Eutectic Molten Salt Synthesis of Highly Microporous Macrocyclic Porous Organic Polymers for CO 2 Capture
Eutectic Molten Salt Synthesis of Highly Microporous Macrocyclic Porous Organic Polymers for CO 2 Capture
复制标题
共晶熔盐合成高微孔大环多孔有机聚合物用于CO 2 捕集
DOI：
10.1002/hlca.202300072
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发表时间：
2023
影响因子：
1.8
通讯作者：
Coskun, Ali
中科院分区：
文献类型：
--
作者：
Ashirov, Timur;Puangsamlee, Thamon;Robles, Alexandra;Fritz, Patrick W.;Piech, Krzysztof;Miljanić, Ognjen Š.;Coskun, Ali
多孔材料的发展对于捕获来自各种排放源的CO2具有极大的兴趣，这对于减轻其有害的环境影响至关重要。在这方面，多孔有机聚合物（POP）由于其结构可调性，物理化学稳定性和高表面积而成为主要候选者。为了将环四苯偶姻衍生的大环的固有性质-其高CO2亲和力-转移到多孔网络中，本文中我们报告了通过八酮大环与吩嗪-2，3，7，8-四胺盐酸盐的缩聚来合成基于三维（3D）大环的POP。该缩聚在离子交换条件下使用低共熔盐混合物在200至300 °C的温度范围内进行。所得到的聚合物，命名为3D-mmPOP，显示出反应温度依赖的表面积和气体吸收特性。在250 °C下合成的3D-mmPOP-250表现出752 m2 g − 1的表面积和源自大环单元的高微孔性，从而在273 K，1.1 bar下产生40.6kJ mol− 1的优异CO2结合焓和3.51 mmol g− 1的CO2吸收能力。
The development of porous materials is of great interest for the capture of CO2from various emission sources, which is essential to mitigate its detrimental environmental impact. In this direction, porous organic polymers (POPs) have emerged as prime candidates owing to their structural tunability, physiochemical stability and high surface areas. In an effort to transfer an intrinsic property of a cyclotetrabenzoin‐derived macrocycle – its high CO2affinity – into porous networks, herein we report the synthesis of three‐dimensional (3D) macrocycle‐based POPs through the polycondensation of an octaketone macrocycle with phenazine‐2,3,7,8‐tetraamine hydrochloride. This polycondensation was performed under ionothermal conditions, using a eutectic salt mixture in the temperature range of 200 to 300 °C. The resulting polymers, named 3D‐mmPOPs, showed reaction temperature‐dependent surface areas and gas uptake properties. 3D‐mmPOP‐250 synthesized at 250 °C exhibited a surface area of 752 m2g−1and high microporosity originating from the macrocyclic units, thus resulting in an excellent CO2binding enthalpy of 40.6 kJ mol−1and CO2uptake capacity of 3.51 mmol g−1at 273 K, 1.1 bar.