| 含苯并咪唑三足配体的金属配位化合物的合成及对碘的吸附性能 |
| Synthesis of metal coordination compounds containing benzimidazole tripod ligand and their adsorption properties for iodine |
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| 摘要: 通过溶剂热法合成了2种新型金属配位化合物[Co3(L1)2Cl6]n(1)和{[Cu (L1)(SO4)]·2CH3OH}n(2)，其中L1=2，2′，2″-三(1-苯并咪唑基)乙基胺，是一种中性苯并咪唑三足有机配体。单晶X射线衍射分析表明化合物1是一维链状结构、化合物2是三维结构；红外光谱和粉末X射线衍射表征证实化合物1和2的纯度较高。热重分析表明化合物1和2是耐热性的材料。碘吸附实验表明，2个化合物对环己烷溶液中的碘和气态碘都有很高的捕获性能且具有良好的循环利用性。同时，它们的吸附动力学最符合准二级模型，吸附过程以化学吸附为主。吸附机理研究进一步表明化合物的结构中含有苯、氮杂环等活性基团，间接增加了与碘的吸附位点，提高了与碘的化学反应性和碘的去除率。 |
| 关键词: 配位化合物 碘 吸附 苯并咪唑 捕获剂 |
| 基金项目: |
| Abstract: Two novel metal coordination compounds [Co3(L1)2Cl6]n (1) and {[Cu(L1)(SO4)]·2CH3OH}n (2), where L1= 2,2′,2″-tri(1-benzimidazolyl) ethylamine, have been synthesized by solvothermal method. L1 is a neutral benzimidazole tripod ligand. Single crystal X-ray diffraction analysis shows that compound 1 is a 1D chain structure and compound 2 is a 3D structure. The purity of compounds 1 and 2 was characterized by infrared spectroscopy and powder X-ray diffraction. Thermogravimetric analysis shows that compounds 1 and 2 are heat-resistant materials. The iodine adsorption experiments show that they have high performance of capturing iodine in cyclohexane solution and gaseous iodine and have good recycling ability. At the same time, their adsorption kinetics are most suitable for the quasi-second-order model, and the adsorption process is mainly chemisorption. According to the adsorption mechanism, the structures of the compounds contain active groups such as benzene and N heterocyclic ring, which indirectly increases the adsorption site with iodine and the chemical reactivity with iodine, improving the removal rate of iodine. |
| Keywords: coordination compound iodine adsorption benzimidazole trapping agent |
| 投稿时间：2023-09-04 修订日期：2023-11-29 |
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| 张星星,牛云垠.含苯并咪唑三足配体的金属配位化合物的合成及对碘的吸附性能[J].无机化学学报,2024,40(1):111-123. |
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