A novel strategy to assemble achiral ligands to chiral helical polyrotaxane structures |
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Authors: | Zeng Jin-Ping Cong Hang Chen Kai Xue Sai-Feng Zhang Yun-Qian Zhu Qian-Jiang Liu Jing-Xin Tao Zhu |
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Affiliation: | Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China. |
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Abstract: | Using the achiral N,N'-bis(2-pyridylmethyl)-1,6-hexanediamine ligand bearing two end pyridyl groups as the source of conformational chirality, a novel type of TMeQ[6]-based helical polyrotaxane was prepared and characterized by X-ray crystallography and (1)H NMR spectroscopy. The chirality of the polyrotaxane was generated from twisting of the hexylidene of the N,N'-bis(2-pyridylmethyl)-1,6-hexanediamine "string" when bound within the hydrophobic cavity of TMeQ[6]. Two opposite chiral helical polyrotaxanes crystallize as a racemic compound. |
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