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Application of aggregation-induced fluorescence probe in fingerprint fluorescence imaging

An aggregation-induced fluorescence and fluorescent probe technology is applied in the application field of aggregation-induced fluorescent probes in fingerprint fluorescence imaging, which can solve the problems of low collection efficiency and complicated operation, and achieves low collection efficiency, simple molecular structure, and clear imaging. Effect

Active Publication Date: 2020-01-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This solves the technical problems that the traditional fingerprint collection method has low collection efficiency, complicated operation, and has certain requirements for the collection background.

Method used

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  • Application of aggregation-induced fluorescence probe in fingerprint fluorescence imaging
  • Application of aggregation-induced fluorescence probe in fingerprint fluorescence imaging
  • Application of aggregation-induced fluorescence probe in fingerprint fluorescence imaging

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The fluorescent probe of the present invention can be prepared by a conventional preparation method. The application of the fluorescent probe of the present invention in latent fingerprint fluorescence imaging specifically includes the following steps:

[0042] The solution containing the fluorescent probe is brought into contact with the carrier containing the latent fingerprint, so that the fluorescent probe gathers at the ridgeline of the latent fingerprint. Under ultraviolet light, the excited state of the fluorescent probe molecule is decayed back to The ground state emits fluorescence, thereby realizing fluorescence imaging of latent fingerprints.

[0043] In some embodiments, the solution containing the fluorescent probe is dropped on the carrier containing the latent fingerprint, or the solution containing the fluorescent probe is sprayed on the carrier containing the latent fingerprint, or the solution containing the latent fingerprint is dropped. The fingerprint c...

Embodiment 1

[0057] First prepare an aqueous solution of the dye. Mix the dye and a certain amount of water in a glass bottle, and then put it in an ultrasonic cleaner and ultrasonically mix until the solution has no visible particles. At this point, the fluorescent probe solution for latent fingerprint color detection has been prepared.

[0058] The dye is the fluorescent probe of the present invention, and its molecular structure is shown in formula (1), where Ar 1 for R 1 Is hydroxyethyl; Ar 2 for

[0059] It can be obtained by simple synthesis in one step. Synthesis of compound (E)-2-(4-(4-(2-(pyridin-4-yl)vinyl)phenyl)piperazin-1-yl)ethanol, add 4-(4-( 2-Hydroxyethyl) piperazin-1-yl) benzaldehyde (1eq),: 4-picoline (1eq), potassium tert-butoxide (2eq, the stoichiometric quantity of potassium tert-butoxide is 2, at 2eq You can add more appropriately under the dosage of, which is beneficial to complete the reaction.), then add DMF (dimethylformamide) as a solvent, and finally put in the...

Embodiment 2

[0069] First prepare an aqueous solution of the dye. Mix the dye and a certain amount of water in a glass bottle, and then put it in an ultrasonic cleaner and ultrasonically mix until the solution has no visible particles. At this point, the fluorescent probe solution for latent fingerprint color detection has been prepared.

[0070] The dye is the fluorescent probe of the present invention, and its molecular structure is shown in formula (1), where R 3 Is hydroxyethyl; Ar 1 for Ar 2 for

[0071] It can be synthesized by a simple one-step reaction. Similar to Example 1, also aldehyde React with picoline to obtain the final product.

[0072] As in Example 1, using the fluorescent probe for the fluorescent imaging detection of latent fingerprints with a plastic petri dish substrate can be obtained as Figure 4 , It can be seen from the figure that the fingerprint imaging is clear, and the fingerprint feature recognition is very high.

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Abstract

The invention relates to the field of new material fluorescence probes, and more particularly to the application of an aggregation-induced fluorescence probe in fingerprint fluorescence imaging. The fluorescence probe has a general structural formula shown in formula (1): wherein R1 and R2 are substituent groups at any position of Ar1 and Ar2, and at least one of R1 and R2 is a hydrophilic group;and Ar1 and Ar2 are aromatic rings. By using the fluorescent probe provided by the invention and by using an ordinary digital single lens reflex camera, a potential fingerprint on the surface of a smooth object can be displayed by an ultraviolet light exciting method. Fluorescence fingerprint imaging with low background noise, high brightness and high definition is obtained more conveniently and directly.

Description

Technical field [0001] The invention relates to the field of fluorescent probes of new materials, and more specifically, to the application of an aggregation-induced fluorescent probe in fingerprint fluorescence imaging. Background technique [0002] Fingerprints refer to the raised ridges and sunken valleys on the skin surface of the fingers, which together form specific lines. The characteristics of its lines have been fixed in a person's infancy. Fingerprints are composed of stratum corneum cells that have lost their activity on the surface of the skin. Even if they are constantly worn out in life, as long as they do not damage the dermal tissue, they will still grow naturally and will not change. When our fingers touch the face, neck, and hair follicles, the sebum content in these papillary ridges will increase. Then, when the sebum-rich papillary ridges touch the surface material made of aluminum, quartz, mica, coins, and porcelain. The object will leave a pattern of mirro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6428G01N21/6456G01N21/6486
Inventor 李冲田蕊朱明强王亚龙
Owner HUAZHONG UNIV OF SCI & TECH
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