A rigid phenyl-based covalently interlocked macrocycle with inherent porosity

IF 8.1 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Chemistry Frontiers Pub Date : 2026-02-17 DOI:10.1039/D6QM00038J

Biao Xia, Hartmut Komber, Sven M. Elbert, Michael Mastalerz and Junzhi Liu

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Abstract

The precise construction of three-dimensional (3D) carbon networks consisting solely of sp² hybridized atoms has long been pursued in carbon nanoscience. Herein, we report the bottom-up synthesis of a covalently interlocked macrocycle ([2]CIM) featuring a molecular core of 31 benzene units. X-ray crystallography unambiguously confirmed the covalently interlocked structure of [2]CIM, revealing a rigid 3D architecture with inherent porosity. Its conformational rigidity and solid-state packing enable it to be a promising molecular porous material, exhibiting a specific surface area (SA_BET) of 507 m² g⁻¹. Gas absorption studies demonstrated the preferential adsorption of ethane (C₂H₆) over ethene (C₂H₄) by the phenyl-based covalently interlocked macrocycle. [2]CIM exhibits a unique gas separation performance among discrete phenyl-based porous macrocycles.

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具有固有孔隙度的刚性苯基共价互锁大环

在碳纳米科学中，精确构建仅由sp2杂化原子组成的三维（3D）碳网络一直是人们追求的目标。在此，我们报道了自下而上合成共价互锁的大环（[2]CIM），其分子核心为31个苯单元。x射线晶体学明确证实了[2]CIM的共价联锁结构，揭示了具有固有孔隙的刚性3D结构。它的构象刚性和固态包装使其成为一种很有前途的分子多孔材料，其比表面积（SABET）为507 m2 g−1。气体吸附研究表明，苯基共价联锁大环对乙烷（C2H6）的吸附优于乙烯（C2H4）。[2]CIM在离散苯基多孔大环中表现出独特的气体分离性能。

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来源期刊

Materials Chemistry Frontiers Materials Science-Materials Chemistry

CiteScore

12.00

自引率

2.90%

发文量

313

期刊介绍： Materials Chemistry Frontiers focuses on the synthesis and chemistry of exciting new materials, and the development of improved fabrication techniques. Characterisation and fundamental studies that are of broad appeal are also welcome. This is the ideal home for studies of a significant nature that further the development of organic, inorganic, composite and nano-materials.