An isolable catenane consisting of two Möbius conjugated nanohoops.

An isolable catenane consisting of two Möbius conjugated nanohoops.
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由两个莫比乌斯共轭纳米环组成的可分离索烷

DOI:
10.1038/s41467-018-05498-6
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发表时间:
2018-08-02
影响因子:
16.6
通讯作者:
Cong H
Cong H
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Fan YY;Chen D;Huang ZA;Zhu J;Tung CH;Wu LZ;Cong H

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除了数学上的重要性,莫比乌斯拓扑(扭曲的单边带)在分子水平上也很有趣,因为它具有结构优雅和独特的性质;然而,它带来了合成挑战。虽然一些莫比乌斯型分子已经被合成化学家分离出来,并伴随着广泛的计算研究,但稳定的莫比乌斯共轭分子的设计,制备和表征至今仍然是一项重要的任务,更不用说组装成更复杂拓扑结构的分子莫比乌斯带了。在这里,我们报告的有效合成,晶体结构,和理论研究的索烃组成的两个完全共轭nanohoops表现出莫比乌斯拓扑结构在固态。这项工作强调了oligoparphenylene衍生的nanohoops,一个高度扭曲和合成挑战性的共轭大环家族,不仅可以作为互锁超分子结构的构建模块,而且还代表了一类新的化合物,具有通过非共价相互作用稳定的可分离的莫比乌斯构象。表现出莫比乌斯拓扑结构的分子是迷人的,但具有挑战性的合成目标。在这里,作者报告了由两个完全共轭的互锁莫比乌斯纳米环形成的索烃的优雅合成和晶体结构,并使用理论计算来理解其构象稳定性和芳香性。
Besides its mathematical importance, the Möbius topology (twisted, single-sided strip) is intriguing at the molecular level, as it features structural elegance and distinct properties; however, it carries synthetic challenges. Although some Möbius-type molecules have been isolated by synthetic chemists accompanied by extensive computational studies, the design, preparation, and characterization of stable Möbius-conjugated molecules remain a nontrivial task to date, let alone that of molecular Möbius strips assembling into more complex topologies. Here we report the efficient synthesis, crystal structure, and theoretical study of a catenane consisting of two fully conjugated nanohoops exhibiting Möbius topology in the solid state. This work highlights that oligoparaphenylene-derived nanohoops, a family of highly warped and synthetically challenging conjugated macrocycles, can not only serve as building blocks for interlocked supermolecular structures, but also represent a new class of compounds with isolable Möbius conformations stabilized by non-covalent interactions. Molecules exhibiting Möbius topology are fascinating but challenging synthetic targets. Here, the authors report the elegant synthesis and crystal structure of a catenane formed from two fully conjugated, interlocked Möbius nanohoops, and use theoretical calculations to understand its conformational stability and aromaticity.
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影响因子: 15
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影响因子: 8.4
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