Design of a Novel Naphtiridine‐based Covalent Triazine Framework for Carbon Dioxide Capture and Storage Applications

• Published in: ChemistrySelect (Weinheim) 2022-12, Vol.7 (47), p.n/a
• Main Authors: Tuci, Giulia, Pugliesi, Matteo, Rossin, Andrea, Pham‐Huu, Cuong, Berretti, Enrico, Giambastiani, Giuliano
• Format: Article
• Language: English
• Subjects: Carbon Capture and Storage; CO2 physisorption; Covalent Triazine Frameworks; Cyclotrimerization; Porous Organic Polymers
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202203560

Covalent triazine frameworks (CTFs) represent a sub‐class of Porous Organic Polymers showing high chemical/thermal stability, large permanent porosity and intrinsically high N‐content. All these features make them ideal candidates for Carbon Capture and Storage (CCS) applications. Herein, a novel CTF has been prepared under ionothermal conditions through cyclotrimerization of a newly designed dicyano‐building block with high N/C ratio (2,6‐Dicyano‐1,5‐naphthyridine, 4). The as prepared CTF‐Napht showed remarkable carbon dioxide uptake at ambient conditions, with a loading of 3.93 mmol/g (17.3 wt. %) at 1 bar and 298 K that outperforms many benchmark CTF systems from the literature. The ad‐hoc designed dicyano building unit together with a judicious choice of synthetic conditions have imparted to CTF‐Napht an outstanding affinity towards CO2 confirmed by its isosteric heat of adsorption (Qst) as high as 39.6 KJ/mol that ranks among the highest reported so far for CTF‐based polymers. The synthesis of a novel Covalent Triazine Framework based on 2,6‐Dicyano‐1,5‐naphthyridine building unit has been carried out. The as prepared CTF‐Napht demonstrated outstanding affinity towards CO2 with remarkable carbon dioxide uptake capacity at ambient conditions and a high isosteric heat of adsorption value.