Zhang Guoshi, Xu Ning, Yang Miao, Wang Wenjing, Su Kongzhao, Yuan Daqiang
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, China.
College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China.
Angew Chem Int Ed Engl. 2025 Mar 24;64(13):e202423226. doi: 10.1002/anie.202423226. Epub 2025 Jan 16.
Here, we report the facile synthesis of imidazole-linked porous organic cages (IPOCs) via an in situ cyclization reaction protocol. Specifically, three IPOCs with [2+4] lantern-like structures and one with a [3+6] triangular prism structure were successfully prepared through condensation reactions between tetraformyl-functionalized calix[4]arene and bis(o-phenylenediamine) monomers in a single pot. Notably, these IPOCs exhibit high porosity, with Brunauer-Emmett-Teller (BET) specific surface areas reaching up to 1162 m g. Moreover, they demonstrate excellent chemical stability in both strong acidic and alkaline solutions. Furthermore, IPOC-2 and IPOC-4 display a remarkable NH capturing capability, with uptakes of up to 11.5 mmol g at 1 bar and 298 K, surpassing most reported porous organic materials. Additionally, IPOC-1 exhibits highly efficient fluorescent quenching sensing of aqueous NH, with a detection limit as low as 3.35×10 M. These findings strongly suggest the potential for widespread use of imidazole linkages in the development of robust functional porous organic cage materials for diverse applications.
在此，我们报道了通过原位环化反应方案简便合成咪唑连接的多孔有机笼（IPOCs）。具体而言，通过四甲酰基官能化的杯[4]芳烃与双（邻苯二胺）单体在单锅中的缩合反应，成功制备了三种具有[2+4]灯笼状结构的IPOCs和一种具有[3+6]三角棱柱结构的IPOC。值得注意的是，这些IPOCs具有高孔隙率，布鲁诺尔-埃米特-泰勒（BET）比表面积高达1162 m²/g。此外，它们在强酸性和碱性溶液中均表现出优异的化学稳定性。此外，IPOC-2和IPOC-4表现出显著的NH₃捕获能力，在1 bar和298 K下的吸附量高达11.5 mmol/g，超过了大多数报道的多孔有机材料。此外，IPOC-1对水溶液中的NH₃表现出高效的荧光猝灭传感，检测限低至3.35×10⁻⁶ M。这些发现有力地表明了咪唑连接在开发用于多种应用的坚固功能性多孔有机笼材料方面具有广泛应用的潜力。
