| 基于(1-甲基-1H-苯并咪唑-2-基)甲醇构筑的三个Zn(Ⅱ)配合物的合成、 晶体结构和荧光分 |
| Synthesis, structure and fluorescence analysis of three Zn(Ⅱ) complexes based on (1-methyl-1H-benzimidazol-2-yl) methanol |
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| 摘要: (1-甲基-1H-苯并咪唑-2-基)甲醇(HL)分别与Zn(NO3)2·6H2O和ZnCl2在甲醇和乙腈混合溶液中反应，生成了3个Zn(Ⅱ)配合物[Zn(HL)2Cl2](1)、[Zn(HL)2(H2O)2](NO3)2 (2)和[Zn4(L)4Cl4](3)。利用元素分析、IR、热重和单晶X 射线衍射对它们的结构进行分析，测试结果表明1和2是单核配合物，3属于四核配合物。热重分析结果表明，这些配合物具有良好的热稳定性，当温度超过180 ℃时结构才开始分解。荧光分析表明配合物1和2发生了红移现象，当配体失去质子H后，配合物3发生了明显的蓝移现象。配合物1、2和3的量子产率分别为1.00%、0.78%和2.04%，荧光寿命分别为2.306 0、2.283 6和3.039 9 ns。因此，可以通过使配体失去质子H形成多核配合物来增强荧光寿命。 |
| 关键词: 配合物 晶体 结构 荧光 |
| 基金项目: 广西高校中青年教师科研基础能力提升项目(No.2023KY0710)、 广西自然科学基金(No.2019GXNSFBA245063， 桂科 AD23026019)和国家级大学生创新创业训练项目(No.20231135418)资助。 |
| Abstract: The (1-methyl-1H-benzimidazol-2-yl) methanol (HL) reacted with Zn(NO3)2·6H2O and ZnCl2 in a mixture of methanol and acetonitrile to generate three Zn (Ⅱ) complexes: [Zn(HL)2Cl2] (1), [Zn(HL)2(H2O)2] (NO3)2 (2), and [Zn4(L)4Cl4] (3). Their structures were analyzed by elemental analysis, IR, thermogravimetry, and single - crystal X-ray diffraction. The results show that 1 and 2 are mononuclear complexes, and 3 is a tetranuclear complex. The thermogravimetric analysis results show that these complexes had good thermal stability and the structure began to decompose when the temperature exceeded 180 ℃. The fluorescence analysis shows that complexes 1 and 2 had a red shift phenomenon, and when the ligand lost proton H, complex 3 had a significant blue shift phenomenon. The quantum yields of complexes 1, 2, and 3 were 1.00%, 0.78%, and 2.04%, respectively. And the fluorescence life-times were 2.306 0, 2.283 6, and 3.039 9 ns, respectively. Therefore, it is possible to enhance the fluorescence life-time by causing the ligand to lose proton H and form a polynuclear complex. |
| Keywords: complex crystal structure fluorescence |
| 投稿时间：2023-03-25 修订日期：2023-06-06 |
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