| 含四烯基吡啶配体的Zn(Ⅱ)配位聚合物的合成、结构及其荧光性质 |
| Synthesis, structure, and fluorescence properties of Zn(Ⅱ) coordination polymers containing tetra-alkenylpyridine ligands |
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| 摘要: 在3，5-二硝基苯甲酸(3，5-HDNBA)、4-吡唑羧酸(4-H2PyC))或对乙基苯甲酸(4-HEBA)存在下，Zn (NO3)2·6H2O与1，2，4，5-四(4-乙烯基吡啶基)苯(tkpvb)发生溶剂热反应，制备了[Zn (tkpvb)(3，5-DNBA)2]n(CP1)、{[Zn (tkpvb)(4-PyC)]·2H2O]}n(CP2)和{[Zn (tkpvb)0.5(4-EBA)2]·H2O]}n(CP3)三种Zn (Ⅱ)基配位聚合物(CPs)。通过红外光谱、元素分析、粉末X射线衍射和单晶X射线衍射对它们进行了结构表征。CP1具有一维“之”字形链状结构，CP2和CP3则分别呈现六连接和四连接的三维拓扑结构。CP1~CP3均表现出光致发光现象，对无机金属离子有一定的响应性能。其中，Fe3+离子对CP1的荧光强度影响最大，检测限达到0.020 μmol·L-1。这可能是Fe3+与CP1中不配位的吡啶基之间的相互作用引起的。 |
| 关键词: 四烯基吡啶 配位聚合物 结构 荧光 金属离子检测 |
| 基金项目: 国家自然科学基金(No.22301204，21773163)和苏州市资源分子精准转化重点实验室(No.SZS201905)资助。 |
| Abstract: Solvothermal reactions of 3,5-dinitrobenzoic acid (3,5-HDNBA), 4-pyrazolecarboxylic acid (4-H2PyC)) or 4-ethylbenzoic acid (4-HEBA) with Zn(NO3)2·6H2O and 1,2,4,5-tetrakis(4-vinylpyridyl) benzene (tkpvb) gave rise to three kinds of coordination polymers (CPs), [Zn(tkpvb)(3,5-DNBA)2]n (CP1), {[Zn(tkpvb)(4-PyC)]·2H2O]}n (CP2), and {[Zn(tkpvb)0.5(4-EBA)2]·H2O}n (CP3). CP1 has a 1D zigzag chain structure composed of Zn(Ⅱ), tkpvb, and 4-EBA ligands. CP2 is a 3D topological structure that can be seen constructed from 2D [Zn(4-PyC)3]n layers connected by tkpvb ligands. CP3 holds a 4-connected 3D topological structure, where 1D channels are present. CP1-CP3 showed a fluorescence emission phenomenon, and they had certain responses to inorganic metal ions. Among them, Fe3+ ions had the greatest impact on the fluorescence intensity of CP1. In addition, after the addition of Fe3+, the fluorescence lifetime and fluorescence quantum yield of CP1 were significantly enhanced compared to CP2 and CP3, with a detection limit of 0.020 μmol·L-1. This may be due to the interaction between Fe3+ and the uncoordinated pyridine groups in CP1. |
| Keywords: tetravinylpyridine coordination polymer structure fluorescence metal ion detection |
| 投稿时间：2024-05-07 修订日期：2024-07-12 |
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| 桑笑,刘琦,郎建平.含四烯基吡啶配体的Zn(Ⅱ)配位聚合物的合成、结构及其荧光性质[J].无机化学学报,2024,40(11):2124-2132. |
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| Support information: 相关附件： 20240158_Supporting_Information.docx |
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