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A light-responsive room temperature phosphorescent supramolecular anti-counterfeiting material and its preparation method

A technology of room temperature phosphorescence and phosphorescent molecules, applied in luminescent materials, chemical instruments and methods, gel preparation, etc., can solve the problems of complex compound synthesis, lower anti-counterfeiting level, inconvenient use, etc.

Inactive Publication Date: 2018-08-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that the reversible switch of room temperature phosphorescence can be realized by the decyclization and cyclization of photochromic compounds, but the synthesis of the reported compounds is complicated, the cost is high, and the phosphorescence intensity cannot be adjusted, so it is very inconvenient to use
Especially in the field of anti-counterfeiting, the anti-counterfeiting level has been reduced

Method used

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  • A light-responsive room temperature phosphorescent supramolecular anti-counterfeiting material and its preparation method
  • A light-responsive room temperature phosphorescent supramolecular anti-counterfeiting material and its preparation method

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Embodiment 1

[0022] This embodiment provides a photoresponsive room temperature phosphorescent supramolecular anti-counterfeiting material, the preparation method of which is as follows: take a clean test tube, add 5mL 1×10 -2 mol / L Pd-TCPP solution in DMSO, 15mL5×10 -1 mol / L NBA DMSO solution, 55mL 1mol / L sodium sulfite aqueous solution, at a stirring speed of 300 rpm, heated to 70°C in a water bath, kept warm for 8 minutes, added 25mL 1.5mol / L DBS DMSO solution, and continued to press Stir at a speed of 300 rpm for 5 minutes, and then statically cool to obtain a supramolecular gel that is a light-responsive room temperature phosphorescent supramolecular anti-counterfeiting material.

Embodiment 2

[0024] This embodiment provides a photoresponsive room temperature phosphorescent supramolecular anti-counterfeiting material, and its preparation method is as follows: take a clean test tube, add 15mL1×10 -2 mol / L Pd-TCPP solution in DMSO, 25mL5×10 -1 mol / L NBA DMSO solution, 25mL 1mol / L sodium sulfite aqueous solution, at a stirring speed of 300 rpm, heated to 70°C in a water bath, kept warm for 10 minutes, added 35mL 1.5mol / L DBS DMSO solution, and continued to press Stir at a speed of 300 rpm for 10 minutes, and then statically cool to obtain a supramolecular gel that is a photoresponsive room temperature phosphorescent supramolecular anti-counterfeiting material.

Embodiment 3

[0026] This embodiment provides a photoresponsive room temperature phosphorescent supramolecular anti-counterfeiting material, and its preparation method is as follows: take a clean test tube, add 10mL 1×10 -2 mol / L Pd-TCPP butanediol solution, 20mL5×(10 -1 mol / L NBA butanediol solution, 30mL 1mol / L sodium sulfite aqueous solution, at a stirring speed of 300 rpm, heated to 70°C in a water bath, kept warm for 9 minutes, and added 40mL of 1.5mol / L DBS butanediol The solution was continuously stirred at a speed of 300 rpm for 8 minutes, and then the supramolecular gel obtained by static cooling was the light-responsive room temperature phosphorescent supramolecular anti-counterfeiting material.

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Abstract

The invention provides a light-response room-temperature phosphorescent supramolecular anti-counterfeit material with adjustable luminous intensity and a preparation method thereof.The material is prepared in the mode that a gelator 1,3:24-benzylidene-sorbitol (DBS) serves as a self-assembly unit, and tetracarbonyl phenyl palladium porphyrins (Pd-TCPP) and o-nitrobenzaldehyde (NBA) are added into DBS and self-assembled into supramolecular gel in a mixed solvent composed of an organic solvent and water.The material has the advantages that before the supramolecular is irradiated by ultraviolet light, room-temperature phosphorescence cannot be generated by optical excitation; when the supramolecular is irradiated by ultraviolet light with the wavelength being 365 nm and the wavelength is excited to be 417 nm, room-temperature phosphorescence with the emission wavelength being 700 nm can be generated; the phosphorescence intensity of the supramolecular material can be controlled through the NBA concentration and ultraviolet light illumination time.The obtained supramolecular gel material has potential application value in the anti-counterfeit field.

Description

technical field [0001] The invention belongs to the field of luminous anti-counterfeiting materials, and in particular relates to a light-responsive room-temperature phosphorescent supramolecular anti-counterfeiting material with adjustable luminous intensity and a preparation method thereof. Background technique [0002] Compared with fluorescence, phosphorescence has a larger Stokes shift, which can avoid the interference of excitation light. At the same time, phosphorescence has a longer lifetime, which can avoid the interference of short-lived fluorescence and scattered light, thereby obtaining a lower detection limit. Fluorescence has been widely used in the field of anti-counterfeiting due to its simple lighting conditions and convenient use. For example, fluorescence technology is used in the anti-counterfeiting of RMB. However, phosphorescence requires low temperature conditions in order to control the non-radiative transition of phosphorescent molecules, which grea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/02B01J13/00
CPCB01J13/0052C09K11/025C09K11/06C09K2211/185
Inventor 王宏朱婷玉杨亚江解孝林郑成赋廖永贵
Owner HUAZHONG UNIV OF SCI & TECH
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