A kind of solid-state phase transfer catalyst, preparation method and application based on cd-mof

Abstract

The invention discloses a novel solid-state three-phase catalyst. The novel solid-state three-phase catalyst comprises organic ligands L for synthesizing metal organic frameworks based on Cd(II), metal organic frameworks Cd-MOF-1 based on Co(II) and metal organic frameworks Cd-MOF-1' based on Co(II). A method for preparing the novel solid-state three-phase catalyst includes synthesizing the metal organic frameworks Cd-MOF-1 by the aid of the organic ligands L; arranging the metal organic frameworks CD-MOF-1 and 1-dodecyl bromide in a double-opening flask with the volume of 25 ml, adding 10 ml of anhydrous acetonitrile into the double-opening flask and heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile until the temperatures of the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile reach 80-90 DEG C; carrying out stirring reaction on the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile for 48 h; stopping heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile; arranging reaction systems in room-temperature environments; centrifugally separating the reaction systems; collecting precipitates; washing the precipitates by the aid of acetonitrile twice; washing the precipitates by the aid of methanol twice; washing the precipitates by the aid of diethyl ether twice to obtain the novel solid-state three-phase catalyst Cd-MOF-1'. The anhydrous acetonitrile is used as a solvent. The novel solid-state three-phase catalyst has the advantages that azidation reaction on 1-bromobutane can be effectively catalyzed by the novel solid-state three-phase catalyst without reaction of the traditional phase transfer catalysts, the reaction temperature is mild, and the novel solid-state three-phase catalyst is short in reaction time, low in usage and free of other additives, is easy to recycle as compared with the traditional phase transfer catalysts and can be reused by more than three times.

Description

technical field [0001] The invention relates to a metal-organic framework based on Cd(II) and its preparation, post-modification method and application, and belongs to the technical field of catalyst preparation. Background technique [0002] Metal-organic Framework (MOF) is a research hotspot in recent years. Compared with traditional porous materials, MOFs are a new type of porous organic-inorganic hybrid solid materials with a wide range of applications. MOFs have special Pores with topological structure, internal regular arrangement, and fixed size and shape. The design, synthesis and performance expression of coordination-driven supramolecular systems have become the main theme of research on organic-inorganic coordination compounds. With the progress of research, the design synthesis and post-modification and catalytic properties of MOFs have attracted more and more attention. [0003] Heterogeneous organic reactions are often encountered in organic synthesis, and th...

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Problems solved by technology

At present, phase transfer catalysts have been widely used in most fields of organic reactions, such as carbene reaction, substitution reaction, oxidation reaction, reduction reaction, diazotization reaction, displacement reaction, alkylation reaction, acylation reaction, polymerization reaction, and even Polymer modification, etc.; however, the above method has problems such as difficult catalyst recovery, high cost, and complicated operation

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