Official websites use. Share sensitive information only on official, secure websites. Electron microscopy confirms a homogeneous distribution of nano- to sub-micron-sized zirconium clusters in the COF. Using 0. Additionally, 2. The hydrolytic detoxification of the live agent Soman is also achieved. Catalyzes Knoevenagel condensation with high yields in waterβa green catalyst.
Covalent organic frameworks COFs , a subclass of porous organic materials, are crystalline materials made of multifunctional organic building units connected by robust covalent bonds, resulting in stable structures with high surface areas and tunable porosities.
Due to their elevated surface area-to-volume ratio, ultrafine metallic NPs are of special relevance for applications in heterogeneous catalysis. Metal oxyhydroxides are metastable intermediates between metal hydroxides and metal oxides. Although single crystal X-ray structure of La 0. Metal oxyhydroxides have surface hydroxyl groups and M- O -M linkages, similar to those in metal hydroxides and metal oxides, respectively, 27 thus exhibiting attractive features of both classes of materials.
Recent reports showed that zirconium oxyhydroxide, formed due to the hydrolysis of zirconium chloride, can actively degrade dimethyl nitrophenyl phosphate DMNP , 29 a mimetic of the nerve agent Soman. The composite catalyst is characterized, and its catalytic properties for Knoevenagel condensation, DMNP hydrolysis, and Soman degradation are evaluated.
Firstly, ZrOCl 2. To this dispersion, 0. Detailed syntheses of materials can be found in the experimental section of the manuscript. The characterization e. The optimized structure showed that each nanocluster was built from 8 zirconium centers, bridging and free hydroxyl as well as oxo centers, largely resembling the experimentally determined crystalline structure of ZrO OH 2.
