Construction of a functional [2]rotaxane with multilevel fluorescence responses
作者:Yingjie Zhao、Yongjun Li、Siu-Wai Lai、Jien Yang、Chao Liu、Huibiao Liu、Chi-Ming Che、Yuliang Li
DOI:10.1039/c1ob06151h
日期:——
A rotaxane incorporating three different stations and fluorescent states (output) was prepared. The movement of the macrocycle can be easily detected by fluorescence change as an output signal and the macrocycle could be easily controlled to locate on three different stations of the thread by the tuning of acid/base (input).
Self-templated synthesis of amide catenanes and formation of a catenane coordination polymer
作者:James E. M. Lewis
DOI:10.1039/c9ob00107g
日期:——
isophthalamide [2]catenanes of various sizes in up to 51% yield without the need for metal ions as templates or mediators of covalent bond formation. Using this strategy a bis-monodentate catenane was prepared incorporating exohedral pyridine units. Upon complexation of this ligand with AgOTf a one-dimensional coordination polymer was obtained in the solid state in which both macrocycles of the catenane are involved
A Dual-Response [2]Rotaxane Based on a 1,2,3-Triazole Ring as a Novel Recognition Station
作者:Haiyan Zheng、Weidong Zhou、Jing Lv、Xiaodong Yin、Yongjun Li、Huibiao Liu、Yuliang Li
DOI:10.1002/chem.200901841
日期:2009.12.7
stations when the bridge between them is shortened. Upon deprotonation of both [2]rotaxanes, the macrocycle moves towards the triazole recognition site due to the hydrogen‐bond interaction between the triazole nitrogen atoms and the amide groups in the macrocycle. Upon addition of chloride anion, the conformation of [2]rotaxane is changed because of the cooperative recognition of the chloride anion by a
Cu I合成了两种新颖的含铵和三唑站的多级可切换[2]轮烷。催化的叠氮化物-炔烃环加成反应。在两个氢键工位之间含有C6链桥的[2]轮烷的大环对质子化形式的铵阳离子表现出很高的选择性。有趣的是,当缩短两个识别站之间的桥梁时,大环能够与两个识别站进行交互。当两种[2]轮烷烷去质子化时,由于三唑氮原子与大环中酰胺基团之间的氢键相互作用,大环向三唑识别位点移动。加入氯阴离子后,[2]轮烷的构型发生了变化,因为大环间苯二甲酰胺和三唑CH质子的氢键供体对氯阴离子的协同识别。
Charge Transfer Chromophore-Stopped [2]Rotaxane through [2 + 2] Cycloaddition
Three charge-transfer chromophore-terminated [2]rotaxanes were synthesized, using a high-yield [2 + 2]cycloaddition reaction in apolar solvent at room temperature. Two solvent-driving molecular shuttles were constructed, which exhibit distinct conformations in different solvent as a result of the shuttling movement of the macrocycle.
New switchable [2]pseudorotaxanes formed by pyridine N-oxide derivatives with diamide-based macrocycles
Pyridine N-oxide derivatives are capable of formation of stable [2]pseudorotaxanes with diamide-based macrocycles in solution and in the solid state, and their dethreading/rethreading movements can be easily controlled by acid–base stimuli.