Othman Hanibal, Oestreich Robert, Küll Vivian, Fetzer Marcus N A, Janiak Christoph
Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
Molecules. 2025 Jul 24;30(15):3110. doi: 10.3390/molecules30153110.
Covalent triazine frameworks (CTFs) have gained recognition as stable porous organic polymers, for example, for CO separation. From the monomer 4,4'-(phenazine-5,10-diyl)dibenzonitrile (pBN), new pBN-CTFs were synthesized using the ionothermal method with a variation in temperature (400 and 550 °C) and the ZnCl-to-monomer ratio (10 and 20). N adsorption yielded BET surface areas up to 1460 mg . The pBN-CTFs are promising CO adsorbents and are comparable to other benchmark CTFs such as CTF-1 with a CO uptake of pBN-CTF-10-550 at 293 K of up to 54 cm g or 96 mg g, with a CO/CH IAST selectivity of 22 for a 50% mixture of CO/CH. pBN-CTF-10-400 has a very high heat of adsorption of 79 kJ mol for CO near zero coverage in comparison to other CTFs, and it also stays well above the liquefaction heat of CO due to its high microporosity of 50% of the total pore volume.
共价三嗪框架（CTFs）已被公认为是稳定的多孔有机聚合物，例如用于CO分离。以单体4,4'-（吩嗪-5,10-二基）二苄腈（pBN）为原料，采用离子热法，通过改变温度（400和550℃）和ZnCl与单体的比例（10和20）合成了新型pBN-CTFs。N吸附得到的BET表面积高达1460 m²/g。pBN-CTFs是很有前景的CO吸附剂，与其他基准CTFs如CTF-1相当，pBN-CTF-10-550在293 K下对CO的吸附量高达54 cm³/g或96 mg/g，对于50%的CO/CH₄混合物，其CO/CH₄ IAST选择性为22。与其他CTFs相比，pBN-CTF-10-400在接近零覆盖度时对CO具有非常高的79 kJ/mol的吸附热，并且由于其50%的总孔体积具有高微孔率，其吸附热也远高于CO的液化热。
