Statistical physics study of the interaction of the 5, 10, 15, 20-tetrakis (4-tolylphenyl) porphyrin (H2TTPP) with magnesium ion: New microscopic interpretations
Statistical physics study of the interaction of the 5, 10, 15, 20-tetrakis (4-tolylphenyl) porphyrin (H2TTPP) with magnesium ion: New microscopic interpretations
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DOI：
10.1016/j.arabjc.2019.08.010
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发表时间：
2020-02-01
影响因子：
6
通讯作者：
Tounsi, Moncef
中科院分区：
文献类型：
--
作者：
Knani, Salah;Khalifa, Najla;Tounsi, Moncef
本文合成了四苯基卟啉分子，并将其用作镁离子的生物传感器。卟啉的金属化是一个需要研究和教育的基础步骤。实际上，硝酸镁在石英晶体上的卟啉涂层上的吸附等温线在四个温度下获得。然后，统计物理处理已被应用到推导新的微观解释的实验数据。这种分析处理的主要贡献是推导出一些物理化学参数相关的吸附过程中，无法实现的经验模型。用双能量的逐层吸附模型拟合了镁离子在卟啉上的吸附等温线。在该模型中，对影响吸附过程的7个参数进行了调整，即每个位点的离子数、受体位点的密度、两个能量参数、内聚压力、共体积和层数。吸附机制的特点是由一个充满活力的调查表明，镁离子的物理吸附到卟啉。通过开发我们的先进模型，三个经典的热力学函数进行了研究和解释。(C)2019年由Elsevier B.V.代表沙特国王大学制作和主持。
In this article, Tetraphenylporphyrin molecules were synthesized and used as biosensor for Magnesium ion. The metallization of porphyrin is a fundamental step which needs to be studied and educated. In fact, adsorption isotherms of magnesium nitrate on porphyrin coated onto Quartz crystal are achieved at four temperatures. Then, statistical physics treatment has been applied to deduce new microscopic interpretations for the experimental data. The main contribution of this analytical treatment is to deduct some physicochemical parameters related to the adsorption process which could not be achieved by means of empirical models. A Layer by Layer adsorption model with two energies was found to be the best model to reproduce the experimental isotherms of magnesium ion on porphyrin. In this model, seven parameters affecting the adsorption process were adjusted, namely the number of ions per site, the density of receptor sites, the two energetic parameters, the cohesion pressure, the covolume and the number of layers. The adsorption mechanisms were characterized by an energetic investigation which demonstrated that the magnesium ion was physisorbed onto porphyrin. Via the exploitation of our advanced model, three classical thermodynamic functions have been investigated and interpreted. (C) 2019 Production and hosting by Elsevier B.V. on behalf of King Saud University.