A switch in time: Gel–sol transitions of a urea‐based [2]rotaxane gelator are controlled by the degree of solvent exposure of the hydrogen‐bond‐donating urea station and the orientation of the hydrogen‐bond‐accepting CO groups of the interlocked ethylene glycol based macrocycle (N blue, O and macrocycle red, phenyl green). Both acid/base and anion‐exchange control can be used to reversibly transition
Dual-Way-Switchable Ester Rotaxanes Constructed Using the Recognition of Malonate Diesters
作者:Min-Xuan Zhang、Hung-Te Cheng、Sheng-Hsien Chiu
DOI:10.1021/acs.orglett.3c01666
日期:2023.7.7
US8952167B2
申请人:——
公开号:US8952167B2
公开(公告)日:2015-02-10
US9085548B2
申请人:——
公开号:US9085548B2
公开(公告)日:2015-07-21
Five additional macrocycles that allow Na<sup>+</sup> ion-templated threading of guest units featuring a single urea or amide functionality
作者:You-Han Lin、Chien-Chen Lai、Sheng-Hsien Chiu
DOI:10.1039/c3ob42418a
日期:——
Five analogues of the macrocycle BPX26C6 are also capable of recognizing single urea and/or amidefunctionalities in the presence of templating Na+ ions. We have unambiguously confirmed the formation of such [2]pseudorotaxane complexes in solution through syntheses of the corresponding [2]rotaxanes.