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Synthesis and application of porous covalent organic framework material with imine structure

A covalent organic framework, imine technology, applied in analytical materials, luminescent materials, material excitation analysis, etc., can solve the problems of poor thermal stability of COF materials, and achieve good chemical stability, low synthesis cost, and high yield. Effect

Inactive Publication Date: 2018-12-21
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

From the analysis of reaction types, the synthesis of COFs basically chooses some relatively common reversible reactions. A large number of known frameworks are constructed by dehydration condensation of boric acid, but the COF materials obtained by this reaction have poor thermal stability.

Method used

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  • Synthesis and application of porous covalent organic framework material with imine structure
  • Synthesis and application of porous covalent organic framework material with imine structure
  • Synthesis and application of porous covalent organic framework material with imine structure

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Embodiment Construction

[0034] The synthesis of TSC-Py COF of the present invention and the application of fluorescence detection of mercury ions will be described in detail below through specific examples.

[0035] 1. Synthesis of TSC-Py COF

[0036] Thiosemicarbazide (20 mg, 109 µmol)), 1,3,6,8-tetrakis(formylphenyl)pyrene (67 mg, 107 µmol) were dissolved in o-dichlorobenzene (1 mL) and N,N-dimethyl In acetamide (3mL), after ultrasonic dispersion was uniform, acetic acid solution (3M, 1mL) was slowly added dropwise to it, mixed evenly by hand; then reacted at 120°C for 72 hours; after the reaction, suction filtered, washed with DMAC first, and then Wash with THF and methanol to obtain a yellow powder; then place the yellow powder in a vacuum oven at 100°C for 12 hours, take it out, cool it to room temperature naturally, and grind it to obtain a yellow TSC-Py COF material.

[0037] 2. TSC-Py COF fluorescence detection of mercury ions

[0038] Take a certain amount of COF material and disperse it i...

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Abstract

The invention provides a synthesis method for a covalent organic framework material with an imine structure. The method comprises the following steps: using thiosemicarbazide and 1,3,6,8-tetrabenzoylpyrene as raw materials, using o-dichlorobenzene and N,N-dimethylacetamide as solvents, and using acetic acid as a catalyst, synthesizing to obtain TSC-Py COF through a solvothermal method. In DMF solution of the TSC-Py COF material, metal ion solutions of Ag<+>, Co<2+>, Fe<3+>, Cr<3+>, Pb<2+>, Zn<2+>, Na<+>, Mg<2+>, Mn<2+>, Ca<2+>, La<3+>, Ni<2+>, Al<3+>, Cu<2+>, Ce<3+>, Ba<2+>, K<+>, Cd<2+>, Pr<3+>, Fe<2+>, and Hg<2+> are respectively added. Only if mercury ions are added, the TSC-Py COF solution has the good fluorescence enhancement effect, so the covalent organic framework material can beused for fluorescence-detecting the metallic mercury ions.

Description

technical field [0001] The invention relates to the synthesis of a covalent organic framework material, in particular to a synthesis method of a porous covalent organic framework material with an imine structure, which can be used for fluorescence detection of mercury ions, belongs to the technical field of covalent organic synthesis and can detect metal ions field. Background technique [0002] Covalent organic frameworks (COFs) are a class of graphene-like polymers with specific crystal forms that have developed rapidly in the past decade. COFs are connected by covalent bonds, and the layers are connected by Π-Π stacking. Covalent organic framework materials have 2D and 3D pore structures, which have large specific surface area, low density, high crystallinity, and high chemical stability, so they are used in catalysis, gas storage and separation, Supercapacitors, the construction of superhydrophobic interfaces, and optoelectronic fields, etc. In 2005, Yaghi and others f...

Claims

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Application Information

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IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/1416G01N21/64G01N21/643G01N2021/6417
Inventor 杨武鲁琰农郭昊
Owner NORTHWEST NORMAL UNIVERSITY
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