| 一个Yb8簇合物的合成、结构及CO2催化转化性质 |
| Synthesis, crystal structure, and conversion of CO2 of a Yb8 cluster |
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| 摘要: 使用多齿席夫碱配体H2L与Yb(acac)3·2H2O反应，设计并通过溶剂热法合成了一例结构新颖的八核镱簇合物[Yb8(acac)4(HL)4(L)2(μ3-O)4(C2H5O)4]·2C2H5OH·2CH2Cl2 (1)。单晶 X 射线衍射分析表明，簇合物呈中心对称的八核结构，中心稀土离子Yb1(Ⅲ))为八配位的双帽三角棱柱几何构型，Yb2、Yb3和Yb4均为七配位，分别为单帽三角棱柱、五角双锥及单帽八面体几何构型。簇合物1具有良好的溶剂稳定性。近红外荧光测试表明：簇合物1在室温下表现出Yb(Ⅲ)特征发射峰。此外，催化性质研究表明：簇合物1可以有效地催化CO2与环氧化合物的环加成反应，且作为异相催化剂表现出良好的循环性能。 |
| 关键词: Yb8簇合物 结构 催化性质 二氧化碳转化 |
| 基金项目: 山西省高校科技创新项目(No.2021L404)资助。 |
| Abstract: A novel and interesting Yb8 cluster, namely [Yb8(acac)4(HL)4(L)2(μ3-O)4(C2H5O)4]·2C2H5OH·2CH2Cl2 (1) (H2L=2-hydroxy-benzoic acid (5-hydroxymethyl-furan-2-ylmethylene)-hydrazide, and Hacac=acetylacetone), has been constructed by using a polydentate Schiff base ligand (H2L). X-ray diffraction analysis indicates that cluster 1 shows a central symmetric octanuclear structure. The eight-coordinated Yb1(Ⅲ) ion possesses a distorted bi-augmented trigonal prism geometrical configuration; while the three seven-coordinated Yb(Ⅲ) ions (Yb2, Yb3, and Yb4) possess capped trigonal prism, pentagonal bipyramid, and capped octahedron geometrical configuration, respectively. Cluster 1 possesses excellent solvent stability. Moreover, the photoluminescence property study shows that 1 displayed typical near-infrared luminescence of Yb(Ⅲ) at room temperature. Interestingly, cluster 1 exhibited high catalytic activity and can effectively catalyze the cycloaddition reaction of CO2 with various epoxides. As a heterogeneous catalyst, cluster 1 showed good cycling performance. CCDC: 2098280. |
| Keywords: Yb8 cluster structure catalytic property conversion of CO2 |
| 投稿时间：2022-07-20 修订日期：2022-12-23 |
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