UNAM-National Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey.
Org Lett. 2013 Mar 1;15(5):1012-5. doi: 10.1021/ol303495n. Epub 2013 Feb 11.
A bipyridinium dication-substituted Bodipy fluorophore, with a terminal carboxylic acid function, provides two alternative stations for cucurbit[7]uril. Changing pH from basic to acidic results in shuttling of the cucurbit[7]uril from one station to another. In addition, this shuttling is accompanied by a change in the emissive properties of the Bodipy dye, which is only observed in the presence of cucurbit[7]uril. More striking, is a demonstration of autonomous shuttling of the pseudorotaxane system in an oscillating pH system.
一种双吡啶二阳离子取代的 Bodipy 荧光团，带有末端羧酸官能团，为瓜环[7]脲提供了两个替代的结合点。将 pH 值从碱性变为酸性会导致瓜环[7]脲从一个结合点转移到另一个结合点。此外，这种穿梭伴随着 Bodipy 染料发光性质的变化，只有在存在瓜环[7]脲的情况下才会观察到这种变化。更引人注目的是，在 pH 值振荡系统中展示了伪轮烷体系的自主穿梭。
