| 基于5-羟甲基间苯二甲酸和咪唑衍生物的半导体型Ni-MOFs的合成、晶体结构和光催化性质 |
| Semiconductive Ni-MOFs Based on 5-(Hydroxymethyl) Isophthalic Acid and Imidazole Derivatives: Synthesis, Crystal Structures, and Photocatalytic Properties |
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| 摘要: 利用水热反应制备了2个配合物{[Ni （HIPA）（2，5-DPBI）1.5（H2O）]·2.25H2O}n （1）和[Ni （HIPA）（2，5-DPBMI）（H2O）]n （2）（H2HIPA=5-（羟甲基）间苯二甲酸，2，5-DPBI=1，1'-（2，5-二甲基-1，4-亚苯基）双（1H-咪唑），2，5-DPBMI=1，1'-（2，5-二甲基-1，4-亚苯基）双（4-甲基-1H-咪唑））。结构分析揭示在不同咪唑配体存在下，配合物的Ni（Ⅱ）中心具有不同的配位环境。配合物1具有拓扑符号为（42.66.82）的五连接三维框架，而配合物2则是dia型的四连接网络。粉末X射线衍射证实配合物1和2在有机溶剂和紫外可见光照射的水中均非常稳定。此外，紫外可见吸收谱、Mott-Schottky和电化学阻抗谱（EIS）测试显示配合物1和2都是典型的n型半导体材料，具有较低的电荷传输阻抗。在光催化实验中，配合物1和2对染料亚甲基蓝的降解有催化活性。 |
| 关键词: 三维镍基框架 n型半导体 光催化活性 5-羟基间苯二甲酸 咪唑配体 |
| 基金项目: 国家自然科学基金（No.21761036）和贵州省自然科学基金（No.20181182）资助。 |
| Abstract: Two complexes {[Ni(HIPA) (2, 5-DPBI)1.5(H2O)] ·2.25H2O}n (1) and [Ni(HIPA) (2, 5-DPBMI) (H2O)]n (2) (H2HIPA=5-(hydroxymethyl) isophthalic acid, 2,5-DPBI=1,1'-(2,5-dimethyl-1,4-phenylene)bis(1H-imidazole), 2,5-DPBMI=1,1'-(2,5-dimethyl-1,4-phenylene)bis(4-methyl-1H-imidazole)) were synthesized via hydrothermal method. Structural analysis reveals that Ni(Ⅱ) centers have different coordination environments in the existence of different imidazole ligands. As a result, complex 1 possesses a 5-connected framework with the topological symbol of (42.66.82), while complex 2 shows a 4-connected framework with dia net. The powder X-ray diffraction further firms that complexes 1 and 2 are very stable not only in a normal organic solvent but also in water under UV light. Moreover, the UV-Vis spectra, Mott-Schottky measurements, and electrochemical impedance spectroscopy (EIS) demonstrate that complex 1 and 2 are typical n-type semiconductors with low resistance in charge transportation. Finally, photocatalytic tests confirm that complexes 1 and 2 have catalytic activity for the degradation of methylene blue. |
| Keywords: three-dimensional Ni(Ⅱ)-framework n-type semiconductor photocatalytic activity 5-(hydroxymethyl) isophthalic acid imidazole ligand |
| 投稿时间：2021-10-08 修订日期：2022-05-20 |
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| 徐中轩,石明凤,白旭玲,袁婷婷.基于5-羟甲基间苯二甲酸和咪唑衍生物的半导体型Ni-MOFs的合成、晶体结构和光催化性质[J].无机化学学报,2022,38(9):1799-1807. |
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