Premium
Synthesis of Porous Covalent Quinazoline Networks (CQNs) and Their Gas Sorption Properties
Author(s) -
Buyukcakir Onur,
Yuksel Recep,
Jiang Yi,
Lee Sun Hwa,
Seong Won Kyung,
Chen Xiong,
Ruoff Rodney S.
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201813075
Subject(s) - sorption , porosity , catalysis , adsorption , chemical engineering , solvent , chemistry , covalent bond , flue gas , chloride , condensation , polymer , zinc , inorganic chemistry , materials science , organic chemistry , physics , engineering , thermodynamics
The development of different classes of porous polymers by linking organic molecules using new chemistries still remains a great challenge. Herein, we introduce for the first time the synthesis of covalent quinazoline networks (CQNs) using an ionothermal synthesis protocol. Zinc chloride (ZnCl 2 ) was used as the solvent and catalyst for the condensation of aromatic ortho ‐aminonitriles to produce tricycloquinazoline linkages. The resulting CQNs show a high porosity with a surface area up to 1870 m 2 g −1 . Varying the temperature and the amount of catalyst enables us to control the surface area as well as the pore size distribution of the CQNs. Furthermore, their high nitrogen content and significant microporosity make them a promising CO 2 adsorbent with a CO 2 uptake capacity of 7.16 mmol g −1 (31.5 wt %) at 273 K and 1 bar. Because of their exceptional CO 2 sorption properties, they are promising candidates as an adsorbent for the selective capture of CO 2 from flue gas.