| 柔性配体构筑的三个构象多样的镧系羧酸配位聚合物:合成,结构和荧光性质 |
| Three Lanthanide-Carboxylate Coordination Polymers with Conformation Variation Based on Flexible Ligands: Syntheses, Structures and Photoluminescence Properties |
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| 摘要: 利用2，2'-（1，4-亚苯基）二（亚苯基）二（硫基）苯二羧酸（H2L1）和2，2'-（2，3，5，6-四甲基-1，4-亚苯基）二（亚甲基）二（硫基）苯二甲酸（H2L2）2个柔性二羧酸分别与镧系金属盐反应，通过溶剂热方法合成了3个配位聚合物：{[（NH2（CH3）2][Nd（L1）2（DMF）]·2DMF}n（1）和{[Ln（L2）1.5（H2O）（DMF）2]·2DMF}n[Ln=Ce（2），Pr（3）]。利用元素分析、红外、粉末X射线衍射、热重分析等对配合物进行了表征。X射线单晶衍射分析表明：3个配合物均为二维的层状结构，并且2个配体在配合物中表现出不同的构象。（L1）2-在配合物1中表现出顺式和反式2种构象，（L2）2-在配合物2和3中仅表现出反式构象。此外，对配合物的热稳定性和荧光性质也进行了研究。 |
| 关键词: 配位聚合物 柔性配体 构象 荧光性质 |
| 基金项目: 国家自然科学基金（No.21171031）资助项目。 |
| Abstract: Reactions of flexible dicarboxylate ligands 2,2-(1,4-phenylenebis(methylene))bis(sulfanediyl)dibenzoic acid (H2L1) and 2,2-(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene)bis(sulfanediyl) dibenzoic acid (H2L2) with lanthanide metal salts under solvothermal conditions give rise to three lanthanide-organic coordination polymers (CPs), namely, {[(NH2(CH3)2][Nd(L1)2(DMF)]·2DMF}n(1) and {[Ln(L2)1.5(H2O)(DMF)2]·2DMF}n [Ln=Ce(2), Pr(3)] (DMF=N,N-dimethylformamide). All of the complexes have been structurally characterized by single-crystal X-ray diffraction analyses and characterized by elemental analysis, infrared spectra (IR), powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). All the complexes have two-dimensional (2D) layer structures, which can be simplified as (4,4) net. The ligands display different conformation. (L1)2- in complex 1 exhibits two kinds of conformations: syn-and anti-conformation, while (L2)2- in complexes 2 and 3 exhibits anti-conformation. Furthermore, the thermal stabilities and photoluminescence properties of the complexes were investigated. |
| Keywords: coordination polymers flexible ligand conformation photoluminescence property |
| 投稿时间：2015-12-25 修订日期：2016-05-10 |
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| 崔培培,崔论峰,符爱云.柔性配体构筑的三个构象多样的镧系羧酸配位聚合物:合成,结构和荧光性质[J].无机化学学报,2016,32(7):1231-1238. |
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