Synthesis of Carborane-Backbone Metallacycles for Highly Selective Capture of n-Pentane,Journal of the American Chemical Society

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Synthesis of Carborane-Backbone Metallacycles for Highly Selective Capture of n-Pentane
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2022-11-28 , DOI: 10.1021/jacs.2c10201
Shu-Ting Guo ₁ , Peng-Fei Cui ₁ , Xin-Ran Liu ₁ , Guo-Xin Jin _{1,

2}

Affiliation

The specific recognition and separation of alkanes with similar molecular structures and close boiling points face significant scientific challenges and industrial demands. Here, rectangular carborane-based metallacycles were designed to selectively encapsulate n-pentane from n-pentane, iso-pentane, and cyclo-pentane mixtures in a simple-to-operate and more energy-efficient way. Metallacycle 1, bearing 1,2-di(4-pyridyl) ethylene, can selectively separate n-pentane from these three-component mixtures with a purity of 97%. The selectivity is ascribed to the capture of the preferred guest with matching size, C–H···π interactions, and potential B–H^δ−···H^δ+–C interactions. Besides, the removal of n-pentane gives rise to original guest-free carborane-based metallacycles, which can be recycled without losing performance. Considering the variety of substituted carborane derivatives, metal ions, and organic linkers, these new carborane-based supramolecular coordination complexes (SCCs) may be broadly applicable to other challenging recognition and separation systems with good performance.

中文翻译：

用于高选择性捕获正戊烷的碳硼烷骨架金属环的合成

分子结构相似、沸点相近的烷烃的特异性识别和分离面临着重大的科学挑战和工业需求。在这里，基于矩形碳硼烷的金属环被设计为以一种易于操作且更节能的方式从正戊烷、异戊烷和环戊烷混合物中选择性地包封正戊烷。带有1,2-二（4-吡啶基）乙烯的金属环 1 可以从这些三组分混合物中选择性地分离正戊烷，纯度为 97%。选择性归因于捕获具有匹配大小、C–H···π 相互作用和潜在 B–H ^δ− ···H的首选客体^δ+ –C 相互作用。此外，正戊烷的去除产生了原始的无客体碳硼烷金属环，可以在不损失性能的情况下回收利用。考虑到取代的碳硼烷衍生物、金属离子和有机连接基的多样性，这些新的基于碳硼烷的超分子配位络合物 (SCC) 可能广泛应用于其他具有挑战性的识别和分离系统，并具有良好的性能。

更新日期：2022-11-28

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