Dalvand Parastoo, Nchimi Nono Katia, Shetty Dinesh, Benyettou Farah, Asfari Zouhair, Platas-Iglesias Carlos, Olson Mark A, Trabolsi Ali, Elhabiri Mourad
Université de Strasbourg, Université de Haute-Alsace, CNRS, LIMA UMR 7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel 67000 Strasbourg France
Department of Inorganic Chemistry, Faculty of Science, University of Yaoundé 1 Yaoundé Cameroon.
RSC Adv. 2021 Sep 2;11(47):29543-29554. doi: 10.1039/d1ra05488k. eCollection 2021 Sep 1.
Two calix[4]arene systems, C23 and C24 - where 2 corresponds to the number of viologen units and 3-4 corresponds to the number of carbon atoms connecting the viologen units to the macrocyclic core - have been synthesized and led to the formation of [3]pseudorotaxanes when combined with either CB[7] or CB[8]. The [3]pseudorotaxanes spontaneously dissociate upon reduction of the bipyridinium units as the result of intramolecular dimerization of the two face-to-face viologen radical cations. CB[7] and CB[8]-based [2]pseudorotaxanes containing monomeric viologen guest model compounds, MC3 and MC, do not undergo decomplexation and dimerization following electrochemical reduction of their bipyridinium units.
两种杯[4]芳烃体系，C23和C24（其中2对应于紫精单元的数量，3 - 4对应于将紫精单元连接到大环核心的碳原子数量）已被合成，并且当与CB[7]或CB[8]结合时会导致[3]准轮烷的形成。由于两个面对面的紫精自由基阳离子的分子内二聚作用，[3]准轮烷在联吡啶单元还原时会自发解离。含有单体紫精客体模型化合物MC3和MC的基于CB[7]和CB[8]的[2]准轮烷在其联吡啶单元进行电化学还原后不会发生解络合和二聚作用。
