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首页> 外文期刊>ChemPlusChem >Functionalized porphyrins as red fluorescent probes for metal cations: Spectroscopic, MALDI-TOF spectrometry, and doped-polymer studies
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Functionalized porphyrins as red fluorescent probes for metal cations: Spectroscopic, MALDI-TOF spectrometry, and doped-polymer studies

机译：官能化卟啉作为金属阳离子的红色荧光探针：光谱，MALDI-TOF光谱和掺杂聚合物研究

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摘要

The sensing ability of benzoporphyrins 1-5 and porphyrin-2-ylpyridines 6-10 towards different metal ions Na+, K+, Ca2+, Mg2+, Pb2+, Cu2+, Ni2+, Zn 2+, Cd2+, Hg2+, and Cr3+ was explored in solution by absorption and fluorescence spectroscopy. Strong changes in the ground and excited state were detected only in the case of the soft metal ions Zn2+, Cd2+, Hg2+, and Cu 2+. A one metal per ligand molar ratio was obtained in all cases for compoundsa 1-5. In addition, a remarkable increase of the emission intensity for 1-5 was observed in the presence of Hg2+. In this series the highest association constant was obtained for compounda 1 (log Kass=(8. 71±4.81)×10-3), which was able to quantify 32a ppb of Hg2+. For compoundsa 6-10 containing an additional pyridine unit, a metal-to-ligand stoichiometry of 1:2 was determined. The gas-phase detection abilities of compoundsa 1-10 using MALDI-TOF-MS spectrometry confirmed that their sensorial ability and theoretical calculations are in accordance with the stoichiometry observed. Our preliminary studies show that some of the compounds supported in polymethylmethacrylate (PMMA) films can be used as promising metal-ion solid chemosensors; it was found that compound 1 in PMMA is able to distinguish between Zn2+ and Hg2+ in the solid phase. Glowing report: Benzoporphyrins and porphyrins have been explored as fluorescent probes towards different metal ions. Probea 1 displays a high sensitivity for and selectivity response to Hg2+ with a remarkable fluorescence intensity enhancement. These compounds show sensorial ability in the gas phase and solid state, and when 1 is immobilized in polymethylmethacrylate it is able to discriminate between Zn2+ and Hg2+.
机译：求助于苯并卟啉-2-烯吡啶6-10朝不同金属离子Na +，K +，Ca2 +，Mg2 +，Pb2 +，Cd 2 +，Hg2 +和Cr3 +的感测能力吸收和荧光光谱。仅在软金属离子Zn2 +，CD2 +，HG2 +和Cu 2+的情况下仅检测地面和激发状态的强烈变化。在化合物1-5的所有情况下，获得每配体摩尔比的一种金属。此外，在HG2 +存在下观察到1-5的发射强度的显着增加。在该系列中，对于化合物1获得最高的关联常数（Log Kass =（8.71±4.81）×10-3），其能够量化32a ppb的Hg2 +。对于含有另外的吡啶单元的化合物6-10，测定1：2的金属 - 配体化学计量。使用MALDI-TOF-MS光谱法的化合物1-10的气相检测能力证实了它们的感觉能力和理论计算符合所观察到的化学计量。我们的初步研究表明，聚甲基甲基丙烯酸甲酯（PMMA）膜中负载的一些化合物可用作承诺的金属离子固体化学传感器;发现PMMA中的化合物1能够区分固相中的Zn2 +和Hg2 +。发光报告：苯唑啉和卟啉已被探索为朝向不同金属离子的荧光探针。 ProBeA 1显示对HG2 +的高灵敏度和选择性响应，具有显着的荧光强度增强。这些化合物在气相和固态中显示出感觉能力，当1当在聚甲基丙烯酸甲基丙烯酸甲酯中固定时，它能够区分Zn2 +和Hg2 +。

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  • 来源
    《ChemPlusChem》 |2013年第10期|共14页
  • 作者

    MouraN.M.M.; Nu?ezC.; SantosS.M.; FaustinoM.A.F.; CavaleiroJ.A.S.; NevesM.G.P.M.S.; CapeloJ.L.; LodeiroC.;

  • 作者单位

    Department of Chemistry and QOPNA University of Aveiro Campus de Santiago 3810-193 Aveiro;

    Chemistry Department Faculty of Science and Technology University NOVA of Lisbon 2829-516 Monte;

    Department of Chemistry and CICECO University of Aveiro A Campus de Santiago 3810-193 Aveiro;

    Department of Chemistry and QOPNA University of Aveiro Campus de Santiago 3810-193 Aveiro;

    Department of Chemistry and QOPNA University of Aveiro Campus de Santiago 3810-193 Aveiro;

    Department of Chemistry and QOPNA University of Aveiro Campus de Santiago 3810-193 Aveiro;

    Chemistry Department Faculty of Science and Technology University NOVA of Lisbon 2829-516 Monte;

    Chemistry Department Faculty of Science and Technology University NOVA of Lisbon 2829-516 Monte;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

    fluorescent probes; mercury; porphyrinoids; sensors; zinc;

    机译：荧光探针;汞;卟啉;传感器;锌;

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