Cobalt coordination polymer constructed by histidine derived ligand and preparation method of cobalt coordination polymer

Abstract

The invention discloses a cobalt coordination polymer constructed by histidine derived ligand and a preparation method of the cobalt coordination polymer. The preparation method includes adding cobalt chloride and histidine derived ligand into distilled water, adding sodium hydroxide solution to regulate pH value to be 6.8-7.2 with stirring reaction for 25-35 minutes at the room temperature, continuing to react for 3-4 days at the temperature of 80-90 DEG C, cooling the solution until pink bulk crystals are separated out, picking the pink bulk crystals and then filtering and washing the same to obtain the cobalt coordination polymer constructed by histidine derived ligand. The raw material, namely L-histidine, is used as the chiral ligand, benzoic acid-4-formaldehyde is added and used as the second auxiliary ligand; thus, the novel chiral histidine derived ligand is synthetised on the premise of keeping the inherent chirality and the coordinating group, namely carboxyl. The histidine derived ligand keeps the inherent N-O chelate coordination mode of natural amino acids; besides, as the modified coordinating group benzoic acid is added, the space extension of a chiral unit will be promoted, which facilitates construction of three-dimensional coordination network materials.

Description

Technical field [0001] The invention relates to the field of molecular materials, in particular to a cobalt coordination polymer constructed by a histidine-derived ligand and a preparation method thereof. Background technique [0002] Organic-inorganic hybrid coordination materials are a new type of functional materials formed by the self-assembly of specific metal nodes or organic bridging ligands through coordination bonds. They are different from the existing organic-inorganic hybrid materials. Hybrid coordination materials have The characteristics of adjustable structure and diversified functions have attracted great attention from materials and chemists. However, there are relatively few studies on chiral organic-inorganic hybrid coordination materials and their applications in the field of asymmetric catalysis. Since the synthesis of such self-supported chiral organic-inorganic hybrid coordination catalysts has a certain degree of complexity and uncertainty, and there is n...

AI Technical Summary

Problems solved by technology

The reason may be that the coordination positions of carboxyl and amino groups in amino acids are close, and they tend to combine with various metal ions in the NO chelating coordination mode to form a more stable chelating ring space structure. type, which ultimately hinders the extension of the coordination structure to the high-dimensional space configuration

In addition, the existing reported chiral ligands are expensive to synthesize and are not suitable for popularization in industrial applications. The most critical thing is that the coordination materials assembled with such chiral ligands and metal ions have poor water stability. , it is difficult to preserve the expected empty metal sites

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