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Three-dimensional metal cadmium coordination polymer and preparation method thereof

A coordination polymer and metal cadmium technology, applied in the field of complex preparation, can solve the problems of low gas adsorption rate and poor stability

Active Publication Date: 2021-07-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a three-dimensional metal cadmium coordination polymer and its preparation method, which solves the problems of low gas adsorption rate and poor stability of this type of material

Method used

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  • Three-dimensional metal cadmium coordination polymer and preparation method thereof
  • Three-dimensional metal cadmium coordination polymer and preparation method thereof
  • Three-dimensional metal cadmium coordination polymer and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0024] A preparation method of a three-dimensional metal cadmium coordination polymer, comprising the following steps:

[0025] 1) Add Cd-L-BPY and BPEB in a molar ratio of 1:1 to 4mL DMF solvent, stir and mix at a temperature of 100°C to obtain a mixed solution;

[0026] 2) Transfer the mixed solution to a hydrothermal reaction kettle for solvothermal reaction, and obtain Cd-L-BPEB at the end of the reaction, and react at 90° C. for 72 hours.

[0027] This embodiment can obtain [Cd (L) (BPEB)] that productive rate is 75% n Coordination polymer materials.

Embodiment 2

[0029] A preparation method of a three-dimensional metal cadmium coordination polymer, comprising the following steps:

[0030] 1) Add Cd-L-BPY and BPEB to the DMA solvent at a molar ratio of 1:2, stir and mix at a temperature of 100°C to obtain a mixed solution;

[0031] 2) The mixed solution described in step 1) was transferred to a hydrothermal reaction kettle for solvothermal reaction. After the reaction was completed, Cd-L-BPEB was obtained, and the reaction was carried out at 100° C. for 48 hours.

[0032] This embodiment can obtain [Cd(L)(BPEB)] that productive rate is 79% n Coordination polymer materials.

Embodiment 3

[0034] A preparation method of a three-dimensional metal cadmium coordination polymer, comprising the following steps:

[0035] 1) Add Cd-L-BPY and BPEB into the DMF solvent at a molar ratio of 3:2, stir and mix at a temperature of 100°C to obtain a mixed solution;

[0036] 2) The mixed solution described in step 1) was transferred to a hydrothermal reaction kettle for solvothermal reaction. After the reaction was completed, Cd-L-BPEB was obtained, and the reaction was carried out at 120° C. for 96 hours.

[0037] This embodiment can obtain [Cd (L) (BPEB)] that productive rate is 80% n Coordination polymer materials.

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Abstract

The invention belongs to the technical field of complex preparation, and discloses a three-dimensional metal cadmium coordination polymer, the chemical formula of the three-dimensional metal cadmium coordination polymer is [Cd (L) (BPEB)] n, L is 5-aminoisophthalic acid anion, and BPEB is 1, 4-bis [2-(4 '-pyridyl) vinyl] benzene. The invention also discloses a preparation method of the coordination polymer Cd-L-BPEB, which comprises the following steps: adding Cd-L-BPY into a solution containing BPEB, and replacing BPY in a parent with a BPEB ligand through a solvothermal method to obtain the novel coordination polymer Cd-L-BPEB with the same skeleton as the parent. Through a solvent-assisted linker exchange method, the maximum reduction of the size of a unit cell is realized on the basis of not changing a frame, and higher-multiple lattice shrinkage or expansion is realized. Selected ligands and transition metal ions form a layered columnar structure, metal ions cadmium and carboxyl form a binuclear metal cluster, and close-range face-to-face arrangement of BPY ligands in a high-dimensional MOFs structure is achieved through rigid auxiliary ligand connection.

Description

technical field [0001] The invention belongs to the technical field of complex preparation, and in particular relates to a three-dimensional metal cadmium coordination polymer and a preparation method thereof. Background technique [0002] Although in recent years, with the rapid development of MOFs materials, a large number of MOFs with variable structures and unique properties have been synthesized one by one, but the controllable synthesis and directional assembly of MOF materials with specific functions and structures is still an urgent problem in the field of crystal engineering. one of the problems. When the external conditions change, their own structure will also change, and it is difficult to synthesize specific MOFs under conventional reaction conditions. The original MOFs material gas has problems such as low adsorption rate and poor stability. Contents of the invention [0003] The purpose of the present invention is to provide a three-dimensional metal cadmi...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 曹丽慧唐于雯周家成王旭
Owner SHAANXI UNIV OF SCI & TECH
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