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Highly Sensitive and Selective Chemosensor for Cu2＋ Based on a Schiff Base

Chemical Research in Chinese Universities 2013年第3期29卷 419-423页

作者： CAO Ben-nan HU Qin HUANG Yan JIA Chun-man ZHANG Qi Key Study Center of Ministry of Education for Tropical Resources Utilization Hainan Provincial Key Lab of Fine Chemicals Hainan University Haikou 570228 P. R. China Department of Chemistry and Chemical Engineering Jiangsu University Jiangsu 212013 P. R. China

A new chemosensor based on a Schiff base has been designed and synthesized. Its sensing behavior toward various metal ions was investigated by fluorescence and UV-Vis spectroscopic methods. The fluorescence of the sensor was quenched and the color rapidly changed from canary yellow to brown after the addition of Cu2＋, while no changes occurred after the addition of other metal ions, which contributes to the detection of Cu2＋ with naked eyes. The fluorescence quantum yield of the ligand was calculated to be 0.52. The corresponding detection limit of Cu2＋ was 5.721 × 10-7 mol/L, and the 1：1 binding mode of the sensor with Cu2＋ was revealed by Job＇s plot.

关键词： Chemosensor Schiffbase Copper ion naked-eye detection Quench

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New rhodamine derivative as OFF-ON fluorescent chemosensor for detection of Cu^(2+)

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Science China Chemistry 2011年第10期54卷 1635-1639页

作者： MA Xing LIU Jun DU YuGuo WEI GuoHua WEI DongBin State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China College of Chemistry and Chemical Engineering Graduate University of Chinese Academy of Sciences Beijing 100049 Ghina

A novel fluorescence probe for the detection of Cu2+ has been designed and synthesized, which is based on a ring-opening reaction of spirolactam triggered by Cu2+ . This probe exhibits excellent Cu2+ ion selectivity as well as significant color changes visible to the naked eye at the concentration of 0.03 mM (ca. 2.0 mg/L), the WHO (World Health Organization) recommended level (2.0 mg/L) of Cu2+ ions in drinking water. This novel rhodamine-based fluorescence probe can be directly used to detect Cu2+ with satisfactory sensitivity and selectivity in aqueous solution.

关键词： copper fluorescent chemosensor rhodamine naked-eye detection

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Highly selective and turn-on fluorescence probe with red shift emission for naked-eye detecting Al^(3+)and Ga^(3+)based on metal-organic framework

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Chinese Chemical Letters 2022年第1期33卷 541-546页

作者： Linhui Wu Shuli Yao Hui Xu Tengfei Zheng Suijun Liu Jinglin Chen Na Li Herui Wen School of Chemistry and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China School of Materials Science and Engineering Tianjin Key Laboratory of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin 300350China

A novel ZnII-based metal-organic framework with the formula of{[Zn_(2)(BBIP)_(2)(NDC)_(2)]·H_(2)O}n(JXUST-5)derived from 3,5-bis(benzimidazol-1-yl)pyridine(BBIP)and 1,4-naphthalenedicarboxylic acid(H_(2)NDC)has been *** adjacent Zn^(II)ions are linked through two BBIP ligands to form a[Zn_(2)(BBIP)_(2)]secondary building unit(SBU).The neighbouring SBUs are further connected by NDC^(2-)withμ2-η^(1):η^(1)andμ2-η^(1):η^(1):η^(1)bridging modes to form a two-dimensional(2D)*** analysis shows that JXUST-5 could be simplified as an uninodal fes topology with a point symbol of{4.8^(2)}.Furthermore,the 2D framework net could be extended through C-H···πinteraction to form the three-dimensional supramolecular *** experiments suggest that JXUST-5 could selectively and sensitively recognize Al^(3+)and Ga^(3+)through fluorescence enhancement effect along with a relatively large red *** detection limits for Al^(3+)and Ga^(3+)are 0.17 and 0.69 ppm,***,the sensing process for both Al^(3+)and Ga^(3+)could be directly observed with naked eyes under 365 nm UV ***,JXUST-5 could be recycled at least five times as a fluorescent sensor toward Al^(3+)and Ga^(3+),which is the second example of turn-on MOF based fluorescent sensor toward Ga^(3+).

关键词： Metal-organic frameworks Fluorescence probe naked-eye detection Turn-on effect Red shift emission Al^(3+)and Ga^(3+)

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