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Research Articles

A N2O2-tetradentate dioxime fluorescence probe for highly efficient sensing of S2– and solution discoloration detection of H2S gas

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Pages 1263-1272 | Received 15 Mar 2022, Accepted 07 Jun 2022, Published online: 20 Jun 2022
 

Abstract

A symmetrical N2O2-tetradentate dioxime chemical sensor H2L was synthesized for the first time. The sensor H2L can identify S2– ion with dual channels of fluorescence–ultraviolet spectra, and through the calculation of binding constant and detection limit of L-S system, it was showed that H2L can detect S2– ion with high efficiency and specificity. pH response experiments were carried out on L-S system and H2L to explore the pH range recognized by them. The recognition mechanism was determined by 1H NMR titration experiment. At the same time, a new method of macro recognition by means of naked eye recognition (under natural light and ultraviolet light of 365 nm) and filter paper recognition was developed. The practical application of the sensor H2L to detect H2S was evaluated in actual water samples and identification experiment of H2S.

GRAPHICAL ABSTRACT

Disclosure statement

The authors declare no conflict of interest.

Additional information

Funding

This work was supported by Gansu Science and Technology Planning Program (No. 20JR2RA002) and the Open Foundation of Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University (No. 21YRWEK004), two of which are gratefully acknowledged.

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