| 竞争配位合成的2-硝基苯甲酸根保护的一维Co(Ⅱ)/Zn(Ⅱ)配合物 | |
| Competitive coordination in 2-nitro benzoate protected one-dimensional Co(Ⅱ)/Zn(Ⅱ) complexes | |
| 摘要: 分别以乙酰丙酮钴Co(acac)3和乙酰丙酮锌Zn(acac)2为前驱体，2-硝基苯甲酸(2-nbaH)为配体，在甲苯中进行溶剂热反应，得到了3种一维配合物[Co(H2O)(2-nba)2]n(Co-1)、[Co3(2-nba)4(acac)2]n(Co-2)和[Zn2(2-nba)4]n(Zn-3)。对配合物进行了元素分析、红外光谱、单晶X射线衍射和紫外可见漫反射表征。在配合物Co-1中，每个Co2+离子与2个桥联水分子和4个2-nba-离子配位，形成八面体构型。当2-nba-不足时，前驱体中的配体acac-会与Co2+成键，得到局部结构不同的一维配合物Co-2。最突出的是，Co-2中三分之二的Co2+离子呈现三角双锥构型，而另外三分之一的Co2+离子与Co-1相似。Co配合物的合成方法也成功地应用于Zn(acac)2，得到了一维zigzag形的配合物Zn-3。配合物Zn-3中，Zn2+离子表现为仅由2-nba-保护的{ZnO4}四面体构型。研究表明，2-nba-与acac-的竞争配位可以显著影响Co2+离子的配位环境。 | |
| 关键词: 一维配合物 竞争配位 2-硝基苯甲酸 钴 锌 | |
| 基金项目: 国家自然科学基金(No.21972080，21503123，21871167)、三晋学者和山西省“1331工程”重点创新团队资助。 | |
| Abstract: Using tris(acetylacetonato)cobalt(Ⅲ) (Co(acac)3) and zinc(Ⅱ) acetylacetonate (Zn(acac)2) as precursors and 2-nitrobenzoic acid (2-nbaH) as ligand, three 1D complexes[Co(H2O)(2-nba)2]n(Co-1),[Co3(2-nba)4(acac)2]n(Co-2), and[Zn2(2-nba)4]n (Zn-3) were obtained by solvothermal reaction in toluene. The complexes were characterized by elemental analysis, IR spectroscopy, single-crystal X-ray diffraction, and UV-Vis diffuse reflectance spectroscopy. In complex Co-1, each Co2+ ion is coordinated by two bridged water molecules and four 2-nba- ions to form an octahedron geometry. When 2-nba- was not sufficient, the acac- ligands from the precursor were involved in the bonding with Co2+, leading to another 1D complex Co-2 with a different local structure. Most prominent is that two-thirds of the Co2+ ions in Co-2 are pentagonal triangular-dipyramid, while the other one-third is similar to that of Co-1. The synthetic method for Co was also successfully applied to Zn(acac)2 to give a 1D zigzag-shaped Zn-3. In complex Zn-3, the Zn2+ ions exhibited the {ZnO4} tetrahedral geometry protected only by 2-nba- ions. The results show that the competitive coordination between 2-nba- and acac- can significantly affect the coordination environment of Co2+ ions. | |
| Keywords: one-dimensional complex competitive coordination 2-nitrobenzoic acid cobalt zinc | |
| 投稿时间：2023-02-17 修订日期：2023-05-09 | |
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| 崔晓琴,王佃慧,李鑫,王雨欣,李婷,董婧,李欢.竞争配位合成的2-硝基苯甲酸根保护的一维Co(Ⅱ)/Zn(Ⅱ)配合物[J].无机化学学报,2023,39(8):1579-1586. | |
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