Preparation method and application of tetra-amido macrocyclic ligand and metal chelate thereof

Abstract

The invention relates to a preparation method and application of a tetra-amido macrocyclic ligand and a metal chelate thereof. The preparation method comprises the following steps: (1) mixing a compound shown as formula (I) with organic alkali to obtain a mixed solution A; mixing the compound shown as formula (II) with a carboxyl activating agent to obtain a mixed solution B; and (2) mixing the mixed solution A with the mixed solution B obtained in the step (1), and then mixing the mixing product with a strong acid solution to obtain the tetra-amido macrocyclic ligand shown as formula (III). Compared with a synthesis method in the prior art, the synthesis method provided by the invention is greener, lower in toxicity, simpler in synthesis route, easy to control synthesis conditions, higherin synthesis efficiency and lower in cost, and can easily achieve industrial production and improve economic benefits. The tetra-amido macrocyclic ligand can be further chelated with a transition metal to obtain an oxidation catalyst, which can be used for treating industrial wastewater of papermaking, printing and dyeing, pharmacy, organic chemical engineering and the like and remediating polluted soil.

Description

technical field [0001] The invention belongs to the technical field of synthesis of environmental functional materials, and in particular relates to a preparation method and application of a tetraamide macrocyclic ligand and a metal chelate thereof. Background technique [0002] At present, the catalytic technology based on the oxidation of hydrogen peroxide has received extensive attention in the field of environment and catalysis, but the biggest shortcoming of this natural oxidant in practical applications is its low activity and low selectivity when reacting with substrates, so it is necessary to develop A catalyst that can improve the oxidation activity of oxidants such as hydrogen peroxide, thereby reducing the harm to the environment. Due to its unique physical and chemical properties, the transition metal tetraamide-based macrocyclic ligand catalytic oxidant has strong catalytic performance, and the degraded product is environmentally friendly, and can be used as an ...

AI Technical Summary

Problems solved by technology

The acid resistance and reaction stability of the synthesized composite material are significantly enhanced, and the reactivity is improved, which solves the problem that the activity of the tetraamidohexamethylphenylcycloiron in the prior art has a strong dependence on pH. It is significantly reduced under acidic and neutral conditions, especially under acidic conditions, it is prone to demetallization and irreversible deactivation

This invention promotes the low-cost application of tetraamidohexamethylphenyl ring iron in the actual treatment of wastewater with a wide range of pH, and improves its acid resistance, but its synthesis process is relatively complicated, the efficiency is low, and the synthetic raw materials are environmentally harmful. bigger

[0007] Although the prior art provides some synthetic methods and application methods about tetraamido-macrocyclic ligand oxidation catalysts, and methods for improving the stability and activity of tetraamido-hexamethylphenyl ring iron, there are still synthetic methods Problems such as complex steps, low product efficiency, long synthesis cycle, toxic raw materials, and great harm to the environment and human body

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