1‐D Open‐Channeled 3‐D Supramolecular Self‐Assembled Frameworks Encapsulating Unprecedented Cyclic (H2O)8 Clusters or Solvent Molecules
1‐D Open‐Channeled 3‐D Supramolecular Self‐Assembled Frameworks Encapsulating Unprecedented Cyclic (H2O)8 Clusters or Solvent Molecules
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DOI：
10.1002/ejic.200500088
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发表时间：
2005-07
影响因子：
2.3
通讯作者：
Dongsheng Li;Yaoyu Wang;X. Luan;Ping Liu;Cai-Hua Zhou;Hai-Rui Ma;Q. Shi
中科院分区：
文献类型：
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作者：
Dongsheng Li;Yaoyu Wang;X. Luan;Ping Liu;Cai-Hua Zhou;Hai-Rui Ma;Q. Shi
以Hhbd配体为桥，螯合芳族配体为末端配体，采用相同的构筑策略，合理设计合成了两种新型一维配位聚合物{[Cu（Hhbd）（bpy）]·3 H2O}n（1）和{[Cu（Hhbd）（phen）]·H2O·MeOH}n（2）[Hhbd = α-羟基丁二酸二阴离子，bpy = 2，2 '-联吡啶，phen = 1，10-菲咯啉].有趣的是，Hhbd配体上的-OH基团和螯合芳香配体在聚合物配位链的自组装中起着重要作用，它们为π-π芳香堆积和氢键相互作用提供了潜在的超分子识别位点，导致分子双链的自组装，得到具有一维开放通道的三维超分子框架。更重要的是，在1的主机框架封装前所未有的中心对称的环状（H2O）8集群，具有椅子构象，并连接到1-D阵列的超分子协会沿着1-D开放通道。相比之下，2的通道包含晶格水和无序的甲醇分子。TGA和XRPD表明，当从通道中除去客体溶剂分子时，1和2的主体框架是稳定的。变温磁化率测量两个配合物表明相邻的铜（II）离子之间的弱反铁磁交换相互作用的存在。（© Wiley-VCH Verlag GmbH & Co. KGaA，69451魏因海姆，德国，2005）
Two novel 1-D coordination polymers, {[Cu(Hhbd)(bpy)]·3H2O}n (1) and {[Cu(Hhbd)(phen)]·H2O·MeOH}n(2) [Hhbd = α-hydroxybutanedioicate dianion, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline], were rationally designed and synthesized with an identical construction strategy, using Hhbd ligands as bridges and chelating aromatic ligands as terminal ligands. Interestingly, the chelating aromatic ligand and the –OH groups of the Hhbd ligand play an important role in the self-assembly of the polymeric coordination chain by providing potential supramolecular recognition sites for π–π aromatic stacking and hydrogen-bond interactions, resulting in the self-assembly of the molecular double chains to give a 3-D supramolecular framework with 1-D open channels. More significantly, in 1 the host framework encapsulates unprecedented centrosymmetric cyclic (H2O)8 clusters that have a chair conformation and are connected into 1-D arrays by supramolecular association along the 1-D open channels. In contrast, the channels of 2 contain lattice water and disordered methanol molecules. TGA and XRPD show that the host frameworks of 1 and 2 are stable when the guest solvent molecules are removed from the channels. Variable-temperature magnetic susceptibility measurements for both complexes indicate the presence of weak antiferromagnetic exchange interactions between adjacent copper(II) ions. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)