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通过刚性纳二胺三角形的超分子

Yassine Beldjoudi, Ashwin Narayanan¹, Indranil Roy

¹Department of Medicine and Simpson-Querrey Institute , Northwestern University , Chicago , Illinois 60611 , United States.

Journal of the American Chemical Society

|September 19, 2019

概括

研究人员研究了有机分子如何自组合成二维电子材料. 他们发现溶剂的选择和度控制了特定模块的形成,创造了具有潜在电子应用的新型超分子结构.

科学领域:

超分子化学
材料科学
有机电子产品

背景情况:

通过π·π和电荷转移 (CT) 相互作用对有机多边形进行测量,可以构建二维超分子有机电子材料.
基于纳二胺的分子三角形 (NDI-Δ) 是这种材料的关键构件.

研究的目的:

探索由NDI-Δ形成的二维图形的3D拓.
研究溶剂和溶解物度对NDI-Δ自组合的影响.
通过CT相互作用来检查NDI-Δ和四亚 (TTF) 之间的共同晶体的形成.

主要方法:

使用非化溶剂进行NDI-Δ的自组装.
在各种溶剂中 (MeCN,CHCl3,CH2Cl2) 与NDI-Δ一起结晶.
固态光谱调查和TDDFT计算

主要成果:

在特定的溶剂和度中,NDI-Δ自组装成二维蜂三角形和六角形.
使用TTF的共结晶产生不同的2D图形 (CT-A,CT-B,CT-C),通过溶剂和石化计控制.
由于TTF封闭,CT-A超结构具有增强的CT特征,具有NIR吸收带.
CT-B 超结构具有六角溶剂网格和三角形NDI-Δ网格.
CT-C 超结构呈现出 NDI-Δ 和 TTF-Δ 的 3+3 蜂巢,其 2500 nm 吸收带归因于混合价值 TTF.

结论:

溶剂调制对于控制 NDI-Δ 和 TTF 超分子结构的自组,静态测量和晶体包装至关重要.
该研究通过精确控制分子间相互作用和溶剂效应来证明二维模块化有机电子材料的合理设计.
观察到的超分子结构和电子特性突显了开发先进有机电子设备的潜力.

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