Coordination-Driven Self-Assembly of Complexes Constructed from Two Helical Ligands: Synthesis, Structures, and Selective Gas Adsorption Properties.
Coordination-Driven Self-Assembly of Complexes Constructed from Two Helical Ligands: Synthesis, Structures, and Selective Gas Adsorption Properties.
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DOI：
10.1021/acs.inorgchem.2c03448
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发表时间：
2022-11
影响因子：
4.6
通讯作者：
Chao Huang;Hua Tian;Rong-Feng Li;Ying Xiong;Tao Jiang;Dong-Mei Chen;B. Zhu
中科院分区：
文献类型：
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作者：
Chao Huang;Hua Tian;Rong-Feng Li;Ying Xiong;Tao Jiang;Dong-Mei Chen;B. Zhu
通过Schiff碱缩合反应合成了两个螺旋配体L1和L2。八个配合物，{[Zn（L1）I2]·H2O}n（1），[Cd 2（L1）2 I4（CH 3OH）2]（2），[Hg 2（L1）2 I4]（3），[Ag（L1）NO3]n（4），[Ag 2（L1）2（NO3）2DMSO]·H2O（5），{[Zn 2（L2）2Cl 4]·2CHCl 3}n（6），{[Ag（L2）]·NO3}n（7），和{[Ag（L2）NO3]·CH 3OH}n（8），基于这两种配体合成并表征了。晶体结构表明，这两种席夫碱化合物均以具有等量P-螺旋和M-螺旋的外消旋配体形式存在，这些外消旋配体与金属离子的组装可以通过手性自识别或自识别过程形成纯手性或杂手性配合物。配合物2、3和5以异手性金属大环化合物的形式存在，具有8字形构象。配合物1、6和8以一维同手性螺旋链配位聚合物的形式存在，而配合物4和7以一维异手性螺旋链配位聚合物的形式存在。此外，气体和蒸汽吸附测量表明，所有的合成的配合物表现出良好的选择性吸附能力，对甲醇和乙醇蒸气超过N2，H2，和O2。
Two helical ligands (L1 and L2) were designed and synthesized by a Schiff base condensation reaction. Eight complexes, {[Zn(L1)I2]·H2O}n (1), [Cd2(L1)2I4(CH3OH)2] (2), [Hg2(L1)2I4] (3), [Ag(L1)NO3]n (4), [Ag2(L1)2(NO3)2DMSO]·H2O (5), {[Zn2(L2)2Cl4]·2CHCl3}n (6), {[Ag(L2)]·NO3}n (7), and {[Ag(L2)NO3]·CH3OH}n (8), were synthesized and characterized based on these two ligands. The crystal structures show that both Schiff base compounds exist as racemic ligands with equal amounts of P- and M-helicity, and the assembly of these racemic ligands with metal ions can lead to homochiral or heterochiral complexes via a chiral self-recognition or self-discrimination process. Complexes 2, 3, and 5 exist as heterochiral metallomacrocycles with a figure-eight conformation. Complexes 1, 6, and 8 exist as one-dimensional (1D) homochiral helical chain coordination polymers, while complexes 4 and 7 exist as 1D heterochiral helical chain coordination polymers. Furthermore, gas and vapor adsorption measurements show that all of the synthesized complexes exhibit good selective adsorption capacities toward methanol and ethanol vapor over N2, H2, and O2.