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Fast fingerprint development reagent based on MOFs (Metal-Organic Frameworks) precursor and application thereof

A technology of precursors and reagents, applied in the field of rapid fingerprint display reagents, can solve the problems of strong fluorescent powder, great health hazards, easy inhalation of reagents and solvents, etc., and achieve the effect of rapid display process

Inactive Publication Date: 2017-06-20
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods mainly have the following two problems: (1) the used visualization reagents are more harmful to the health of on-site survey personnel, and powder (single powder, synthetic powder, magnetic powder and fluorescent powder, etc.) visualization reagents, volatile reagents and Solvents are easily inhaled; fluorescent powders are highly toxic and carcinogenic, causing technicians to dare not use them
(2) Need to use more accessory tools and operations, such as hot ironing, hot spray, steam, brush display, fumigation, ultraviolet lamp, etc., which makes technicians reluctant to use

Method used

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  • Fast fingerprint development reagent based on MOFs (Metal-Organic Frameworks) precursor and application thereof
  • Fast fingerprint development reagent based on MOFs (Metal-Organic Frameworks) precursor and application thereof
  • Fast fingerprint development reagent based on MOFs (Metal-Organic Frameworks) precursor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pipette 1mL disodium terephthalate aqueous solution (2.0×10 -3 mol L -1 ) and 1mL terbium chloride aqueous solution (20×10 -3 mol L -1 ), mix and shake well, use a dropper to absorb the surface of the latent fingerprint dropped on the glass, after 30s, wash off the excess MOFs precursor with water, the fingerprint pattern can be observed under visible light, and under the irradiation of 254nm ultraviolet lamp, the fingerprint pattern glows green of fluorescence.

Embodiment 2

[0033] Pipette 8mL aqueous solution of potassium 2,6-naphthalene dicarboxylate (2.5×10 -3 mol L -1 ) and 1mL europium nitrate aqueous solution (20×10 -3 mol L -1 ), mix, after 20 minutes, shake well, use a dropper to absorb the latent fingerprint surface dropped on the test bench, after 30s, wash off the excess MOFs precursor with water, the fingerprint pattern can be observed under visible light, and under the irradiation of 365nm ultraviolet lamp , the fingerprint lines emit red fluorescence.

Embodiment 3

[0035] Pipette 8 mL of 1,3,5-tris(4-carboxyphenyl)sodium benzene aqueous solution (2.5×10 -3 mol L -1 ) and 1mL europium chloride aqueous solution (20×10 -3 mol L -1 ), mix and shake well, use a dropper to absorb the surface of the latent fingerprint dropped on the metal, after 30s, wash off the excess MOFs precursor with water, the fingerprint pattern can be observed under visible light, and under the irradiation of 254nm ultraviolet lamp, the fingerprint pattern glows red of fluorescence.

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Abstract

The invention provides a fast fingerprint development reagent based on an MOFs (Metal-Organic Frameworks) precursor and application thereof, which belong to the technical field of fingerprint detection. The fast fingerprint development reagent based on the MOFs precursor is prepared from an organic carboxylate solution and a lanthanide series compound solution. The application comprises the following steps of dripping the MOFs precursor solution on the surface of a latent fingerprint object, and removing an excess solution after 30s, so that fingerprint lines can be observed under a visible light or fluorescence is emitted under the irradiation of an ultraviolet light, and a latent fingerprint on the surface of the object can be clearly developed. The fast fingerprint development reagent provided by the invention has the advantages of simple and practicable application method, fast reaction, little toxic and side effects on users, wide range of adapted object, capability of emitting fluorescence with different colors through changing matching ratio of lanthanide series elements in the lanthanide series compound so as to be adapt to objects with different colors, and the like.

Description

technical field [0001] The invention relates to the technical field of fingerprint detection, in particular to a rapid fingerprint visualization reagent based on metal organic framework materials (MOFs) precursors and an application thereof. Background technique [0002] Fingerprints have the characteristics of being different from person to person, unchanged throughout life, and leaving traces on objects. Fingerprint identification is one of the most reliable methods for personal identification. Scientifically and correctly discovering, extracting, and displaying identification fingerprints are of great importance for carrying out investigation work and punishing crimes. actual effect. [0003] At present, the methods used in on-site fingerprint display mainly include: optical display method, physical display method and chemical display method. These methods mainly have the following two problems: (1) the used visualization reagents are more harmful to the health of on-sit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64C09K11/06A61B5/1172
CPCA61B5/1172G01N21/6428C09K11/06C09K2211/182
Inventor 陈国松刘琦冯艳冯永杰张可玉赵天宇丁燕妮唐美华张之翼
Owner NANJING UNIV OF TECH
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