Ni(II) metal-organic frameworks and their synthesis methods and applications

Abstract

The invention relates to a Ni (II)-based metal-organic framework and a synthesis method and application thereof and belongs to the field of catalyst preparation. The synthesis method comprises the following steps: firstly, synthesizing a metal-organic framework Ni-MOF-1 through an organic ligand L, and then heating Ni-MOF-1 crystals at 100 DEG C for 4-6 hours, so as to prepare Ni-MOF-2; and finally, immersing the Ni-MOF-2 into a gas-phase atmosphere of iodine for 24 hours, so as to obtain a novel iodine-loaded catalyst Ni-MOF-3. The benzaldehyde silicon cyanation can be effectively catalyzed by the catalyst without need of a solvent reaction; and therefore, the harm to the environment caused by a toxic solvent is reduced, the reaction temperature is mild, reaction time is short, the catalyst consumption is low, and no other additives are used; and compared with free iodine, the metal-organic framework can be reused for over five times.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a Ni(II) metal-organic framework and its synthesis method and application. Background technique [0002] The application of supramolecular assemblies is the most important research hotspot in current supramolecular chemistry. MOFs, as porous functional materials, show great advantages in gas adsorption and gas adsorption of small organic molecules. Elemental iodine is a purple-black scaly crystal with metallic luster, easily soluble in organic solvents and sublimated. Iodine is an important raw material for the manufacture of various inorganic and organic iodine compounds. It is also one of the indispensable elements of the human body, animals and plants. It has a large atomic radius and multi-layer electronic structure, so that it has certain special properties, such as the ability to catalyze organic chemical reactions, so it has been valued by the organic chemistry commun...

AI Technical Summary

Problems solved by technology

However, the use of MOFs to adsorb iodine to continue the catalytic reaction has not yet been discovered.

Especially for the silicocyanation reaction of benzaldehyde, the existing catalysts are generally organic solvents, which not only have strong toxicity and low catalytic efficiency, but also need to add other additives, the catalyst is not recyclable, the cost is too high, and the running time is too long.

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