A dinuclear cobalt complex [Co (OH)L ](ClO ) (1, L =N[(CH ) NHCH (m-C H )CH NH(CH ) ] N) displays high selectivity and efficiency for the photocatalytic reduction of CO to CO in CH CN/H O (v/v=4:1) under a 450 nm LED light irradiation, with a light intensity of 100 mW cm . The selectivity reaches as high as 98 %, and the turnover numbers (TON) and turnover frequencies (TOF) reach as high as 16896 and 0.47 s , respectively, with the calculated quantum yield of 0.04 %. Such high activity can be attributed to the synergistic catalysis effect between two Co ions within 1, which is strongly supported by the results of control experiments and DFT calculations.

An extremely stable hydrogen-bonded organic framework, HOF-8, was fabricated. HOF-8 is not only thermally stable but also stable in water and common organic solvents. More interestingly, desolvated HOF-8 exhibits high CO2 adsorption as well as highly selective CO2 and C6H6 adsorption at ambient temperature.

Revealing the contribution of - stacking interactions in supramolecular assembly is important for understanding the intrinsic nature of molecular assembly fundamentally. However, because they are much weaker than covalent bonds, - stacking interactions are usually ignored in the construction of porous materials. Obtaining stable porous materials that are only dependent on - stacking interactions, despite being very challenging, could address this concern. Here, we present a porous supramolecular framework (-1) stabilized only by intermolecular - stacking interactions. -1 shows good thermal and chemical stability not only in various organic solvents but also in aqueous solution in a broad pH range. Furthermore, featuring one-dimensional channels with dangling thiolate groups, -1 exhibits excellent Hg 2+ removal performance, with adsorption capacity as high as 786.67 mg g −1 and an adsorption ratio as high as 99.998%. In addition, -1 also shows high adsorption selectivity to Hg 2+ in the presence of a series of interfering ions.

This paper highlights the current key progress on HOF-based materials, including their design, structural characteristics, and applications.