Visible light response supramolecular gel and preparation method thereof

A supramolecular gel, visible light technology, applied in gel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems of less driving force, insufficient health and environmental protection, etc., to increase the possibility, widen the range of options, low energy effect

Active Publication Date: 2019-10-15
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention aims to provide a visible light-responsive supramolecular gel driven by halogen bonds, wherein by improving the structure of the gel factor, it can not only effectively solve the problem compared with the prior art The ultraviolet light-responsive supramolecular gel system is not healthy and environmentally friendly, and it can solve the problem that the current visible light-responsive supramolecular gel system has too few driving forces to choose from, which limits further development and practical application.

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  • Visible light response supramolecular gel and preparation method thereof
  • Visible light response supramolecular gel and preparation method thereof
  • Visible light response supramolecular gel and preparation method thereof

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preparation example Construction

[0042] The present invention also provides a method for preparing the above-mentioned visible light-responsive supramolecular gel, comprising the following steps:

[0043] (1) dissolving the above-mentioned halogen bond acceptor and halogen bond donor in a solvent, stirring and mixing evenly, and then removing the solvent to obtain a dried gel factor;

[0044] (2) mixing the gel factor obtained in step (1) with an organic solvent, then raising the temperature to completely dissolve the gel factor, thereby obtaining a clear solution;

[0045] (3) cooling the clear solution prepared in step (2) to prepare the supramolecular gel.

[0046] The solvent described in step (1) is used to dissolve the halogen bond acceptor and the halogen bond donor. In order to ensure that the two are mixed evenly according to a certain ratio, first dissolve it in the solvent to achieve good dispersion in the solvent, and then remove the Solvent to obtain dry gel factor. The solvent here is a low-bo...

Embodiment 1

[0052] A visible light responsive supramolecular gel, the critical gel concentration is 1wt%, including 1wt% gel factor and 99wt% methanol; the supramolecular gel has a wavelength of 700nm and a light intensity of 1mW / cm 2 After 300min of visible light irradiation, a gel-sol phase transition occurs, and then with a wavelength of 400nm and a light intensity of 1mW / cm 2 After 300 min of visible light irradiation, the sol changed into a gel again.

[0053] Among them, the structures of the two components of the halogen bond acceptor and the halogen bond donor in gelatin are respectively:

[0054]

[0055] The preparation method of the supramolecular gel is as follows:

[0056] (1) Halogen bond acceptor with halogen bond donor Dissolve in ethyl acetate according to the molar ratio of 1:3, stir and mix evenly, then remove the ethyl acetate in a blast drying oven to obtain a dried gel factor;

[0057] (2) Add 0.01 g of the above-mentioned gelling factor and 0.99 g of methan...

Embodiment 2

[0059] A visible light responsive supramolecular gel, the critical gel concentration is 10wt%, including 10wt% gel factor and 90wt% tetrahydrofuran; the supramolecular gel has a wavelength of 650nm and a light intensity of 10mW / cm 2 After 400min of visible light irradiation, a gel-sol phase transition occurs, and then with a wavelength of 450nm and a light intensity of 10mW / cm 2 After 400 min of visible light irradiation, the sol changed into a gel again.

[0060] Among them, the structures of the two components of the halogen bond acceptor and the halogen bond donor in gelatin are respectively:

[0061]

[0062] The preparation method of the supramolecular gel is as follows:

[0063] (1) Halogen bond acceptor with halogen bond donor Dissolve in dichloromethane according to a molar ratio of 3:1, stir and mix evenly, then remove the dichloromethane in a blast drying oven to obtain a dried gel factor;

[0064] (2) Add 0.1 g of the above-mentioned gelling factor and 0.9 ...

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Abstract

The invention belongs to the field of supramolecular gel, and more particularly relates to a visible light response supramolecular gel and a preparation method thereof. The supramolecular gel comprises a gel factor and an organic solvent, and the supramolecular gel can undergo reversible gel-sol phase transformation under visible light irradiation, wherein the gel factor comprises a halogen bond receptor and a halogen bond donor. The halogen bond receptor contains an electron donating group. The halogen bond donor is a visible light responsive azobenzene derivative in which an electron withdrawing or electron donating group is introduced at the ortho or meta position. According to the invention, through improving the structure of the key gel factor, a halogen bond driven visible light response supramolecular gel is prepared, and compared with the prior art, the problems that the ultraviolet light response supramolecular gel system is not healthy and environment-friendly enough and thevisible light response supramolecular gel system has too few selectable driving force types, thus limiting further development and practical application can be effectively solved.

Description

technical field [0001] The invention belongs to the field of supramolecular gels, and more specifically relates to a visible light-responsive supramolecular gel and a preparation method thereof. Background technique [0002] Photoresponsive supramolecular gelling factors usually contain photoactive groups, which can change the chemical structure of the gelling factor through the irradiation of ultraviolet light or visible light, thereby regulating the self-assembly of internal molecules and changing the structure of the gel network. The gel undergoes a gel-sol phase transition. [0003] The light-responsive supramolecular gels currently reported mainly use azobenzene as the photoactive group, which can undergo cis-trans isomerization under ultraviolet light irradiation to achieve the purpose of light-regulated gel-sol phase transition. However, such gels must use ultraviolet light as an external stimulus, which inevitably brings some health and environmental problems. Comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
CPCB01J13/0065
Inventor 廖永贵童勋解孝林胡海思周兴平
Owner HUAZHONG UNIV OF SCI & TECH
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