AUTHOR=Ma Longtao , Han Ying , Yan Chaoguo , Chen Tingting , Wang Yang , Yao Yong 

TITLE=Construction and Property Investigation of Serial Pillar[5]arene-Based [1]Rotaxanes

JOURNAL=Frontiers in Chemistry

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.908773

DOI=10.3389/fchem.2022.908773

ISSN=2296-2646

ABSTRACT=<p>Although the construction and application of pillar[5]arene-based [1]rotaxanes have been extensively studied, the types of stoppers for them are limited. In this work, we designed and prepared three series of pillar[5]arene-based [1]rotaxanes (<bold>P5[1]Rs</bold>) with pentanedione derivatives, azobenzene derivatives, and salicylaldehyde derivatives as the stoppers, respectively. The obtained <bold>P5[1]Rs</bold> were fully characterized by NMR (<sup>1</sup>H, <sup>13</sup>C, and 2D), mass spectra, and single-crystal X-ray analysis. We found that the synergic C–H···π, C–H···O interactions and N–H···O, O–H···N hydrogen bonding are the key to the stability of [1]rotaxanes. This work not only enriched the diversity of pillar[n]arene family but also gave a big boost to the pillar[n]arene-based mechanically interlocked molecules</p>