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Aqueous phase metal organic framework molecular imprinting material of enriched trace meta-tolyl-N-methylcarbamate (MTMC)

A metal-organic framework and molecular imprinting technology, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of slow mass transfer rate, damage of binding sites, particle size, irregular shape, etc., and achieve low production cost, Uniform particle distribution and good selective recognition effect

Active Publication Date: 2014-09-03
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The acquisition of molecularly imprinted materials synthesized by traditional bulk polymerization methods requires grinding and other steps. The size and shape of the ground particles are not regular enough, the mass transfer rate is slow, and the binding sites may be destroyed.

Method used

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  • Aqueous phase metal organic framework molecular imprinting material of enriched trace meta-tolyl-N-methylcarbamate (MTMC)
  • Aqueous phase metal organic framework molecular imprinting material of enriched trace meta-tolyl-N-methylcarbamate (MTMC)
  • Aqueous phase metal organic framework molecular imprinting material of enriched trace meta-tolyl-N-methylcarbamate (MTMC)

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Embodiment 1

[0031] A method for preparing a water-phase metal-organic framework molecularly imprinted material (MILMIP) enriched with trace amounts of tamethicarb, comprising the steps of:

[0032] 1). Preparation of MIL-101: 4.00g chromium nitrate (Cr(NO 3 ) 3 9H 2 O), 1.64g terephthalic acid (H 2BDC) and 125 μL of 40% hydrofluoric acid (HF) were added to 70 mL of ultrapure water, and ultrasonically mixed thoroughly. Transfer to a 100mL autoclave, heat at 220°C for 8h, cool to room temperature, transfer the reaction solution to a 100mL centrifuge tube, centrifuge, pour off the supernatant, wash the filter residue with ultrapure water, wash three times repeatedly, and ultrasonicate each time 10min, then centrifuged at a speed of 4000r / min for 15min with a high-speed centrifuge, and dried to obtain the green powder product MIL-101. Transfer the synthesized MIL-101 sample to a 100mL round bottom flask, add 50mL ultrapure water, stir well, heat in a water bath at 70°C for 5h, and centrif...

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Abstract

The invention relates to an aqueous phase metal organic framework molecular imprinting material of enriched trace meta-tolyl-N-methylcarbamate (MTMC). The product is prepared by the following steps: with a metal organic framework material MIL-101 subjected to aqueous-phase synthesis as a supporter, MTMC as a template molecule, 3-aminopropyltriethoxysilane as a functional monomer, and with tetraethoxysilane as a crosslinking agent, synthesizing a precursor of MIL@MIP through a sol-gel method; and removing the template molecule in the precursor by utilizing Soxhlet extraction, thus obtaining the aqueous phase metal organic framework molecular imprinting material of enriched trace MTMC, namely the MIL@MIP. An imprinting hole which is consistent with a space structure of the template molecule is obtained, and a selective identification effect on the template molecule MTMC is good.

Description

technical field [0001] The invention relates to the field of novel polymer enrichment materials, in particular to a water-phase metal-organic framework molecularly imprinted polymer with good adsorption and separation functions for carbamate pesticide medicarb molecules and a preparation method thereof. The specific surface area of ​​the product is larger, so that its mass transfer rate and adsorption capacity are greatly improved compared with previous materials. Background technique [0002] Metolcarb (metolcarb; tsumacide; metacrate), alias m-tolyl-N-methyl-carbamate, molecular formula C 9 h 11 NO 2 , molecular weight 165.2, pure product is white crystal, melting point is 76-77°C, boiling point is 180°C, flash point is 145°C, hardly soluble in water, slightly soluble in ether and benzene, easily soluble in methanol and ethanol, relative density (water = 1) 1.2, decompose in alkaline solution. Belongs to moderately toxic insecticides, non-chronic toxicity, non-carcinog...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/3085B01J20/226B01J20/268
Inventor 王硕王俊平钱坤方国臻
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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