可见光可切换的环和链在动态共价物 imine 化学
Jona Voss1,2, Yannic Hartmann1, Esther Nieland1
1Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, Düsseldorf, Germany.
Chemistry (Weinheim an der Bergstrasse, Germany)
|March 27, 2025
概括
红灯可切换的阿佐烯异构体与二胺形成了不同的宏循环. 链条的长度决定了自我组装,通过动态共价化学来控制光响应材料.
科学领域:
- 超分子化学 超分子化学
- 有机化学 有机化学
- 材料科学 材料科学 材料科学
背景情况:
- 阿佐烯衍生物是具有可调节性质的光响应分子.
- 功能化分子的自我组装为复杂结构提供了途径.
- 动态共价化学利用适应性材料的可逆反应.
研究的目的:
- 为了研究红灯可切换的ortho-difluoroazobenzene异构体与异性质二胺的自我组装.
- 了解胺链长度对宏循环形成和光响应性的影响.
- 探索这些系统在动态共价化学和适应性材料中的潜力.
主要方法:
- 合成功能化 орто-difluoroazobenzene异构体 (E-/Z-A) 的方法.
- 与各种异形二胺 (例如,-1,3-二胺,-1,4-二胺) 的反应.
- 使用单晶X射线衍射,19F-DOSY NMR,MALDI-MS和UV/Vis光谱学进行了表征.
主要成果:
- 自组装表现出基于二胺链长度 (奇数与偶数) 的交替行为.
- 偶数的二氨酸仅与Z-azobenzene同位素一起形成二氨酸宏循环.
- 奇数二胺形成可光切换的,定义的宏循环,包括E,E-A2X2类型,由X射线结构证实.
结论:
- 由甲基基数影响的二胺构造决定了反应性和自我组装结果.
- 精确控制宏循环结构和光反应性质是可以实现的.
- 基于亚的系统为开发先进的适应性材料提供了巨大的潜力.
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