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A Highly Sensitive and Selective fluorescence chemosensor for Cu^2＋ and Zn^2＋ Based on Solvent Effect

Chinese Journal of Chemistry 2013年第2期31卷 195-199页

作者： Xiaobo Huang Qian Miao Lu Wang Jieming Jiao Xianjing He Yixiang Cheng College of Chemistry and Materials Engineering Wenzhou University Wenzhou Zkejiang 325035 China Key Lab of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210093 China

A novel fluorescence chemosensor 1 based on （R）-binaphthyl-salen can exhibit highly sensitive and selective recognition responses toward Cu^2＋ by ＂turn-off＂ fluorescence quench type in THF/H20, and Zn^2＋ by ＂turn-on＂ fluorescence enhancement type in CHC13/CH3CN, respectively, suggesting that solvents can dramatically affect the responsive properties of salen-based chemosensor. In addition, Cu^2＋ can lead to the most pronounced changes of CD spectra without the influence of solvents, which indicates this kind chemosensor can also be used as a sole Cu^2＋ probe based on CD spectra.

关键词： binaphthyl-salen fluorescence chemosensor solvent effect circular dichroism transition metal ion sensing

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fluorescence chemosensors with pyrene and their interaction with nucleotide phosphate

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Science China Chemistry 1999年第3期42卷 236-244页

作者：李华平汪鹏飞吴世康 1. Institute of Photographic Chemistry Chinese Academy of Sciences 100101 Beijing China

A group of fluorescence chemosensor with pyrene, compounds (I), (II) and (III), were synthesized. The fluorescence spectra and the lifetime of these compounds were carefully measured. The fluorescence quenching spectra of pyrenyl butyric acid, compounds (I), (II) and (III) by different nucleotide phosphates, AMP ADP, ATP, dTTP, were also recorded and studied. The quenching and the stability constants were calculated by Stern-Volmer equation and eq. (2), respectively. The mechanism of interaction between fluorescence chemosensor and nucleotide phosphate was didscussed based on the comparison of the results obtained with the CPK model of free molecules of these com-pounds in the ground state.

关键词： fluorescence chemosensor nucleotide phosphate excimer molecular recognition

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Synthesis of Porphyrin-Appended Pyridine as a Fluorescent chemosensor for Cd（Ⅱ） and Hg（Ⅱ）

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Journal of Chemistry and Chemical Engineering 2010年第10期4卷 56-61页

作者： Nahom Piyasak Yoosrijaroen Warapan Panpae Komvalai Department of Chemistry Faculty of Science King Mongkut＇s University of Technology Thonburi Bangkok 10149 Thailand

In this research, specific molecular sensors are classified according to the type of receptor-cation interaction, that is ligand-metal interactions. Receptors are based on a multidentate protoporphyrin-appended pyridine platform, which leaves at least a vacant coordination site for the incoming metal ions. A protoporphyrin-appended pyridine, 2,5-pyridine dicarboxyamidyl-8,13-bis（vinyl）-3,7,18,17-tetramethyl-21 H, 23 H-porphyrin（P-PTP）, was designed and synthesized. Its application as potential fluoroionophore for recognition of cadmium and mercury ions is reported. P-PTP shows chelation-enhanced fluorescence effect with Cd（Ⅱ） and Hg（Ⅱ） via the interruption of photoinduced electron transfer （PET） process, which has been utilized as the basis of the fabrication of the metal ions-sensitive fluorescent chemosensor. The analytical performance characteristics of the proposed Cd（Ⅱ）- and Hg（Ⅱ）- sensitive chemosensors were investigated. It shows a linear response toward Cd（Ⅱ） and Hg（Ⅱ） in the concentration range of 1.0×10-3 to 1.0×10-7 M with a limit of detection of 1.0×10-7 M and 0.5×10-7M for Cd（Ⅱ） and Hg（Ⅱ）, respectively. The chemosensor shows good selectivity for Cd（Ⅱ） over a large number of other transition metal ions, i.e., Cu（Ⅱ）, Zn（Ⅱ） and mixed metal ions.

关键词： fluorescence chemosensor protoporphyrin pyridine derivatives cadmium ions mercury ions.

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A znic（Ⅱ） coordination polymer as fluorescence probe for sensing benzonitrile via in-situ synthesis approach

A znic（Ⅱ） coordination polymer as fluorescence probe for ...

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中国化学会第九届全国无机化学学术会议

作者： Ling Li Ji-Yong Zou Institute of applied chemistry Jiangxi academy of sciences

Recently,fluorescence chemosensors have attracted great interest in the field of coordination polymers because of their potential in the application of environment detection,such as pollutant,heavy metals and so on.[1,2]One of the most challenging but promising synthetic strategies to achieve such multifunctionalized materials is the simultaneous assembly of metal ions and small organic ligands under hydro（solvo）thermal condition,resulting in unpredictable final products,which could also be ascribed as an in-situ synthetic approach.[3]Through this synthetic strategy,new coordination polymers that are inaccessible or not easily formed under conventional conditions may be easily obtained in high ***,an in-situ reaction of coordination polymers is still difficult to achieve,partly because of the difficulties of the cleavage and/or formation of bonds during the crystallization *** this contribution,a 2D sql topological zinc（Ⅱ）homometallic coordination polymer{[Zn（TAA-OH）2]·1.5H2O}n（1）（TAA-OH=2-（5-hydroxy-1H-1,2,4-triazole-1-yl）acetic acid）via an in-situ synthetic approach was successfully synthesized and fully characterized,where TAA-OH is generated from 2-（1H-1,2,4-triazole-1-yl）acetic acid（HTAA）.Luminescence performance reveals this coordination polymer is a promising fluorescence chemosensor for benzonitrile.

关键词： in-situ synthesis zinc(Ⅱ) coordination polymer 2-(5-hydroxy-1H-1 2 4-triazole-1-yl) acetic acid fluorescence chemosensor benzonitrile

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