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.

The solar-driven CO 2 reduction is achallenge in the field of "artificial photosynthesis", as most catalysts display low activity and selectivity for CO 2 reduction in watercontaining reaction systems as ar esult of competitive proton reduction. Herein, we report ad inuclear heterometallic complex, [CoZn(OH)L 1 ](ClO 4 ) 3 (CoZn), which shows extremely high photocatalytic activity and selectivity for CO 2 reduction in water/acetonitrile solution. It achieves aselectivity of 98 %for CO 2 -to-CO conversion, with TONa nd TOFv alues of 65000 and 1.8 s À1 ,r espectively,4 ,1 9, and 45-fold higher than the values of corresponding dinuclear homometallic [CoCo-(OH)L 1 ](ClO 4 ) 3 (CoCo), [ZnZn(OH)L 1 ](ClO 4 ) 3 (ZnZn), and mononuclear [CoL 2 (CH 3 CN)](ClO 4 ) 2 (Co), respectively, under the same conditions.T he increased photocatalytic performance of CoZn is due to the enhanced dinuclear metal synergistic catalysis (DMSC) effect between Zn II and Co II , which dramatically lowers the activation barriers of both transition states of CO 2 reduction.

No abstract

No abstract

It is common that different crystal facets in metal and metal oxide nanocrystals displayd ifferent catalytic performances,whereas such phenomena have been rarely documented in metal-organic frameworks (MOFs). Herein, we demonstrate for the first time that anickel metal-organic layer (MOL) exposing rich (100) crystal facets (Ni-MOL-100) shows amuch higher photocatalytic CO 2-to-CO activity than the one exposing rich (010) crystal facets (Ni-MOL-010) and its bulky counterpart (bulkyNi-MOF), with acatalytic activity up to 2.5 and 4.6 times more active than Ni-MOL-010 and bulkyN i-MOF,r espectively.T heoretical studies reveal that the two coordinatively unsaturated Ni II ions with ac lose distance of 3.50 on the surface of Ni-MOL-100 enables synergistic catalysis,l eading to more favorable energetics in CO 2 reduction than that of Ni-MOL-010.