A Pillar[6]arene‐[2]pseudorotaxane Based pH‐Sensitive Molecular Switch. Issue 3 (9th March 2015)

• Record Type: Journal Article
• Authors: Chen, Huanqing; Jia, Xueshun; Li, Chunju
• Is Part Of: Chinese journal of chemistry. Volume 33:Issue 3(2015:Mar.)
• Page Start: 343
• Page End: 345
• Publication Date: 2015-03-09
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201500074
• Languages: English
• ISSNs: 1001-604X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A novel pH‐responsive [2]pseudorotaxane based on ethylated pillar[6]arene and bis(1, 2, 3‐triazolium)butane cation was constructed. The dethreading and rethreading could be reversibly controlled by adding base and acid, <italic>i.e.</italic>, the deprotonation and reprotonation of the guest. In contrast, such responsible switching behavior does not occur for the complexation between the guest and ethylated pillar[5]arene, since both the cationic axle and the deprotonated one can be strongly bound by ethylated pillar[5]arene. Furthermore, the bis(1, 2, 3‐triazolium)butane⊂pillar[6]arene‐[2]pseudorotaxane can also disassemble upon the addition of competitive ethylated pillar[5]arene.</p> </abstract>