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具有可光切换分子封装的动态四化宏循环

Huang Wu^1,2, Yong Chen¹, Long Zhang²

¹College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , 94 Weijin Road, Nankai District , Tianjin 300071 , P. R. China.

Journal of the American Chemical Society

|November 27, 2018

概括

研究人员开发了一种光和热响应的宏循环,OPVEx²Box⁴⁺,通过光和热来控制分子结合. 这种分子开关可逆地绑定客人, 为先进的分子机器提供新的可能性.

科学领域:

超分子化学
材料科学
有机化学

背景情况:

为受控的主机-客户互动设计响应的宏观循环是复杂的.
需要外部刺激来控制分子容器功能,如溶解和分离.
具有光和热反应的元素可以精确控制分子过程.

研究的目的:

设计一个半刚性四旋风机,OPVEx2盒4+,具有光和热响应能力.
在光和热刺激下研究 (EE) 和 (EZ) 异构体之间的可逆切换.
通过外部刺激来证明宿主与客人的结合性.

主要方法:

合成一种新型的四基旋,其中包含基 (p-乙烯) 单元和扩展型基.
使用蓝光照射和加热来诱导可逆的异构变化.
使用电荷转移和范德瓦尔斯相互作用来描述不同旋风结构的客结合亲和力.

主要成果:

在OPVEx²Box⁴⁺旋中,在交替使用蓝光和热量时, (EE) 和 (EZ) 异构体之间的可逆性显著提高.
(EE) 配置有效地结合了富含电子 (例如,炭) 和缺电子 (例如,炭) 的客体.
蓝光照射通过转化为 (EZ) 异构体来关闭客体结合,在加热后恢复结合.

结论:

光和热作为有效的外部刺激来控制多响应的OPVEx²盒⁴⁺宏循环中的宿主-客互动.
可逆开关机制为设计先进的分子开关和机器提供了一个新的平台.
这项工作在外部可控制的分子识别和操纵方面取得了重大进展.

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