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Preparation method and application of a luminescent metal organic framework material

A metal-organic framework and organic framework technology, applied in luminescent materials, material analysis by optical means, material analysis, etc., can solve the problem that luminescent metal-organic framework materials are rarely reported, and achieve easy promotion, large specific surface area and practicality. strong effect

Active Publication Date: 2021-11-19
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the detection of small organic molecules, dye molecules and nitro-explosives using luminescent metal-organic frameworks has been widely reported, but there are few reports on luminescent metal-organic frameworks for the detection of pH.

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  • Preparation method and application of a luminescent metal organic framework material
  • Preparation method and application of a luminescent metal organic framework material
  • Preparation method and application of a luminescent metal organic framework material

Examples

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preparation example Construction

[0037] Embodiments of the present disclosure provide a preparation method and application of a pH-sensitive luminescent metal-organic framework material with a special morphology. in, figure 1 A flow chart of a method for preparing a light-emitting metal organic framework material according to an embodiment of the present disclosure is shown, as shown in figure 1 As shown, the method for preparing a pH-sensitive luminescent metal-organic framework material with a special morphology according to an embodiment of the present disclosure includes the following steps:

[0038] Step 1: preparing a mixed solution of terbium salt and pyromellitic acid;

[0039] Step 2: crystallize the prepared mixed solution by normal temperature method or hydrothermal method;

[0040] Step 3: washing the crystallized product and collecting the precipitate by high-speed centrifugation; and

[0041] Step 4: drying the precipitate to obtain a terbium-based metal-organic framework material.

[0042] ...

Embodiment 1

[0051] Example 1: Preparation method of luminescent metal organic framework material Tb-PMA with special morphology synthesized at room temperature

[0052] This example provides a method for preparing Tb-PMA, a luminescent metal-organic framework material with special morphology synthesized at room temperature, which specifically includes the following steps: 0.0954 g of pyromellitic acid is dissolved in 14 mL of ultrapure water, stirred and dissolved, Add NaOH dropwise to adjust the pH of the solution to 7-8; then add 7 mg of bovine serum albumin and stir well for later use; weigh 0.0566 g Tb (NO 3 )·6H 2 O was dissolved in 1mL ultrapure water, and added dropwise to the above mixed solution, the solution gradually turned into a milky white solution; finally, the solution was kept stirring at room temperature for 30 minutes, washed 2-3 times with ultrapure water, and collected by high-speed centrifugation precipitation.

[0053] image 3 Shows the morphology characterizati...

Embodiment 2

[0054] Example 2: Preparation method of hydrothermally synthesized luminescent metal-organic framework material Tb-PMA-βCD (hydrothermal) with special morphology

[0055] This example provides a method for preparing a hydrothermally synthesized luminescent metal-organic framework material Tb-PMA-βCD (hydrothermal), which specifically includes the following steps: Weigh 0.0954g of pyromellitic acid and dissolve it in 14mL super In pure water, fully stir to dissolve, add NaOH dropwise to adjust the pH of the solution to 7-8; then add 30mg of bovine serum albumin, stir well for later use; weigh 0.0566g Tb(NO 3 )·6H 2 O was dissolved in 1 mL of ultrapure water, and added dropwise to the above mixed solution; the solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and then the reaction kettle was placed in an oven for crystallization at 120°C for 12 hours ; The resulting product was washed 2-3 times with ultrapure water, and the precip...

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Abstract

The present disclosure relates to the technical field of metal organic framework materials, in particular to a preparation method and application of a luminescent metal organic framework material with special morphology and pH value sensitivity. The preparation method of the luminescent metal organic framework material comprises: preparing a mixed solution of terbium salt and pyromellitic acid; crystallizing the prepared mixed solution by using a normal temperature method or a hydrothermal method; washing the crystallized product and collecting the precipitate by high-speed centrifugation; Drying is performed to obtain a terbium-based metal-organic framework material. Application of the luminescent metal organic framework material in pH value detection. The disclosure utilizes the terbium-based metal-organic framework material Tb‑PMA prepared by a normal temperature method or a hydrothermal method, which has a simple preparation process, high material crystallinity, and a large specific surface area, and it is applied to highly sensitive detection of pH changes in solutions, detection High efficiency, strong practicability, easy to popularize.

Description

technical field [0001] The present disclosure relates to the technical field of metal organic framework materials, in particular to a preparation method and application of a luminescent metal organic framework material with special morphology and pH value sensitivity. Background technique [0002] pH value, also known as hydrogen ion concentration index, acid-base value, is a scale of hydrogen ion activity in a solution. No matter in the field of biomedicine or environmental chemistry, the pH value can often reflect various signals of the surrounding environment, and is closely related to human health and environmental pollution. Therefore, the pH value has a wide range of universal application and monitoring value. At present, there are many detection methods for pH value, and the fluorescence method has attracted much attention because of its high sensitivity and good repeatability. Various types of quantum dots have become a common signal source for the detection of pH b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/182G01N21/6428G01N2021/6432
Inventor 黄建永解文月刘瑞娜熊春阳
Owner PEKING UNIV
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