An Innovative Study on the "on-off-on" Detection of Sulfur Ions Based on a TSPP-riboflavin Fluorescent Probe

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 Apr 15

PMID 35424537

Authors

Huan Wang

Wencheng Mu

Yuanyuan Liu

Yongchang Lu

Yuang Qiu

Qin Ma

Affiliations

Soon will be listed here.

Abstract

In this paper, 5,10,15,20-(4-sulphonatophenyl) porphyrin (TSPP) was synthesized by a facile route and used as a fluorescent probe to construct a sensor system based on the high water solubility and high quantum yield. It was found that when riboflavin (RF) was introduced into the TSPP solution, the fluorescence intensity of TSPP decreased for the peaks at 645 nm and 700 nm based on the principle of the electrostatic attractions and hydrophobic interactions between TSPP and riboflavin. When the fluorescence emission peak of riboflavin appeared at 550 nm, the fluorescence sensor system changed from the "on" state to the "off" state. When sulfur ions (S) were further introduced into the TSPP-riboflavin system, the fluorescence intensity of riboflavin was further decreased based on the specific reaction between S and riboflavin. However, the fluorescence signal of TSPP was restored and the fluorescence sensing system changed from the "off" state to the "on" state. Therefore, TSPP was used as a fluorescent probe to construct an "on-off-on" fluorescent sensing system, the linear range of S detected by this system is 5.0 × 10 to 3.6 × 10 M, and the detection limit (LOD) is 1.1 × 10 M. The sensing system has higher accuracy and sensitivity, and it can be successfully used in the sensing of S in real samples.

Citing Articles

Activity-Based Fluorescent Probes for Hydrogen Sulfide and Related Reactive Sulfur Species.

Fosnacht K, Pluth M Chem Rev. 2024; 124(7):4124-4257.

PMID: 38512066 PMC: 11141071. DOI: 10.1021/acs.chemrev.3c00683.

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