Preparation method of zeolite imidazole framework structure material

A zeolite imidazole and frame structure technology is applied in the field of preparation of zeolite imidazole frame structure materials, which can solve the problems of application difficulties in integration of diagnosis and treatment, inability to effectively utilize the large specific surface area of ​​the zeolite imidazole frame structure, etc., and achieves high-efficiency contrast effect and low toxicity. , the effect of simple steps

Active Publication Date: 2019-07-12
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this loading makes the particle size and properties of the final compound largely constrained by the loaded particle itself, and the advantages of the large specific surface area of ​​the zeolite imidazole framework structure cannot be effectively utilized, which creates difficulties for the application of its integrated diagnosis and treatment.

Method used

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  • Preparation method of zeolite imidazole framework structure material
  • Preparation method of zeolite imidazole framework structure material
  • Preparation method of zeolite imidazole framework structure material

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Experimental program
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Effect test

Embodiment 1

[0065] The synthesis of embodiment 1 compound C1 (Mn / Zn)-ZIF-8

[0066] Compound C1 was synthesized according to the following steps

[0067] Mix zinc nitrate hexahydrate, 2-methylimidazole, and methanol at a mass ratio of 1:2.5:100, stir at room temperature for 16 hours, centrifuge to remove the supernatant, and dry to obtain a white powder—ZIF-8. According to the molar ratio of 1:3, ZIF-8 and manganese acetate tetrahydrate were weighed in turn, mixed evenly and added to 10ml of methanol, ultrasonically dispersed evenly, added to the polytetrafluoroethylene lining, placed in a stainless steel reaction kettle, 50 °C after heating for 24 hours. Take out and centrifuge to take out the supernatant, and dry to obtain a brown powder. The molar ratio of manganese to zinc in the product was found to be 0.114:1 by using an X-ray fluorescence spectrometer (Thermo).

Embodiment 2

[0068] The synthesis of embodiment 2 compound C2(Mn / Zn)-ZIF-90

[0069] Compound C2 was synthesized according to the following steps

[0070] Mix zinc nitrate hexahydrate, 2-formaldehyde imidazole, and methanol at a mass ratio of 1:2.5:100, stir at room temperature for 24 hours, centrifuge to remove the supernatant, and dry to obtain a white powder—ZIF-90. Weigh ZIF-90 and manganese acetate tetrahydrate sequentially according to the molar ratio of 1:6, mix them and add them to 10ml of methanol, ultrasonically disperse them evenly, add them to the polytetrafluoroethylene lining, place them in a stainless steel reaction kettle, 55 °C after heating for 24 hours. Take out and centrifuge to take out the supernatant, disperse the crude product in methanol solution, replace the alcohol solution every 24 hours, centrifuge after 72 hours, and dry in a vacuum oven to obtain a gray-black powder. The molar ratio of manganese to zinc in the product was found to be 0.127:1 by using an X-r...

Embodiment 3

[0071] The synthesis of embodiment 3 compound C3(Mn / Zn)-ZIF-91

[0072] Compound C3 was synthesized according to the following steps

[0073] Mix zinc nitrate hexahydrate, 2-formaldehyde imidazole, and methanol at a mass ratio of 1:2.5:100, stir at room temperature for 16 hours, centrifuge to remove the supernatant, and dry to obtain a white powder—ZIF-90. According to the molar ratio of 1:10, ZIF-90 and sodium borohydride were weighed once, dissolved in 20ml of methanol, reacted at 60°C for 24 hours, centrifuged to take out the supernatant and dried to obtain white powder-ZIF-91. Weigh ZIF-91 and manganese acetate tetrahydrate sequentially according to the molar ratio of 1:5, mix them and add them to 10ml methanol, ultrasonically disperse them evenly, add them to the polytetrafluoroethylene lining, place them in a stainless steel reaction kettle, 55 °C after heating for 24 hours. Take out and centrifuge to take out the supernatant, disperse the crude product in methanol sol...

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Abstract

The invention discloses a preparation method of a zeolite imidazole framework structure material. According to the method, a zeolite imidazole framework structure is subjected to ion exchange to become a composite of two metal ions, wherein post-exchanged particles have a nuclear magnetic resonance effect. The method is mild in reaction condition, easy to operate and low in raw material cost and comprises simple steps. The zeolite imidazole framework structure contrast medium prepared with the method has good water solubility, improved application safety, small toxicity to normal cells and efficient contrast effects.

Description

technical field [0001] The application relates to a preparation method of a zeolite imidazole frame structure material, which belongs to the field of preparation of zeolite imidazole frame structure materials. Background technique [0002] The metal-organic framework structure is a material formed in 1990 by a metal and an organic substance through a weak coordination bond, which is also called a "metal sponge". Its various structures provide metal-organic frameworks with different morphologies, compositions, sizes, and chemical properties, and also endow them with multifunctionality and stimuli-responsive drug-controlled release. Organometallic frameworks can still maintain controllable size, shape, and high uniformity while these modifications are performed. In addition, its large specific surface area and high porosity also contribute to the loading capacity of this material. In addition, the weakly coordinated bonds that form the metal-organic framework structure also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 吴爱国蒋振奇李娟王胤杰袁博项灵超李彦莹
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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