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Coordination polymers with selective ion exchange properties and their applications

A coordination polymer, anion technology, applied in the application of selective anion exchange performance, 4,5-bis-3--1,2,4-triazole-silver coordination polymer preparation field, can Solve problems such as the shortage of rhenium supply, achieve the effects of short reaction time, avoid side reactions, and easy post-processing

Inactive Publication Date: 2018-08-17
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the production of rhenium is relatively abundant in my country, due to the further expansion of the use of rhenium, the supply of rhenium is tight, and at this stage there are few reports on materials with ultra-high enrichment capacity for rhenium

Method used

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  • Coordination polymers with selective ion exchange properties and their applications
  • Coordination polymers with selective ion exchange properties and their applications
  • Coordination polymers with selective ion exchange properties and their applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation and Discussion of Polypyridine-Bridged Organic Ligand (L) Containing 1,2,4-Triazole

[0039] 1. Synthesis experiment and post-processing:

[0040] Dissolve N-(4-pyridyl)-2-pyridine-thioamide (21.5 g, 0.1 mol) and 4-pyridinecarbohydrazide (13.7 g, 0.1 mol) in 200 mL of n-butanol, and heat to reflux for 36 hours After that, the heating was stopped, cooled to room temperature, filtered under reduced pressure, and washed with ethanol three times to obtain a light yellow solid. Recrystallized with ethanol to obtain a white powder product. Accurately weighed with an analytical balance, the calculated yield was 46%.

[0041] 2. Results and discussion:

[0042] Analytical testing equipment:

[0043] Elemental analysis, C, H, N content determination using CE-440 (Leemanlabs) elemental analyzer

[0044] Infrared Spectroscopy, AVATAR-370 (Nicolet) Fourier Transform Infrared Spectrometer

[0045] Elemental Analysis: Theoretical Values ​​(C 17 h 12 N 6 , Mr = 300....

Embodiment 2

[0048] Preparation and Discussion of Polypyridine-Bridged Organic Ligand (L) Containing 1,2,4-Triazole

[0049] 1. Synthesis experiment and post-processing:

[0050] Dissolve N-(4-pyridyl)-2-pyridine-thioamide (21.5 g, 0.1 mol) and 4-pyridinecarbohydrazide (27.4 g, 0.2 mol) in 200 mL of n-butanol, and heat to reflux for 36 hours After that, the heating was stopped, cooled to room temperature, filtered under reduced pressure, and washed with ethanol three times to obtain a light yellow solid. Recrystallized with ethanol to obtain a white powder product. Accurately weighed with an analytical balance, the calculated yield was 44%.

[0051] 2. Results and discussion:

[0052] Analytical testing equipment:

[0053] Elemental analysis, C, H, N content determination using CE-440 (Leemanlabs) elemental analyzer

[0054] Infrared Spectroscopy, AVATAR-370 (Nicolet) Fourier Transform Infrared Spectrometer

[0055] Elemental Analysis: Theoretical Values ​​(C 17 h 12 N 6 , Mr = 30...

Embodiment 3

[0058] Preparation and Discussion of Polypyridine-Bridged Organic Ligand (L) Containing 1,2,4-Triazole

[0059] 1. Synthesis experiment and post-processing:

[0060] Dissolve N-(4-pyridyl)-2-pyridine-thioamide (21.5 g, 0.1 mol) and 4-pyridinecarbohydrazide (20.6 g, 0.15 mol) in 200 mL of n-butanol, and heat to reflux for 40 hours After that, the heating was stopped, cooled to room temperature, filtered under reduced pressure, and washed with ethanol three times to obtain a light yellow solid. Recrystallized with ethanol to obtain a white powder product. Accurately weighed with an analytical balance, the calculated yield was 42%.

[0061] 2. Results and discussion:

[0062] Analytical testing equipment:

[0063] Elemental analysis, C, H, N content determination using CE-440 (Leemanlabs) elemental analyzer

[0064] Infrared Spectroscopy, AVATAR-370 (Nicolet) Fourier Transform Infrared Spectrometer

[0065] Elemental Analysis: Theoretical Values ​​(C 17 h 12 N 6 , Mr = 3...

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Abstract

The invention relates to a coordination polymer with selective ion exchange performance and application thereof. The chemical formula of the coordination polymer is [Ag(L)(NO3)](CH3OH)(H2O)2, wherein L refers to 4,5-bis(4-pyridyl)-3-(2-pyridyl)-1,2,4-triazole. Under the normal-temperature normal-pressure dark condition, AgNO3 is prepared into a water solution to be dropwise added to the bottom of a test tube, and after a buffer layer is added, the ligand L dissolved in methyl alcohol is slowly added dropwise to the upper side of the test tube; standing and volatilizing are carried out, and colorless blocky crystals grow out in the test tube after about 3-4 days. An experiment proves that nitrate ions in a cavity of the material can be selectively subjected to anion exchange with perrhenate ions, and high capacity is shown to enriching and absorbing of metal rhenium. According to the material, the limitation of an existing anion exchange material is overcome, the advantages that the exchange process is simple and feasible, and the exchange speed is high are achieved, and therefore the coordination polymer is expected to be actually applied to the field of ion exchange materials.

Description

technical field [0001] The invention belongs to the technical field of synthesis, structure and performance of novel inorganic-organic hybrid materials, and in particular relates to a 4,5-bis(4-pyridyl)-3-(2-pyridyl) with a three-dimensional open skeleton structure - Preparation of 1,2,4-triazole-silver coordination polymer and its application in selective anion exchange properties. Background technique [0002] Coordination polymers are formed by the self-assembly of inorganic metal ions and organic ligands. They have both the properties of organic and inorganic compounds, and coordination polymers are easy to synthesize, large in specific surface area, rich in topology, and flexible in structure. Therefore, it has great application potential in optical materials, electrical materials, superconducting materials, catalytic materials, and ion exchange materials. As more and more scientific workers invest in the research of the functional structure of coordination compounds, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J45/00C30B29/58
CPCB01J45/00C08G83/008C30B29/58
Inventor 李程鹏王思杜淼
Owner TIANJIN NORMAL UNIVERSITY
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