Kieffer Marion, Bilbeisi Rana A, Thoburn John D, Clegg Jack K, Nitschke Jonathan R
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
Department of Civil and Environmental Engineering, American University of Beirut, Beirut, Lebanon.
Angew Chem Int Ed Engl. 2020 Jul 6;59(28):11369-11373. doi: 10.1002/anie.202004627. Epub 2020 May 7.
Two Co L tetrahedral cages prepared from similar building blocks showed contrasting host-guest properties. One cage did not bind guests, whereas the second encapsulated a series of anions, due to electronic and geometric effects. When the building blocks of both cages were present during self-assembly, a library of five Co L L cages was formed in a statistical ratio in the absence of guests. Upon incorporation of anions able to interact preferentially with some library members, the products obtained were redistributed in favor of the best anion binders. To quantify the magnitudes of these templation effects, ESI-MS was used to gauge the effect of each template upon library redistribution.
由相似构建单元制备的两个Coₗ四面体笼展现出截然不同的主客体性质。一个笼子不结合客体，而另一个由于电子和几何效应能够包封一系列阴离子。当两个笼子的构建单元在自组装过程中同时存在时，在无客体的情况下以统计比例形成了一个包含五个Coₗₗ笼的库。加入能够优先与某些库成员相互作用的阴离子后，得到的产物重新分布，有利于最佳阴离子结合剂。为了量化这些模板效应的大小，采用电喷雾电离质谱（ESI-MS）来评估每个模板对库重新分布的影响。
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