| 温度控制的原位脱羧3-氟邻苯二甲酸与铅（II）配位聚合物的合成，晶体结构及荧光性质 |
| Temperature- dependent formation of lead(II) coordination polymers with 3-fuorophthalic acid involving in situ decarboxylation: Syntheses, structures and fluorescence properties |
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| 摘要: Pb(NO3)2与3-氟邻苯二甲酸(H2Fpht)和2,2'-联吡啶(bpy) 在不同水热反应温度下获得了两个新的配位聚合物：[Pb(Fba)(bpy)(NO3)]n (1) 和 [Pb4O2(Fba)4]n (2)。3-氟邻苯二甲酸配体经由原位脱羧生成了3-氟苯甲酸根(Fba)。配合物1具有Pb-NO3-Pb双螺旋链结构，是由硝酸根桥联四方反棱柱[PbO6N2]结构单元而形成，而Fba与bpy配体螯合配位于中心铅离子。配合物2为Pb-OH-Pb链状结构，包含四面体结构单元[Pb4(μ4-OH)4]4+，且具有四个晶体学独立的铅离子中心，Pb(1)O6, Pb(2)O6, Pb(3)O5 and Pb(4)O5。这两个配合物链分别经氢键作用力自组装为三维超分子网络结构。室温下,测定了配合物的固体荧光光谱，均显示为基于配体的荧光发射。有意思的是，通过荧光淬灭机理配合物2可以选择性地检测硝基苯。 |
| 关键词: 铅配合物 3-氟邻苯二甲酸 晶体结构 荧光 |
| 基金项目: |
| Abstract: Hydrothermal reactions of Pb(NO3)2/3-?uorophthalic acid (H2Fpht)/2,2′-bipyridine (bpy) involving in situ decarboxylation at different temperatures gave two coordination polymers, [Pb(Fba)(bpy)(NO3)]n (1) and [Pb4O2(Fba)4]n (2). The 3-?uorobenzoate (Fba) results from in the situ decarboxylation of H2Fpht. Complex 1 shows a Pb-NO3-Pb double helical chain structure, which consists of [PbO6N2] square antiprism polyhedra by tetradentate nitrate bridge. The Fba and bpy as chelating ligands bond Pb(II) ions. Complex 2 possesses a Pb-OH-Pb chain structure involving tetrahedron [Pb4(μ4-OH)4]4 unites with four crystallographically independent Pb(II) polyhedra, Pb(1)O6, Pb(2)O6, Pb(3)O5 and Pb(4)O5. Moreover, hydrogen bonds between infinite chains lead to the formation of interesting 3D supramolecular architectures of 1 and 2. Fluorescence of complexes 1 and 2 were recorded at room temperature. The two complexes exhibit emission from the ligands. Interestingly, complex 2 can selectively sensitive to nitrobenzene via a fluorescence quenching mechanism. |
| Keywords: Lead complex 3-Fuorophthalic acid Crystal structure Fluorescence |
| 投稿时间：2015-10-21 修订日期：2016-01-18 |
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