Chiral eighteen-component three-dimensional supramolecular entities stabilized by the hydrogen bonding and coordination interactions

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• 作者：Shi-Gui Chen ; Yong-Chun Fu ; Gui-Tao Wang ; Guang-Yu Li ; Yuguo Ma ; Xi-Kui Jiang ; Zhan-Ting Li
• 关键词：Supramolecular chirality ; Hydrogen bonding ; Coordination interaction ; Porphyrin ; Bipyridyl
• 刊名：Tetrahedron
• 出版年：2010
• 出版时间：5 June 2010
• 年：2010
• 卷：66
• 期：23
• 页码：4057-4062
• 全文大小：463 K

文摘

A new class of chiral eighteen-component three-dimensional supramolecular entities has been assembled in toluene and chloroform from twelve zinc porphyrin-appended 2-(ethylamino)- pyrimido[4,5-b][1,8]naphthyridin-4(3H)-one monomers and six chiral bipyridyl compounds. The heterocyclic segments form two C₆-symmetric cyclic hexamers, which are stabilized by a well-established DDA–AAD hydrogen bonding motif, while the six chiral bispyridine ligands are coordinated to the corresponding zinc porphyrin units to give the two-layered architectures. The structures have been characterized by the ¹H NMR, UV–vis and circular dichroism experiments, which also reveals that, when the concentration of the monomers is high enough, the chiral supramolecular entity can be formed exclusively.