title: A novel strategy to assemble achiral ligands to chiral helical polyrotaxane structures.
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.
authors.affiliation: Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China.
authors.forename: Jin-Ping
authors.initials: JP
authors.lastname: Zeng
authors.forename: Hang
authors.initials: H
authors.lastname: Cong
authors.forename: Kai
authors.initials: K
authors.lastname: Chen
authors.forename: Sai-Feng
authors.initials: SF
authors.lastname: Xue
authors.forename: Yun-Qian
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Qian-Jiang
authors.initials: QJ
authors.lastname: Zhu
authors.forename: Jing-Xin
authors.initials: JX
authors.lastname: Liu
authors.forename: Zhu
authors.initials: Z
authors.lastname: Tao
mesh_terms: D018360:Crystallography, X-Ray; D003505:Cyclodextrins / Q000138:chemical synthesis / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D020442:Poloxamer / Q000138:chemical synthesis / Q000737:chemistry*; D011789:Quantum Theory; D043862:Rotaxanes / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D003505:Cyclodextrins; D008024:Ligands; D043862:Rotaxanes; C475673:polyrotaxane; D020442:Poloxamer