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作为C₆₀和C₇₀受体的阿扎布基碗基分子

Motoki Takeda¹, Satoru Hiroto¹, Hiroki Yokoi¹

¹Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering , Nagoya University , Furo-cho, Chikusa-ku , Nagoya , Aichi 464-8603 , Japan.

Journal of the American Chemical Society

|April 18, 2018

概括

研究人员使用嵌入的buckybowls来选择性地结合C60和C70富勒烯. 这些子形成稳定的复合体,使得特定的富勒伦点具有可调的结合亲缘关系.

科学领域:

超分子化学
有机化学
材料科学

背景情况:

富勒烯 (C60和C70) 是具有独特电子性质的重要碳基.
分子是能够封装客分子的超分子宿主.
设计富勒烯的选择性宿主仍然是宿主-客体化学的一个挑战.

研究的目的:

设计和合成基于嵌入的分子子子.
研究这些针对C60和C70烯的结合亲和性和选择性.
探索由此产生的富勒烯-超分子复合物的结构,电子和光学特性.

主要方法:

嵌入的基于分子子的合成,具有不同的共价链接器.
使用光学光谱和质子核磁共振 (1H NMR) 定位的溶液状态结合研究.
通过X射线衍射进行固态结构分析.
电化学分析和密度函数理论 (DFT) 的计算.
非线性光学测量 (NLO)

主要成果:

成功合成了具有可调节的C60和C70结合强度的分子针.
建立了1:1复杂的固体测量和阐明了固体结构,显示针封装富勒伦.
已证明有选择性的结合:碳醇桥接子更喜欢C70,而氨酸桥接子更喜欢C60.
观察到富勒烯复合物的增强稳定性对抗氧化还原反应和色谱净化.
确定了分子间电荷转移相互作用和复合时增强的两光子吸收截面.

结论:

嵌入的buckybowl针为选择性烯识别提供了一个多功能平台.
连接器的设计对于调整腔体大小和实现对C60或C70的补充结合至关重要.
复杂化增强了稳定性,并改变了子和富勒伦的电子和光学特性.

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