A Cryogenically Flexible Covalent Organic Framework for Efficient Hydrogen Isotope Separation by Quantum Sieving

Abstract

Pyrdine incorporation into the covalent organic framework COF-1 resulted in a highly dense packing structure in which the pyridine occupies the hexagonal pore space between the COF layers. This optimizes pore aperture for quantum sieving of hydrogen isotopes and introduces flexibility at cryogenic temperatures into the system. The separation factor (S D 2 /H 2 ) is about 10 at 22 K, which is the highest reported to date. Chem. Asian J.

An efficient electrocatalyst for oxygen reduction reaction derived from a Co-porphyrin-based covalent organic framework

“…More importantly, the designability and versatility of building blocks that can be used for constructing periodic, porous functional two-dimensional (2D) and three-dimensional (3D) frameworks endow COFs with preponderant properties including distinguished light-emission, photoconduction, semiconductivity and chirality [19,20]. These unique properties have made COFs very promising in various applications such as gas storage [21,22] and separation [23], optoelectronics and photovoltaics [24][25][26][27][28][29], and catalysis [30][31][32].…”

Defective 2D Covalent Organic Frameworks for Postfunctionalization

“…Covalent organic frameworks (COFs), which are constructed by light elements (B, O, N, and C) and connected by covalent bonds, are a class of crystalline polymers and have developed rapidly in the last decade. Their tunable structures and pore sizes, high surface area values, and good thermal/chemical stabilities make them good candidates in various applications . Since the first COF was reported by Yaghi's group in 2005, numerous 2D or 3D COFs have been achieved by utilizing different kinds of building blocks via dynamic covalent chemistry principle.…”

Low Band Gap Benzimidazole COF Supported Ni3N as Highly Active OER Catalyst

“…DOI: 10.1002/aenm.201601189 covalent oragnic frameworks (COFs) find use in gas storage, [2] hydrogen evolution, [3] proton conduction, [4] quantum sieving, [5] photoconductivity, [6,7] catalysis, [8,9] and sensing. [10] Many Schiff bond linked COFs, despite their diverse functionalization, form as wafer-thin hexagonal sheets resembling graphene.…”