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Three 3D lanthanide-organic frameworks based on novel flexible multicarboxylates: From ssa to rtl topologies

机译:基于新型柔性多羧酸盐的三种3D镧系元素有机框架:从ssa到rtl拓扑

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摘要

Three lanthanide-organic frameworks have been solvothermally synthesized and characterized. Complex 1 {[Pr_2(bbda)(OH)_2(H 2O)_6]?12H_2O}_n (H _4bbda = 5,5′-(2,4,6-trimethyl-1,3-phenylene)bis(methylene) bis(oxy)diisophthalic acid) is a 3D porous framework belonging to a 2-nodal net with the ssa topology. The coordinated formate ligand from in situ hydrolyzation of dmf binds metal centers to generate rigid rod-shaped SBUs (secondary building units) in both complexes 2 and 3, [Ln(HCOO)(L~1)(dmf)] _n (Ln = Er (2), Tm (3), H_2L~1 = 2,2′-(2,3,5,6-tetramethyl-1,4-phenylene) bis(methylene)bis(sulfanediyl) dibenzoic acid, dmf = N,N′-dimethylformamide). The flexible ligand H _4bbda in complex 1 exhibits syn conformation, while the flexible ligand H_2L~1 in complexes 2 and 3 adopts anti conformation. The anti L~1 ligand links the rod-shaped SBUs to give 2 and 3 3D network with the rtl topology.
机译:溶剂热合成和表征了三种镧系元素-有机骨架。配合物1 {[Pr_2(bbda)(OH)_2(H 2O)_6]?12H_2O} _n(H _4bbda = 5,5'-(2,4,6-三甲基-1,3-亚苯基)双(亚甲基)双(氧基)二间苯二甲酸)是一种3D多孔骨架,属于具有ssa拓扑的2-节点网。 dmf原位水解产生的配位甲酸配体与金属中心结合,在复合物2和3中生成刚性棒状SBU(二级构建单元),[Ln(HCOO)(L〜1)(dmf)] _n(Ln = Er(2),Tm(3),H_2L〜1 = 2,2'-(2,3,5,6-四甲基-1,4-亚苯基)双(亚甲基)双(磺酰二基)二苯甲酸,dmf = N ,N′-二甲基甲酰胺)。配合物1中的柔性配体H _4bbda具有顺式构象,而配合物2和3中的柔性配体H_2L〜1具有反式构象。抗L〜1配体将杆状SBU连接起来,从而形成具有rtl拓扑的2和3 3D网络。

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