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首页> 外文期刊>RSC Advances >Porphyrin-based electrostatically self-assembled multilayers as fluorescent probes for mercury(II) ions: a study of the adsorption kinetics of metal ions on ultrathin films for sensing applications
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Porphyrin-based electrostatically self-assembled multilayers as fluorescent probes for mercury(II) ions: a study of the adsorption kinetics of metal ions on ultrathin films for sensing applications

机译：基于卟啉的静电自组装多层作为汞（II）离子的荧光探针：对近超本薄膜的金属离子吸附动力学进行传感应用的研究

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摘要

The electrostatic multilayer self-assembly technique was employed to prepare fluorescent probes for mercury(II) ions. Films showing an appreciable fluorescence emission were obtained by alternate adsorption of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) with polyelectrolytes. Fluorescence intensity quenching, arising from the coordinative interaction between the porphyrin and mercury ions, was monitored as a function of time. The response mechanism was studied on the basis of kinetic and equilibrium models for adsorption. The adsorption process of mercury ions on porphyrin-based films was described by the pseudo-second-order equation and the kinetic parameters were correlated with the initial concentrations of the metal ions in aqueous solution. The kinetic approach was evaluated as an alternative to monitoring the sensing responses at equilibrium.
机译：采用静电多层自组装技术为汞（II）离子制备荧光探针。 通过用聚电解质交替吸附5,10,15,2-四磺酰基）卟啉（TPP），获得显示出明显的荧光发射的薄膜。 从卟啉和汞离子之间的协调相互作用产生的荧光强度猝灭被监测为时间的函数。 基于动力学和平衡模型进行了吸附的响应机制。 通过伪二阶方程描述了卟啉基薄膜上汞离子的吸附过程，并且动力学参数与水溶液中金属离子的初始浓度相关。 在均衡时评估动力学方法作为监测感测反应的替代方案。

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  • 来源
    《RSC Advances》 |2015年第2期|共9页
  • 作者

    Caselli Monica;

  • 作者单位

    Univ Modena &

    Reggio Emilia Dept Chem &

    Geol Sci Via Campi 183 I-41125 Modena Italy;

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