Covalent organic frameworks (COFs) usually crystallize as insoluble powders, and their processing for suitable devices is thought to be limited. We demonstrate that COFs can be mechanically pressed into shaped objects having anisotropic ordering with preferred orientation between hk0 and 00l crystallographic planes. Five COFs with different functionality and symmetry exhibited similar crystallographic behavior and remarkable stability, indicating the generality of this processing. Pellets prepared from bulk COF powders impregnated with LiClO4 displayed room temperature conductivity up to 0.26 mS cm(-1) and high electrochemical stability. This outcome portends use of COFs as solid-state electrolytes in batteries.

N-alkyl substitution–from methyl to heptyl–in isoreticular MIL-125-NH2 MOFs induces a stepwise decrease in the optical bandgap, while increasing CO2 photoreduction efficiencies.

the passive capture of clean water from humid air without reliance on bulky equipment and high energy has been a substantial challenge and has attracted significant interest as a potential environmentally friendly alternative to traditional water harvesting methods. Metal-organic frameworks (MOFs) offer a high potential for this application due to their structural versatility which permits scalable, facile modulations of structural and functional elements. Although Mofs are promising materials for water harvesting, little research has been done to address the microstructure-adsorbing characteristics relationship with respect to the dynamic adsorption-desorption process. in this article, we present a parametric study of nine hydrolytically stable Mofs with diverse structures for unraveling fundamental material properties that govern the kinetics of water sequestration in this class of materials as well as investigating overall uptake capacity gravimetrically. The effects of temperature, relative humidity, and powder bed thickness on the adsorption-desorption process are explored for achieving optimal operational parameters. We found that Zr-MOF-808 can produce up to 8.66 L H2O kg −1 Mof day −1 , an extraordinary finding that outperforms any previously reported values for MOF-based systems. The presented findings help to deepen our understanding and guide the discovery of next-generation water harvesting materials.Despite the rapid growth of modern infrastructure, access to clean water remains a critical issue and challenge to humanity that is projected to increase at a rate faster than that of energy production 1 . Limited access to freshwater due to the absence of sources, such as lakes, rivers, and groundwater is becoming even more problematic, with many of these sources becoming contaminated from human activities. Traditional means to acquire clean water, such as reverse osmosis and distillation, is costly and energy-intensive which in turn restricts real-world uses 2,3 . Therefore, it is essential to find portable solutions that are simple and low cost to produce clean water on demand in various environments.A substantial effort on accessing nontraditional water reserves, such as atmospheric water vapor, focuses on the ability to supply freshwater on-demand virtually anywhere on the earth 4 . Atmospheric water harvesting offers an attractive alternative by providing access to the omnipresent water vapor in the earth's atmosphere off the grid and in virtually any environment. Direct water harvesting from air has been demonstrated through cooling water vapor below its saturation pressure is not practical in dry climates due to its high energy demands 3 .Metal-organic frameworks (MOFs) due to their unique micro-structure, intrinsic porosity, and unprecedented functional and chemical control have a high potential to be used for harvesting water from air 5,6 . Recently, the use of MOFs to leverage the earth's natural thermal swing process to efficiently sequester clean water with little to no additional energy inpu...

We report UV-cured eutectic gel polymer electrolytes that improve cell performance, non-flammability, and water tolerance compared to the liquid solvent.