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首页> 外文期刊>Chemistry: A European journal >The effect of incorporating fré dendrons into rotaxanes and molecular shuttles contaning the 1,2-bis(pyridinium)ethane?[24]crown-8 templating motif
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The effect of incorporating fré dendrons into rotaxanes and molecular shuttles contaning the 1,2-bis(pyridinium)ethane?[24]crown-8 templating motif

机译：将fr树枝状晶体掺入轮状烷和含有1,2-双（吡啶）乙烷？[24] crown-8模板基序的分子穿梭物中的作用

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摘要

Fréchet-type dendrons (G0G3) were added as both axle stoppering units and cyclic wheel appendages in a series of [2]rotaxanes, [3]rotaxanes, and molecular shuttles that employ 1,2bis(pyridinium)ethane axles and 24membered crown ethers wheels. The addition of dendrimer wedges as stoppering units dramatically increased the solubility of simple [2]rotaxanes in nonpolar solvents. The X-ray structure of a G1-stoppered [2]rotaxane shows how the dendritic units affect the structure of the interlocked components. Increased solubility allows observation of how the interaction of dendritic units on separate components in interlocked molecules influences switching properties and molecular size. In a series of [2]rotaxane molecular shuttles incorporating two recognition sites, it was demonstrated that an increase in generation on either the stoppering unit or cyclic wheel could influence both the rate of shuttling and the site preference of the wheel on the axle.
机译：在一系列[2]轮烷，[3]轮烷以及采用1,2-双（吡啶）乙烷轮轴和24元冠醚轮的分子穿梭机中，将弗雷谢特型树突（G0G3）作为轴塞单元和循环轮附件添加。树枝状聚合物楔形物作为封闭单元的加入大大提高了简单的[2]轮烷在非极性溶剂中的溶解度。 G1封端的[2]轮烷的X射线结构显示了树枝状单元如何影响互锁组件的结构。增加的溶解度允许观察互锁分子中树突单元在单独成分上的相互作用如何影响转换特性和分子大小。在一系列包含两个识别位点的[2]轮烷分子穿梭分子中，证明了在塞子单元或循环轮上产生的增加会影响穿梭速率和轮轴在轴上的位置偏好。

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