Alyousef Haifa, Alotaibi Badriah M, Ben Yahia Mohamed, Alanazi Meznah M, Alsaif Norah A
Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
Laboratory of Quantum and Statistical Physics LR18ES18, Faculty of Sciences of Monastir, 5000, Monastir, Tunisia.
Sci Rep. 2021 Apr 15;11(1):8316. doi: 10.1038/s41598-021-87773-z.
A quartz crystal adsorbent coated with 5,10,15,20-tetrakis(4-methylphenyl) porphyrin was used to examine the complexation phenomenon of three metallic ions [aluminum(III), iron(III) and indium(III)]. The aim is to select the appropriate adsorbate for metalloporphyrin fabrication. The equilibrium adsorption isotherms of tetrakis(4-methylphenyl) porphyrin were performed at four temperatures (from 300 to 330 K) through the quartz crystal microbalance (QCM) method. Subsequently, the experimental data were analyzed in order to develop a thorough explanation of the complexation mechanisms. The experimental results indicated that the aluminum(III) chloride is the adequate material for metalloporphyrin application. Theoretical investigation was established through physics adsorption models in order to analyze the experimental isotherms. The AlCl isotherms were modeled via a single-layer adsorption model which is developed using the ideal gas law. Whereas, the FeCl isotherms were interpreted via a single-layer adsorption which includes the lateral interactions parameters (real gas law), indicating the lowest stability of the formed iron-porphyrin complex. The participation of the chloride ions in the double-layers adsorption of InCl was interpreted via layer by layer formulation. Interestingly, the physicochemical investigation of the three adopted models indicated that the tetrakis(4-methylphenyl) porphyrin adsorption was an endothermic process and that the aluminum(III) chloride can be recommended for an industrial application because it presents the highest adsorption energy (chemical bonds with porphyrins).
一种涂有5,10,15,20-四（4-甲基苯基）卟啉的石英晶体吸附剂被用于研究三种金属离子（铝（III）、铁（III）和铟（III））的络合现象。目的是为金属卟啉制备选择合适的吸附质。通过石英晶体微天平（QCM）方法在四个温度（300至330K）下进行了四（4-甲基苯基）卟啉的平衡吸附等温线实验。随后，对实验数据进行分析，以便深入解释络合机制。实验结果表明，氯化铝是用于金属卟啉应用的合适材料。通过物理吸附模型进行理论研究，以分析实验等温线。AlCl等温线通过使用理想气体定律建立的单层吸附模型进行建模。而FeCl等温线通过包含横向相互作用参数（真实气体定律）的单层吸附来解释，这表明所形成的铁-卟啉络合物稳定性最低。InCl双层吸附中氯离子的参与通过逐层公式进行解释。有趣的是，对所采用的三种模型的物理化学研究表明，四（4-甲基苯基）卟啉吸附是一个吸热过程，并且氯化铝因其具有最高的吸附能（与卟啉形成化学键）而可推荐用于工业应用。
