Light-harvesting in multichromophoric rotaxanes.
Light-harvesting in multichromophoric rotaxanes.
复制标题
多发色轮烷中的光捕获。
作者：
M. Gallina;Bilge Baytekin;C. Schalley;P. Ceroni
通过阴离子模板效应，合成了两个具有苄基醚轴和四内酰胺轮烷的轮烷化合物。它们携带附着在塞子基团上的萘发色团和附着在车轮上的芘发色团。这两种轮烷之间的区别由萘基发色团与轮烷基轴的连接单元来表示：三氮唑或炔基。这两种轮烷都具有很好的捕光性能：在两种情况下，都能激发发色团，并将能量转移到芘单元，效率均高于90%。这代表了属于机械互锁部件的发色团之间的捕光功能的一个例子，即轮烷的轴和轮。
Two rotaxanes with benzyl ether axles and tetralactam wheels were synthesized through an anion template effect. They carry naphthalene chromophores attached to the stopper groups and a pyrene chromophore attached to the wheel. The difference between the two rotaxanes is represented by the connecting unit of the naphthyl chromophore to the rotaxane axle: a triazole or an alkynyl group. Both rotaxanes exhibit excellent light-harvesting properties: excitation of the naphthalene chromophores is followed by energy transfer to the pyrene unit with efficiency higher than 90% in both cases. This represents an example of light-harvesting function among chromophores belonging to mechanically interlocked components, that is, the axle and the wheel of the rotaxanes.