Asynchronous Double Schiff Base Formation of Pyrazole Porous Polymers for Selective Pd Recovery.

ABSTRACT: Pyrazole-linked covalent organic polymer is synthesized using an asynchronous double Schiff base from readily available monomers. The one-pot reaction features no metals as a building block or reagent, hence facilitating the structural purity and industrial scalability of the design. Through a single-crystal study on a model compound, the double Schiff base formation is found to follow syn addition, a kinetically favored product, suggesting that reactivity of the amine and carbonyls dictate the order and geometry of the framework building. The highly porous pyrazole polymer COP-214 is chemically resistant in reactive conditions for over two weeks and thermally stable up to 425 °C in air. COP-214 shows well-pronounced gas capture and selectivities, and a high CO₂/N_2</

SUBMITTER: Garai M 

PROVIDER: S-EPMC8061357 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature