Fluorescent porous material as well as preparation method and application thereof

A porous material and fluorescence technology, applied in the field of fluorescent porous materials and their preparation, can solve problems such as the inability to achieve fluorescence response

Active Publication Date: 2022-05-03
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To achieve a sensitive fluorescent response, the COF material needs to have a narrow pore size, and fluorescent molecules generally have a large conjugated structure, so that the minimum pore size of the constructed fluorescent COF is 0.8nm, which cannot achieve a sensitive fluorescent response.

Method used

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  • Fluorescent porous material as well as preparation method and application thereof
  • Fluorescent porous material as well as preparation method and application thereof
  • Fluorescent porous material as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0042] Another aspect of the present invention provides a method for preparing a fluorescent porous material, comprising: adding building molecules and linear connecting rod fluorescent molecules into a solvent to prepare a suspension, reacting the suspension, and centrifuging the solid vacuum to desorb the guest Molecular post-preparation obtained.

[0043] In the preparation method of the fluorescent porous material provided by the present invention, the building molecule is selected from tetraaminophenylmethane.

[0044] In the preparation method of the fluorescent porous material provided by the present invention, the linear linkage fluorescent molecules are selected from linear aromatic hydrocarbon molecules. Further, the linear connecting rod fluorescent molecules are selected from linear anthracene-based connecting rod molecules, and further, the linear connecting rod fluorescent molecules are selected from 9,10-diphenylanthracene derivatives.

[0045] In the preparati...

Embodiment 1

[0054] The synthetic route of ST-330

[0055]

[0056] Synthesis and activation method of ST-330

[0057] Weigh the derivative AnDA (4,4'-(2,3,6,7-tetramethoxyanthracene-9,10-diyl)dibenzaldehyde, 120mg, 0.237mmol) of 9,10-diphenylanthracene in a 20ml vial, and Disperse in 5ml 1,4-dioxane, add acetic acid solution (6M, 1ml) and 0.3ml aniline, and then ultrasonically disperse the monomer evenly to form a very light yellow suspension. Tetraaminophenylmethane (50 mg, 0.131 mmol) was weighed and dissolved in 5 ml of 1,4-dioxane, and then added to the prepared AnDA dispersion solution. The mixed suspension was reacted in an oven at 80° C. for 3 days. After 1 day, a small amount of solid will be produced. Centrifuge to take the supernatant and continue to react at 80°C. After 3 days, a large amount of yellow solid is observed at the bottom of the bottle. After cooling to room temperature, centrifuge to take the solid, and use 1,4-dioxane solvent Wash 3 times with 5ml each time,...

Embodiment 2

[0059] Fluorescent Response of ST-330 to Butane Gas Molecules

[0060] Transfer the ST-330 prepared in Example 1 to a gas adsorption instrument, and during the adsorption test, irradiate the ST-330 that has adsorbed butane gas in the adsorption tube with an ultraviolet lamp, and take pictures with a camera to record its fluorescence, as shown in figure 1 . Since the material of the adsorption tube is quartz, the influence on the fluorescence of ST-330 can be ignored. During the test, a camera was also used to record the fluorescence changes of butane under the irradiation of ultraviolet light at the same position under a specific pressure. The water bath needs to be lowered when taking pictures. The temperature change in this process has a negligible effect on the gas adsorption of butane. The laboratory for testing the adsorption keeps the temperature at 22-24°C all year round. The gas adsorption test was completed on the BELSORP-max instrument of MicrotracBEL Corp in Japan...

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Abstract

The invention relates to the field of gas-phase fluorescence detection of small organic molecules, in particular to a fluorescent porous material as well as a preparation method and application thereof. According to the structure of the fluorescent porous material, A is selected from tetrahedral building groups, B is selected from linear connecting rod fluorescent groups, and the fluorescent porous material is of a three-dimensional extension structure formed by covalent bonds between the tetrahedral building groups. The invention provides a high-crystallinity COF fluorescent porous material with sensitive fluorescent response to various organic gas molecules. The COF has fluorescence response to different gas molecules, especially alkane molecules, and can be used for molecular recognition due to the fact that the COF has fluorescence response to different colors to different gas molecules.

Description

technical field [0001] The invention relates to the field of gas-phase fluorescence detection of small organic molecules, in particular to a fluorescent porous material and its preparation method and application. Background technique [0002] Traditional fluorescent molecules and novel AIE molecules exhibit rich photophysical properties, but both have obvious concentration-dependent properties and instability (poor reproducibility), which limits their material applications. [0003] The detection of organic gas molecules, especially alkane molecules, is difficult to use semiconductor detectors and traditional fluorescence detection methods based on energy transfer due to their very small polarity close to 0 and no interaction with fluorescent molecules such as energy transfer. Check it out. New systems and methods need to be developed for sensitive fluorescence response of alkanes. After the fluorescent molecules are excited, the energy is dissipated in the form of radiati...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07C251/24C07C249/02C08G83/00G01N21/64
CPCC09K11/06C07C251/24C07C249/02C08G83/008G01N21/64C07C2603/24C09K2211/1007C09K2211/1011C09K2211/1014C09K2211/1416C09K2211/1425C09K2211/1433
Inventor 章跃标魏蕾
Owner SHANGHAI TECH UNIV
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