In this work, the effect of functional groups on I₂ sorption kinetics is investigated using two different types of isostructural metal‐organic frameworks, UiO‐66‐X series (X = H, Br, NO₂, NH₂, (OH)₂, and (COOH)₂) and M₂(m‐DOBDC) series, (M = Co2+, Mg2+, and Ni2+; m‐DOBDC⁴⁻ = 4,6‐dioxo‐1,3‐benzenedicarboxylate). Among the UiO‐66‐X series, UiO‐66‐(COOH)₂ exhibits the fastest sorption kinetics and the highest sorption capacity due to dipole‐induced dipole interactions between carboxylic acid groups and I₂ molecules. In addition, faster I₂ chemisorption is observed in M₂(m‐DOBDC) because of electrophilic aromatic substitution of m‐DOBDC⁴⁻ with I₂. The I₂ sorption mechanisms are further supported by fitting the I₂ adsorption kinetics data to pseudo‐first‐order and pseudo‐second‐order kinetic models.

中文翻译：

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官能团对同构金属-有机骨架的I 2吸附动力学的影响

在这项工作中，使用两种不同类型的同构金属-有机骨架UiO-66-X系列（X = H，Br，NO ₂，NH ₂，（OH）₂）研究了官能团对I ₂吸附动力学的影响，（（COOH）₂）和M ₂（m‐ DOBDC）系列（M = Co2 +，Mg2 +和Ni2 +; m ‐ DOBDC ^4- = 4,6-二氧代-1,3-苯二甲酸）。在UiO-66-X系列中，UiO-66-（COOH）₂表现出最快的吸附动力学和最高的吸附能力，这归因于羧酸基团与I ₂分子之间的偶极相互作用。另外，我更快₂在M ₂（m- DOBDC）中观察到化学吸附，因为m- DOBDC ^4-被I ₂亲电取代。所述I ₂吸附机构由拟合我进一步支持₂吸附动力学数据到伪一阶和伪二阶动力学模型。