A ratiometric colorimetric fluorescent probe, and a preparation method and application thereof

By synthesizing the ratiometric colorimetric fluorescent probe 2-(2-hydroxy-4-methoxyphenyl)-1H-anthracene[1,2-d]imidazol-6,11-dione, the problems of high cost, large equipment size and difficulty in portability in oxalyl chloride detection were solved, and sensitive and accurate quantitative detection of oxalyl chloride was achieved, which is suitable for real-time applications.

CN117384099BActive Publication Date: 2026-07-14SOUTH CHINA AGRICULTURAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA AGRICULTURAL UNIVERSITY
Filing Date
2023-06-29
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technologies lack sensitive, accurate, and easy-to-operate methods for detecting oxalyl chloride, especially with a limited number of fluorescent probes available. This results in high detection costs, large and difficult-to-move equipment, long detection times, and susceptibility to numerous interfering factors.

Method used

A ratiometric colorimetric fluorescent probe, 2-(2-hydroxy-4-methoxyphenyl)-1H-anthracene[1,2-d]imidazol-6,11-dione, was designed and synthesized in the presence of a catalyst. The probe was then detected by utilizing the ratio change of its fluorescence emission peak in the presence of oxalyl chloride.

Benefits of technology

It achieves sensitive quantitative detection of oxalyl chloride with a detection limit as low as 0.0053 µmol/L. It is simple to operate, low in cost, suitable for real-time detection, and has good optical stability and selectivity.

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Abstract

The application belongs to the technical field of oxalyl chloride detection, and discloses a ratio colorimetric fluorescent probe, a preparation method and application thereof, wherein the ratio colorimetric fluorescent probe is 2-(2-hydroxy-4-methoxyphenyl)-1H-anthracene[1,2-d]imidazole-6,11-dione, abbreviated as PMD, and the chemical structural formula is as follows: The fluorescent probe is synthesized by reacting 1,2-diaminoanthraquinone and 2-hydroxy-4-methoxybenzaldehyde under the condition of a catalyst. The acetonitrile solution of PMD presents red color and emits red fluorescence, the solution becomes yellow after being contacted with oxalyl chloride, and the fluorescence presents yellow color, so that sensitive quantitative detection of oxalyl chloride in a sample can be realized, and the application has the advantages of simple operation, low cost, sensitive response, easy popularization and application, etc.
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