Fingerprint fluorescence fumigation developing reagent and developing method thereof

A fluorescent agent and fluorescence technology, applied in fluorescence/phosphorescence, material analysis through optical means, sensors, etc., can solve the problem of slow progress in the improvement of "502" glue fumigation and display technology, and little improvement in the properties of "502" glue, etc. question

Active Publication Date: 2021-03-09
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since it was first used by the Criminal Appraisal Department of the Japanese National Police Bureau in 1978, the improvement of "502" rubber fumigation technology has been slow, mainly focusing on the design and development of fumigation equipment, and little is involved in the improvement of the properties of "502" glue itself, especially Especially for some trace-bearing objects that are difficult to print, the "502" glue currently on the market cannot meet these needs

Method used

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  • Fingerprint fluorescence fumigation developing reagent and developing method thereof
  • Fingerprint fluorescence fumigation developing reagent and developing method thereof
  • Fingerprint fluorescence fumigation developing reagent and developing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] [Example 1] Preparation of 1-chloro-6-ethoxy-1,2,4,5-tetrazine (method 1):

[0067] Add dichloro-s-tetrazine (1 g, 6.66 mmol) into absolute ethanol (4.68 ml, 79.92 mmol), stir at room temperature for 0.5 h, dichloro-tetrazine dissolves, and continue stirring for 1.5 h. Extracted with ethyl acetate and water, dried over anhydrous sodium sulfate, separated and purified to obtain 781 mg of the target compound.

Embodiment 2

[0068] [Example 2] Preparation of 1-chloro-6-ethoxy-1,2,4,5-tetrazine (method 2):

[0069] Add dichloro-s-tetrazine (1 g, 6.66 mmol) into absolute ethanol (4.68 ml, 79.92 mmol), stir at room temperature for 0.5 h, dichloro-tetrazine dissolves, and continue stirring for 1.5 h. After adding 30ml of water, a red solid precipitated out, filtered it with suction, replaced solvent oil with acetonitrile and pumped it dry, and repeated twice to obtain 608 mg of the target compound. 1H NMR (400 MHz, Chloroform-d) δ 4.75 (q, J=7.1 Hz, 2H), 1.60 (t, J=7.1 Hz, 3H). LCMS: m / z=161(M+H)+

Embodiment 3

[0070] [Example 3] Preparation of 1-chloro-6-(2-fluoroethoxy)-1,2,4,5-tetrazine:

[0071] Add dichloro-s-tetrazine (500mg, 3.33mmol) into 5ml of dichloromethane, add 0.2ml of 2-fluoroethanol and 0.39ml of 2,6-lutidine at room temperature, stir at room temperature for 2h, extract with dichloromethane and water , dried over anhydrous sodium sulfate, separated and purified to obtain 318 mg of the target compound. 1H NMR (400MHz, Chloroform-d) δ 4.82 (m, 2H), 4.76 (m, 2H). LCMS: m / z=179(M+H)+

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Abstract

The invention provides a fingerprint fluorescence fumigation developing reagent and a developing method thereof, and particularly provides a fingerprint fluorescence fumigation developing agent. The fingerprint fluorescence fumigation developing reagent comprises a fluorescent agent and a peptizing agent. The fingerprint fluorescence fumigation developing reagent provided by the invention can effectively realize nondestructive, efficient and sensitive fingerprint fluorescence development, and has good application prospects in criminal investigation, evidence extraction and other aspects.

Description

technical field [0001] The invention relates to the technical field of criminal investigation, in particular, the invention provides a fingerprint fluorescent fumigation reagent and a display method thereof. Background technique [0002] Fingerprint reconstruction at crime scenes often plays a key role in criminal investigations and court proceedings. Common latent fingerprint display techniques mainly include physical, chemical, and optical methods. In practice, the corresponding display method is usually selected according to the different properties of latent fingerprints and trace objects. For non-permeable objects, 2-cyanoacrylate ethyl fingerprint fumigation method (that is, "502" glue fumigation method) is the most commonly used method. Due to the strong volatility of "502" glue, it reacts with potential fingerprints in a gaseous state, which is very beneficial to the use of large-area and complex-shaped mark-bearing objects. [0003] Since it was first used by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/1172G01N21/64
CPCA61B5/1172G01N21/6428
Inventor 朱继东梁彦林李子文糜忠良曹恒义蔡伟思李玮高畅
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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