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Double ingredients organic gelatin and liquid crystal gelatin and its preparation method

An organic gel, liquid crystal technology, applied in the field of supramolecular chemistry, can solve the problems such as the liquid crystal behavior change of a small amount of liquid crystal compounds that have not yet been seen

Inactive Publication Date: 2006-12-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the literature reports, most of the research focuses on the gelation process of the fibrous gelling factor on the liquid crystal compound during the cooling process. It has not been seen that a small amount of liquid crystal compound (≤20wt-%) decreases with temperature in a large amount of gelling factor. Changes in the behavior of liquid crystals are reported

Method used

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  • Double ingredients organic gelatin and liquid crystal gelatin and its preparation method
  • Double ingredients organic gelatin and liquid crystal gelatin and its preparation method
  • Double ingredients organic gelatin and liquid crystal gelatin and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take liquid crystal compound (n=10) 8% (w / w) in the mixture as an example

[0034] Preparation of the two-component mixture: 92 mg of the gel factor (n=17) and 8 mg of the liquid crystal compound (n=10) were mixed and dissolved in 1,4-dioxane, and the solvent was evaporated to dryness to obtain the liquid crystal compound (n=10) 10) is an 8% homogeneous mixture.

[0035] Preparation of organogel: Accurately weigh 10 mg of the above mixture and place it in a 1.5 mL glass bottle, pipette 0.5 mL of analytically pure 1,4-dioxane into the bottle. Heat to dissolve the mixture completely, and cool at room temperature to obtain 1,4-dioxane organogel with a concentration of 20 mg / mL.

[0036] Preparation of liquid crystal gel: Take a certain amount of the mixture of the above two compounds and place it on the hot stage of a polarizing microscope, and slowly raise the temperature (heating rate 6°C / min) until the mixture completely becomes an isotropic liquid (greater than 235°C ...

Embodiment 2

[0038] Take liquid crystal compound (n=10) 20% (w / w) in the mixture as an example

[0039] Preparation of the two-component mixture: 80 mg of the gel factor (n=17) and 20 mg of the liquid crystal compound (n=10) were mixed and dissolved in 1,4-dioxane, and the solvent was evaporated to dryness to obtain the liquid crystal compound (n=10) 10) is a 20% homogeneous mixture.

[0040] Preparation of organogel: Accurately weigh 20 mg of the above mixture and place it in a 1.5 mL glass bottle, pipette 0.5 mL of analytically pure 1,4-dioxane into the bottle. Heat to dissolve the mixture completely, and cool at room temperature to obtain 1,4-dioxane organogel with a concentration of 40 mg / mL.

[0041] Preparation of liquid crystal gel: Take a certain amount of the mixture of the above two compounds and place it on the hot stage of a polarizing microscope, and slowly raise the temperature (heating rate 4°C / min) until the mixture completely becomes an isotropic liquid (greater than 235°...

Embodiment 3

[0043] Take liquid crystal compound (n=4) 10% (w / w) in the mixture as an example

[0044] Preparation of the two-component mixture: 90 mg of the gel factor (n=17) and 10 mg of the liquid crystal compound (n=4) were mixed and dissolved in 1,4-dioxane, and the solvent was evaporated to dryness to obtain the liquid crystal compound (n=4). 4) is a 10% homogeneous mixture.

[0045] Preparation of organogel: Accurately weigh 10 mg of the above mixture and place it in a 1.5 mL glass bottle, pipette 0.5 mL of analytically pure 1,4-dioxane into the bottle. Heat to dissolve the mixture completely, and cool at room temperature to obtain 1,4-dioxane organogel with a concentration of 20 mg / mL.

[0046] Preparation of liquid crystal gel: Take a certain amount of the mixture of the above two compounds and place it on the hot stage of a polarizing microscope, and slowly raise the temperature (heating rate 5°C / min) until the mixture completely becomes an isotropic liquid (greater than 215°C ...

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Abstract

The invention relates the organagel and liquid crystal-gel and preparing method. The structural formula of liquid crystal-gel is (R-O(CH2)nO-C6H4-NHCONH-)3(-1, 3, 5-C6H3) (R: 4-CN-C6H4N=NC6H4-, n>=4), and the structural formula of gel is (CH3(CH2)n-NHCO-)3(-1, 3, 5-C6H3) (n>=8). The mixture can make dioxide hexacyclic ring form organagel. The method comprises the following steps: heating the mixture, at the course of cooling, forming lyotropic liquid crystal, and then forming ordered arrangement liquid crystal-gel. The organagel and liquid crystal-gel can be used in catalysis, molecule switch, chemical sensing, drug delivery, drug segregation, specific optical device, and display unit and nanometer material mould.

Description

technical field [0001] The invention belongs to the technical field of supramolecular chemistry, and specifically relates to a class of liquid crystal compounds and a class of two-component organic gels and liquid crystal gels obtained through the interaction of intermolecular hydrogen bonds with a class of gelling factors capable of gelling organic solvents and its preparation method. Background technique [0002] Certain small organic molecular compounds can gel organic solvents at very low concentrations and become organogels. This type of organic compound is called gelator. Gelator is heated and melted in an organic solvent. During the cooling process, it self-assembles into an ordered fibrous structure through weak intermolecular interactions, and then forms a three-dimensional network structure. , so that small solvent molecules gel. Organogels are physical gels that are thermoreversible. By introducing a second molecule to form a co-gel (Co-gel), the structure of t...

Claims

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Application Information

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IPC IPC(8): C09K19/02
Inventor 易涛周义锋徐淼黄春辉
Owner FUDAN UNIV
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