experiment results show that the response of probe 1 to Hg2＋ is pH-independent in a wide range from 4.0 to 9.0. Moreover, the probe 1 exhibits excellent selectivity toward Hg2＋ over other common metal cations. Most importantly, the probe can be employed to monitor Hg2＋ in living cells using fluorescent imaging technique with satisfied results.展开更多
A gold（I） complex that exhibited aggregation-induced emission in acetonitrile-water mixtures was designed. It showed high selectivity and sensitivity for Hg2＋ in acetonitrile-H20 （1 ：1, V ： V） solution. Dynamic...A gold（I） complex that exhibited aggregation-induced emission in acetonitrile-water mixtures was designed. It showed high selectivity and sensitivity for Hg2＋ in acetonitrile-H20 （1 ：1, V ： V） solution. Dynamic light scatter-ing measurements were conducted to verify that the addition of Hg2 changed the particle size and induced fluorescence quenching.展开更多
基金supported by the Ministerio de Ciencia e Innovacion of Spain(Project CTQ2011-25388)the Junta de Extremadura(Consolidation Project GR10033 of Research Group FQM003 co-financed by European FEDER Funds).
文摘The fluorescent characteristics of a fluorimetric chemosensor for mercuric ion, Hg2+, employing a synthesized Rhodamine 6G derivative, have been analyzed. For that, a portable spectrofluorimeter composed of a 515 nm LED as excitation source, two fiber-optics and a CCD camera as detector, has been used, intended for “in situ” analysis. A highly selective Rhodamine based probe for Hg2+, that is water soluble and gives a positive response upon analyte binding, is reported. The reagent is bearing a monothiospirolactone group in a Rhodamine 6G architecture and the thiol atom served for the direct attack of thiophilic Hg2+. The fluorescence enhancement is attributed to the spirolactone ring opening and the coordination of two sulphur atoms to Hg2+ giving a 2:1 reagent: Hg2+ stoichiometry complex.
基金supported by the National Natural Science Foundation of China(Nos.21105038,21005033,21107036)the Opening Project of State Key Laboratory of Chemo/Biosensing andChemometrics of Hunan University(No.201007)+2 种基金China Postdoc-toral Science Foundation(No.2013M541604)Postdoctoral Foundation of Jiangsu Province(No.1301047B)the Scientific Research Foundation for the Talents in Jiangsu University(Jiangsu,China,No.10JDG035)
文摘In this paper, 2-carboxybenzaldehyde rhodamine B thiohydrazine （1） was synthesized and developed as a fluorescent probe to recognize Hg2＋ in DMF/H2O （1：9, v/v） solution with high selectivity. The probe can be applied to the quantification of rig2＋ with a linear concentration range covering from 1.0 × 10^-7 mol/L to 1.0 × 10^-5 mol/L （R2 = 0.9985） and a detection limit of 4.2 × 10^-8 mol/L. The experiment results show that the response of probe 1 to Hg2＋ is pH-independent in a wide range from 4.0 to 9.0. Moreover, the probe 1 exhibits excellent selectivity toward Hg2＋ over other common metal cations. Most importantly, the probe can be employed to monitor Hg2＋ in living cells using fluorescent imaging technique with satisfied results.
基金This work was supported by the National Natural Science Foundation of China （Nos. 20931006, 21072070 and 21272088） and the Program for Academic Leader in Wuhan Municipality （No. 201271130441）.
文摘A gold（I） complex that exhibited aggregation-induced emission in acetonitrile-water mixtures was designed. It showed high selectivity and sensitivity for Hg2＋ in acetonitrile-H20 （1 ：1, V ： V） solution. Dynamic light scatter-ing measurements were conducted to verify that the addition of Hg2 changed the particle size and induced fluorescence quenching.
