Naphthalimide fluorine ion fluorescent probe as well as preparation method and application thereof

By introducing a triphenylamine derivative into a naphthimide-based fluorescent probe for fluoride ions, a donor-π-acceptor system was constructed, which solved the problems of complex structure and poor applicability of existing probes, and achieved highly selective and sensitive fluoride ion detection applicable to a variety of solvent systems.

CN122444776APending Publication Date: 2026-07-24JILIN INST OF CHEM TECH
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Patent Information

Application Number
CN202610721670.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-25
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing fluoride ion fluorescent probes suffer from problems such as complex structural design, cumbersome synthesis steps, poor applicability in aqueous or water/organic solvent mixtures, susceptibility to interference from other anions, slow response speed, or insufficient sensitivity.

Method used

A naphthalimide-based fluoride ion fluorescent probe was designed by introducing triphenylamine and its derivatives as strong electron donor groups into the 1,8-naphthalimide molecule to construct a donor-π-acceptor (D-π-A) system, thereby enhancing the intramolecular charge transfer effect. This resulted in a fluorescent probe that is easy to synthesize, highly selective and sensitive to fluoride ions, and applicable to a variety of systems.

Benefits of technology

It achieves highly selective and sensitive fluoride ion detection, with simple synthesis steps and fast response speed. It is suitable for pure water, organic solvents or water/organic solvent mixtures, and has potential application value, especially in environmental water samples.

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Abstract

The invention is applicable to the technical field of fluorine ion fluorescence analysis and detection, and provides a naphthalimide fluorine ion fluorescence probe as well as a preparation method and application thereof. 1, 8-naphthalimide which has the characteristics of high fluorescence quantum yield, excellent light stability, easiness in structural modification and the like is taken as a basic fluorophore, triphenylamine and derivative strong electron donor groups thereof are introduced into a molecular structure of the basic fluorophore, and a typical donor-pi-acceptor (D-pi-A) system is constructed, so that an intramolecular charge transfer effect is enhanced, and the fluorescence intensity of the fluorescent probe is improved. The invention develops a fluorescent probe system which is reasonable in structural design, simple and convenient to synthesize, high in selectivity and high in sensitivity to fluorine ions and suitable for various systems, and when fluorine ions exist in pure water, an organic solvent or a water / organic solvent mixed system, the fluorescent response performance and the detection sensitivity of the probe are improved. The fluorescent probe can change the solution color and the fluorescence intensity along with the increase of the concentration of the fluorine ions, and can directly realize rapid specific recognition on the fluorine ions.
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