A fluorescent sensor based on sulfur nanodots encapsulated into zeolitic imidazolate framework-8 for ultrasensitive detection of tartrazine

Haijian Liu; Miao Wang; Guofu Huang

doi:10.1016/j.saa.2023.123187

A fluorescent sensor based on sulfur nanodots encapsulated into zeolitic imidazolate framework-8 for ultrasensitive detection of tartrazine

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 15:303:123187. doi: 10.1016/j.saa.2023.123187. Epub 2023 Jul 22.

Authors

Haijian Liu¹, Miao Wang², Guofu Huang²

Affiliations

¹ School of Chemical Engineering and Environment, Weifang University of Science and Technology, Shouguang 262700, Weifang, China. Electronic address: liuhaijian.1987@163.com.
² School of Chemical Engineering and Environment, Weifang University of Science and Technology, Shouguang 262700, Weifang, China.

PMID: 37499476
DOI: 10.1016/j.saa.2023.123187

Abstract

A new composite material (SDs@ZIF-8) was synthesized by integrating sulfur nanodots (SDs) into metal-organic frameworks (ZIF-8) through a facile one-step self-assembly strategy. The obtained SDs@ZIF-8 has not only the high adsorption performance of ZIF-8 but also the superior fluorescence characteristics of SDs. The composite featured good dispersibility, stable structure as well as excellent fluorescence in water solution, and can be used as an ideal fluorescent sensor for tartrazine detection. Due to the high specific surface area and adsorption performance of ZIF-8, the prepared composite material can significantly enrich tartrazine, further enhancing the sensitivity of analysis. The fluorescence of SDs @ZIF-8 composite can be effectively quenched by tartrazine through the inner filter effect. The sensing technique exhibited exceptional sensitivity, as evidenced by its impressive detection limit of 6.5 nM across a broad linear range spanning from 0.02 to 90 μM. In addition to its high sensitivity, the technique displayed rapid response times and excellent selectivity. Moreover, the fluorescent sensing technology we developed has been employed successfully for the detection of tartrazine in real samples, which is expected to promote the development of the food safety industry.