| 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2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4个晶体学独立的铅离子中心:Pb(1)O6、Pb(2)O6、Pb(3)O5和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: 国家自然科学基金(No.214711041)资助项目。 |
| Abstract: Hydrothermal reactions of Pb(NO3)2/3-fluorophthalic 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-fluorobenzoate(Fba) results from the in 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 to Pb(Ⅱ) ions.Complex 2 possesses a Pb-OH-Pb chain structure involving tetrahedron [Pb4(μ4-OH)4]4+ units with four crystallographically independent Pb(Ⅱ) polyhedral: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 sense to nitrobenzene via a fluorescence quenching mechanism.CCDC:1055033, 1; 1055034, 2. |
| 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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| 屈相龙,宋爽,赵凯,李夏.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[J].无机化学学报,2016,32(4):669-676. |
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