Self-Assembled Carcerand-like Cage with a Thermoregulated Selective Binding Preference for Purification of High-Purity C60 and C70.
Self-Assembled Carcerand-like Cage with a Thermoregulated Selective Binding Preference for Purification of High-Purity C60 and C70.
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DOI：
10.1021/acs.joc.8b02674
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
Weidong Sun;Ying Wang;Lishuang Ma;Lu Zheng;Weihai Fang;Xuebo Chen;Hua Jiang
中科院分区：
文献类型：
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作者：
Weidong Sun;Ying Wang;Lishuang Ma;Lu Zheng;Weihai Fang;Xuebo Chen;Hua Jiang
富勒烯分子由于其独特的弯曲芳香π共轭体系而引起了人们极大的兴趣。然而，纯化高纯度富勒烯的复杂和昂贵的技术阻碍了这些有吸引力的分子的容易获得，从而限制了大多数富勒烯的应用。在这里，我们报告的发现carcerand-like笼作为一个独立的主机有效的分离和纯化C60和C70的富勒烯烟灰。通过金属配位的自组装构建的笼能够定量地封装富勒烯C60和C70。由于富勒烯和corannulenes之间具有精确限定尺寸的小裂缝，多种有利的CH-π相互作用以及凹凸芳香相互作用，富勒烯复合物在高温下高度稳定。更重要的是，这种笼状结构对C60的选择性结合具有温度依赖性，这使得我们能够开发出一种高效的绿色方法，用于从富勒烯烟灰中分离出高纯度和低质量损失的C60和C70，而无需重结晶或高效液相色谱。
Fullerene molecules have attracted considerable interest because of the unique curved aromatic π-conjugated systems. However, the complicated and costly technologies for purification of highly pure fullerenes hamper easy access to these attractive molecules and consequently limit most of the fullerene applications. Here, we report the discovery of a carcerand-like cage acting as a stand-alone host for efficient separation and purification of C60 and C70 from fullerene soot. The cage, built through the self-assembly of metal coordination, is capable of quantitatively encapsulating fullerenes C60 and C70. The fullerene complexes are highly stable at high temperatures because of the small crevices with precisely defined sizes, multiple favorable CH-π interactions, and concave-convex aromatic interaction between fullerenes and corannulenes. Importantly, the carcerand-like cage shows a temperature-dependent selective binding preference for C60 over C70, which allows us to develop an efficient and green procedure for isolating C60 and C70 with high purity and low mass loss from fullerene soot without the help of recrystallization or high-performance liquid chromatography.