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Melamine-based porous covalent organic polymer as well as preparation method and application thereof

A covalent organic and melamine technology, applied in chemical instruments and methods, instruments, analytical materials, etc., can solve the problems of difficult large-scale preparation, long synthesis time, high synthesis temperature, etc., achieve good detection effect and sensitivity, simple structure, and easy synthesis The effect of simple method

Pending Publication Date: 2020-06-26
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still widespread disadvantages such as long synthesis time, high synthesis temperature, and difficulty in mass production, which limit its wide use.

Method used

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  • Melamine-based porous covalent organic polymer as well as preparation method and application thereof
  • Melamine-based porous covalent organic polymer as well as preparation method and application thereof
  • Melamine-based porous covalent organic polymer as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The synthesis of embodiment 1 porous covalent organic polymer material melamine-COP

[0044] Accurately weigh 1.008g (0.008mol) of melamine and 1.261g (0.006mol) of 4,4'-biphenyldiformaldehyde into a 250ml two-necked flask in turn, add 80ml of dimethyl sulfoxide, fill with nitrogen protection, and store at 120°C Under the condition of reflux, react for 1 day. It was then cooled to room temperature and the solid was filtered off to obtain a porous covalent organic polymer material.

[0045] The obtained porous covalent organic polymer material was repeatedly washed with hot water at 60°C to remove unreacted melamine, and then washed with acetone and tetrahydrofuran for 24 hours after filtration to remove unreacted 4,4'-biphenyl Diformaldehyde. Then filter and dry to obtain melamine-COP.

Embodiment 2

[0047] The melamine-COP that embodiment 1 obtains carries out infrared spectroscopic analysis, and the obtained infrared spectrogram is as follows figure 1 Shown, the infrared absorption spectrum of monomer melamine (melamine, B) is at 3500cm -1The characteristic peak of amino group appears at 4,4'-biphenyldicarbaldehyde (4,4'-Biphenyldicarboxaldehyde, C) at 1670cm -1 The characteristic peak of carbonyl appears at the place, and melamine-COP (A) is in 1360cm -1 The characteristic peak of the amide bond appears at , but the characteristic peak of the two monomers does not appear, indicating that the two monomers participate in the reaction to form a new amide bond-linked COP material.

[0048] The melamine-COP that embodiment 1 obtains carries out carbon nuclear magnetic spectrum ( 13 C NMR) analysis, the obtained carbon nuclear magnetic spectrum is as figure 2 As shown, about 166ppm corresponds to the chemical shift of C on the -C=N bond on melamine, about 160ppm correspon...

Embodiment 3

[0050] Carry out the absorption and desorption test of nitrogen to the porous covalent organic polymer material that embodiment 1 obtains, Figure 4 is the pore size distribution diagram of the material, from Figure 4 It can be seen that the material has a uniform pore size, and the pore size distribution is about 1.13nm, which is a microporous material. Figure 5 is the isothermal adsorption-desorption curve of the material, and is the characteristic of the adsorption-desorption curve of a typical microporous material. This also coincides with the fact that the COP material has a uniform pore size.

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Abstract

The invention discloses a porous covalent organic polymer material (melamine-COP) based on melamine as a light-emitting core, a preparation method of the porous covalent organic polymer material and application of the porous covalent organic polymer material in Fe < 3 + > ion detection. According to the porous covalent organic polymer material melamine-COP, melamine and 4, 4 '-diaminodiphenyl ether are added into a DMSO solvent according to a molar ratio of 4:3to react for 24 hours in a nitrogen atmosphere at 120 DEG C; the reaction mixture is filtered to obtain a white solid, and the solid powder is repeatedly washed with tetrahydrofuran (THF) and hot water to obtain the target product melamine-COP. The melamine-COP has potential application value and good selectivity and sensitivity as asensor for detecting Fe < 3 + > in wastewater.

Description

technical field [0001] The invention belongs to the field of porous covalent organic polymer materials, and specifically relates to a porous covalent organic polymer material with melamine as a luminescent group, a preparation method and application thereof. Background technique [0002] Porous covalent organic polymer materials (COPs) are a new class of porous organic polymers, which can precisely arrange the target building units into ordered framework structures and nanopores at the atomic scale. COPs have attracted extensive attention due to their unique light weight, adjustable pore structure, high stability, and multifunctionality, and have broad application prospects. [0003] Fe 3+ As the most common metal, it is widely used in production and life. As the most common metal element in industrial production, its wide application also means that it will bring a lot of pollution. Fe 3+ With the discharge of industrial wastewater into the ecological environment, it will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C09K11/06G01N21/64
CPCC08G73/065C08G73/0644C09K11/06G01N21/643C09K2211/1466G01N21/6402G01N2021/6432
Inventor 汪芳明李木李广俊陈立庄
Owner JIANGSU UNIV OF SCI & TECH
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