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Green preparation method and application of zinc-based metal-organic framework material with small molecule recognition performance

An organic framework and framework material technology, which is applied to 2/12 groups of organic compounds without C-metal bonds, analytical materials, zinc organic compounds, etc. Simple process and high yield

Active Publication Date: 2021-06-18
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of expensive instruments and cumbersome operation steps required for the detection and identification of n-hexane at present, and to provide a method for preparing a zinc-based metal-organic framework material that is easy to operate and can quickly identify small molecules

Method used

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  • Green preparation method and application of zinc-based metal-organic framework material with small molecule recognition performance
  • Green preparation method and application of zinc-based metal-organic framework material with small molecule recognition performance
  • Green preparation method and application of zinc-based metal-organic framework material with small molecule recognition performance

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1, the preparation of zinc-based metal-organic framework material

[0023] Add 25.5 mg of 5-nitro-1,2,3-benzenetricarboxylic acid, 30.82 mg of 4,4'-bipyridine, and 74.48 mg of zinc perchlorate hexahydrate to a 10 mL glass vial at room temperature and 12.59 mg of lithium hydroxide monohydrate and 3 ml of distilled water. After sealing, put it in an oven at 80°C to react for 48 hours, and then gradually lower the temperature to room temperature at a rate of 2°C per hour. Then wash with distilled water 3 to 4 times, and filter out colorless long crystals. The yield was 80% based on Zn.

Embodiment 2

[0024] Embodiment 2, the preparation of zinc-based metal-organic framework material

[0025] Add 38.25 mg of 5-nitro-1,2,3-benzenetricarboxylic acid, 46.22 mg of 4,4'-bipyridine, and 111.71 mg of zinc perchlorate hexahydrate to a 10 mL glass vial at room temperature and 16.78 mg of lithium hydroxide monohydrate and 3 ml of distilled water. After sealing, place it in an oven at 80°C to react for 72 hours, and then gradually lower the temperature to room temperature at a rate of 2°C per hour. Then wash with distilled water 3 to 4 times, and filter out colorless long crystals. The yield was 80% based on Zn.

Embodiment 3

[0026] Embodiment 3, the crystal structure test of zinc-based metal-organic framework material

[0027] The crystal structure was determined by a Supernova type X-ray single crystal diffractometer using Mo-K monochromated by a graphite monochromator α Rays is the incident radiation source, with Diffraction points were collected by scanning, and their coordinates and anisotropy parameters were corrected by the least square method. The position of hydrogen atoms was obtained by theoretical hydrogenation. All calculations were performed using SHELXL-97 and SHELXL-97 program packages. The results show that the molecular formula of the metal organic framework material is C 24 h 18 Cl 0.5 N 4 o 14.5 Zn 3 , belongs to the orthorhombic crystal system, the space group is Fddd, and the unit cell parameters are α=β=γ=90°. The single crystal structure diagram of the prepared metal organic framework material is shown in figure 1 , the material is a three-dimensional network ...

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Abstract

The invention discloses a green preparation method and application of a zinc-based metal-organic framework material with small molecule recognition performance, the zinc-based metal-organic framework material with a three-dimensional structure is obtained through a hydrothermal synthesis method, the molecular formula is C24H18Cl0.5N4O14.5Zn3, and the material has high hydrothermal stability and air stability. The synthetic route of the zinc-based metal-organic framework material comprises the following steps: adding zinc perchlorate hexahydrate, 5-nitro-1, 2, 3-benzene tricarboxylic acid and 4, 4 '-dipyridyl into an aqueous solution in proportion, adjusting the pH value by using lithium hydroxide monohydrate, reacting at 80 DEG C, and cooling to room temperature to obtain a target product. The target product can quickly and selectively recognize small molecular compounds such as n-hexane, n-heptane and isooctane. The material is simple in preparation method, green and environment-friendly, low in cost, high in yield and good in application effect, has good water and heat stability, and can realize selective recognition capability on small molecules.

Description

technical field [0001] The invention belongs to the technical field of fluorescent metal-organic framework materials, and relates to a green preparation method of a three-dimensional metal-organic framework material. The complex has good thermal stability and the performance of recognizing small organic molecules. Background technique [0002] Conventional inorganic and organic fluorescent materials have been extensively studied and found wide applications in lighting, displays, sensors, and optical devices. Inorganic-organic composites, metal-organic frameworks, which unify the inorganic and the organic, are a new type of multifunctional fluorescent materials. Fluorescent metal-organic framework materials have multiple advantages such as simple synthesis, mild reaction conditions, strong controllability of pores and sizes, and rich and diverse luminescent properties. The development trend of fluorescent materials. [0003] Alkanes such as n-hexane are colorless liquids wi...

Claims

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Application Information

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IPC IPC(8): C08G83/00C07F3/06C09K11/06G01N21/64
CPCC08G83/008C07F3/003C09K11/06G01N21/643C09K2211/188
Inventor 张晓平赵铭钦席高磊路晓崇陈芝飞冯颖杰赵旭马胜涛党炳俊
Owner HENAN AGRICULTURAL UNIVERSITY
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