Application of benzothiazole derivatives in anti-counterfeiting and food detection

A technology of benzothiazole and derivatives, which is applied in the application field of benzothiazole derivatives, can solve the problems of limiting the practical application of sensing materials and the limited sensing ability, and achieves the effect of realizing multiple anti-counterfeiting and accurate multiple anti-counterfeiting.

Active Publication Date: 2022-04-15
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sensing capability is limited to the solution state in most cases, i.e., both the sensor and the analyte are in solution, which again limits the practical application of these sensing materials in real-time sensing.

Method used

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  • Application of benzothiazole derivatives in anti-counterfeiting and food detection
  • Application of benzothiazole derivatives in anti-counterfeiting and food detection
  • Application of benzothiazole derivatives in anti-counterfeiting and food detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: Aggregation-induced fluorescence enhancement of benzothiazole derivatives (1).

[0053] Take 3 μL of the benzothiazole derivative (1) mother liquor and add it to 3 mL of acetonitrile and deionized water mixed solvent (the volume ratio of acetonitrile and water is: 10:1, 8:2, 6:4, 4:6, 2: 8, 0:10), to detect changes in fluorescence intensity, see figure 1 . Detect the fluorescence emission intensity at 513nm at different water contents in the mixed solvent of acetonitrile and deionized water. Take the content of deionized water as the horizontal axis and the fluorescence intensity at 513nm as the vertical axis to draw a graph. When the content of deionized water is greater than 90%, the Sudden increase in fluorescence, see figure 2 . The aggregation-induced fluorescence enhancement effect of benzothiazole derivatives (1) can be used for solid-state fluorescence applications.

Embodiment 2

[0054] Example 2: Fluorescence analysis of the benzothiazole derivative (1) in deionized water with the pH value first increasing and then decreasing.

[0055] Take 100 μL of the benzothiazole derivative (1) mother liquor and add it to 100 mL of deionized water. The pH meter measures its pH value as 5.52, and adjusts the pH value to 7.62, 9.10, 10.01, 11.60, and 13.03 with 1M and 0.1M sodium hydroxide solutions, respectively. , to detect fluorescence emission peaks and intensity changes. As the pH value gradually increased to 10.01, the fluorescence emission peak gradually blue-shifted from 513nm to 458nm, accompanied by fluorescence enhancement; as the pH value continued to increase to 13.03, the fluorescence emission peak gradually red-shifted from 458nm to 497nm. Accompanied by a decrease in fluorescence intensity, see image 3 . Thereafter, the pH values ​​were adjusted to 12.41, 10.42, 9.38, 7.90, 5.61, and 2.95 with 1M and 0.1M hydrochloric acid solutions, respectively...

Embodiment 3

[0056] Example 3: Fluorescence analysis of the benzothiazole derivative (1) in deionized water with the pH value first decreasing and then increasing.

[0057] Take 100 μL of the benzothiazole derivative (1) mother liquor and add it to 100 mL of deionized water. The pH meter measures its pH value as 5.53, and adjusts the pH value to 3.61 and 1.97 with 1 M and 0.1 M hydrochloric acid solutions, respectively, and detects the fluorescence emission peak and intensity change . As the pH value gradually decreases to 1.97, the fluorescence emission peak at 513nm shows an overall downward trend; see Figure 5 . Thereafter, the pH values ​​of the solutions were gradually increased to 2.59, 7.25, 9.97, 11.00, and 12.81, respectively. When the pH value increased to 9.97, the fluorescence emission peak gradually blue-shifted from 513nm to 458nm, accompanied by fluorescence enhancement; as the pH continued to increase to 12.81, the fluorescence emission peak gradually red-shifted from 45...

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Abstract

The application of benzothiazole derivatives in anti-counterfeiting and food detection, the anti-counterfeiting labels prepared as ink fillers respond to multiple stimuli of acid and alkali, which can realize multi-color changes of anti-counterfeiting labels to achieve multiple anti-counterfeiting purposes. The advantage of the material is that it can not only realize the reversible discoloration of ammonia, but also realize the multi-color change of the same anti-counterfeiting label due to the strength of acid and alkali and the order of adding acid and alkali. The combination of reversible discoloration and multi-color change makes anti-counterfeiting. The label is more difficult to copy. Compared with other anti-counterfeiting luminescent materials, the fluorescent material of the present invention has the characteristics of rapidity, changeability and easy implementation. In the same closed space, the process of food spoilage will be displayed in the form of green fluorescence changing to blue fluorescence. Compared with other materials used for monitoring food spoilage, the fluorescent material of the present invention has the advantages of low cost, simplicity and high efficiency. Features.

Description

technical field [0001] The invention relates to the technical field of application of benzothiazole derivatives, in particular to the application of benzothiazole derivatives in anti-counterfeiting and food detection. Background technique [0002] Globally, counterfeit goods pervade every aspect of modern society and have long been a threat to public property. Therefore, it is urgent to use an anti-counterfeiting label with a unique identification technology that is easy to read and difficult to copy to resist counterfeit and shoddy goods (Nanoscale, 2017, 9: 15982-15989). In the past few decades, a variety of advanced anti-counterfeiting technologies have been developed, including magnetic response, plasma security labels, and fluorescent patterns, etc. Due to the ease of preparation and visual convenience, fluorescent patterns have become widely used security elements for anti-counterfeiting. However, ordinary anti-counterfeiting fluorescent materials are generally monoch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D25/387B42D25/20G01N21/64
CPCB42D25/387B42D25/20G01N21/6428
Inventor 徐勇前张奇
Owner NORTHWEST A & F UNIV
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