The carrot is better than the stick! Changes in the metal coordination geometry of the capping group in a [2]rotaxane ligand results in molecular switching by reorienting a trapped macrocyclic component (see picture). Switching was successfully initiated when the metal coordination site was made more attractive (square planar), but not when the metal coordination site was made less attractive (octahedral)
胡萝卜比棍棒更好![2]轮烷
配体中封端基团
金属配位几何形状的变化通过重新定位捕获的大环组分而导致分子转换(参见图片)。当使
金属配位点更具吸引力(正方形平面)时成功启动了切换,但是当使
金属配位点变得较不吸引力(八面体)时,切换成功。