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A kind of chiral fluorescent liquid crystal with three primary colors at room temperature and its preparation method

A three-color, chiral technology, applied in the field of optical materials, can solve the problems of fluorescent anti-counterfeiting pattern cloning, etc., and achieve the effect of easy industrial production, high yield and improved safety

Active Publication Date: 2021-11-16
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, once the fluorescent compound is disclosed, the fluorescent anti-counterfeiting pattern still has the risk of being cloned

Method used

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  • A kind of chiral fluorescent liquid crystal with three primary colors at room temperature and its preparation method
  • A kind of chiral fluorescent liquid crystal with three primary colors at room temperature and its preparation method
  • A kind of chiral fluorescent liquid crystal with three primary colors at room temperature and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A chiral fluorescent liquid crystal with dual anti-counterfeiting mechanism with three primary colors at room temperature, its structural formula is as follows:

[0047]

[0048] The preparation method is as follows:

[0049] (1) Raw materials: undecylenyl chloride, pyrenemethanol, triethylamine, methanol, tetrahydrofuran, chiral liquid crystal monomers containing double bonds and chiral mesogens 1: cholesteryl allyloxybenzoate, containing Liquid crystal monomer 2 with double bonds and rod-like fluorine-containing mesogens: 3,4-difluorophenylbicyclohexylbutene, polymethylhydrogensiloxane (PMHS): about 3 active hydrogens, catalyst: Hexachloroplatinic Acid.

[0050] (2) Preparation of double bond-containing fluorescent monomer 3:

[0051] Weigh pyrenemethanol (1.5g, 6.46mmol) and dissolve it in 15mL tetrahydrofuran, transfer this solution into a 100mL single-necked flask, add a small amount of triethylamine as an acid absorbing agent, weigh undecylenoyl chloride (1.3...

Embodiment 2

[0062] A chiral fluorescent liquid crystal with dual anti-counterfeiting mechanism with three primary colors at room temperature, its structural formula is as follows:

[0063]

[0064] The preparation method is as follows:

[0065] (1) Raw materials: undecylenyl chloride, pyrenemethanol, triethylamine, methanol, tetrahydrofuran, chiral liquid crystal monomers containing double bonds and chiral mesogens 1: cholesteryl allyloxybenzoate, containing Liquid crystal monomer 2 with double bonds and rod-like fluorine-containing mesogens: 3,4-difluorophenylbicyclohexylbutene, polymethylhydrogensiloxane (PMHS): about 3 active hydrogens, catalyst: Hexachloroplatinic Acid.

[0066] (2) Preparation of double bond-containing fluorescent monomer 3:

[0067] Weigh pyrenemethanol (1.5g, 6.46mmol) and dissolve it in 15mL tetrahydrofuran, transfer this solution into a 100mL single-necked flask, add a small amount of triethylamine as an acid absorbing agent, weigh undecylenoyl chloride (1.3...

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PUM

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Abstract

The invention discloses a chiral fluorescent liquid crystal with dual anti-counterfeiting mechanism and a preparation method thereof with three primary colors at room temperature. Alkane graft copolymerization constructs a chiral fluorescent liquid crystal with three primary colors at room temperature with a dual anti-counterfeiting mechanism, and the structure is shown in formula I. At room temperature (0-25°C), under bright-field visible light, due to the Bragg selective reflection of the chiral fluorescent liquid crystal, when the angle between the line of sight and the chiral fluorescent liquid crystal plane film changes from 90° to 30°, the hand-held fluorescent liquid crystal of the present invention The color reflected by the chiral fluorescent liquid crystal gradually changes from red to green; under dark field and 310nm ultraviolet light, the chiral fluorescent liquid crystal of the present invention can emit blue characteristic fluorescence. The chiral fluorescent liquid crystal prepared by the invention can realize the three primary colors of red, green and blue within the range of room temperature (0-25 DEG C), and has broad application prospects in the field of anti-counterfeiting.

Description

technical field [0001] The invention relates to a double anti-counterfeiting mechanism chiral fluorescent liquid crystal with three primary colors at room temperature and a preparation method thereof, belonging to the technical field of optical materials. Background technique [0002] Counterfeiting is a worldwide problem with extremely serious implications for the economy, human health, and national security. At present, anti-counterfeiting technology has been widely used in medicine, currency, electronic products, certificates, jewelry and other fields. Stimuli-responsive materials can be made into graphic-encoded anti-counterfeiting markers due to their high encoding capacity. Among various anti-counterfeiting materials, fluorescent materials are widely used in the field of anti-counterfeiting due to their easily detectable chemical properties, and play an important role in anti-counterfeiting. However, once the fluorescent compound is disclosed, the fluorescent anti-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07J51/00C09K11/06C09K19/36
CPCC07J51/00C09K11/06C09K19/36C09K2211/1007C09K2211/1011
Inventor 么冰赵国峰吴昊莫晨曦孟子杰刘浩经涛
Owner XUZHOU UNIV OF TECH