Time Programmable Locking/Unlocking of the Calix[4]arene Scaffold by Means of Chemical Fuels
作者:Daniele Del Giudice、Emanuele Spatola、Roberta Cacciapaglia、Alessandro Casnati、Laura Baldini、Gianfranco Ercolani、Stefano Di Stefano
DOI:10.1002/chem.202002574
日期:2020.11.20
2‐cyano‐2‐phenylpropanoic acid and its p‐Cl, p‐CH3 and p‐OCH3 derivatives can be used as chemical fuels to control the geometry of the calix[4]arene scaffold in its cone conformation. It is shown that, under the action of the fuel, the cone calix[4]arene platform assumes a “locked” shape with two opposite aromatic rings strongly convergent and the other two strongly divergent (“pinched cone” conformation). Only when
在这项工作中,我们报道了2-氰基-2-苯基丙酸和其p -Cl,p -CH 3和p -OCH 3衍生物可用作化学燃料,以控制其圆锥构象的杯[4]芳烃骨架的几何形状。结果表明,在燃料的作用下,圆锥杯[4]芳烃平台呈“锁定”形状,两个相对的芳环强烈会聚,另外两个强烈发散(“夹锥”构象)。仅当燃料耗尽时,圆锥杯[4]芳烃支架才会恢复其静止的“解锁”形状。值得注意的是,“锁定”状态的持续时间可以通过改变燃料结构或数量随意控制。该过程的动力学研究表明,燃料的消耗是由“解锁的”杯芳烃催化的,该杯芳烃充当其自身生产的自催化剂。提出了一种用于燃料消耗反应的机制。