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Highly Sensitive Detection of Iron Ions in Aqueous Solutions Using Fluorescent Chitosan Nanoparticles Functionalized by Rhodamine B

[Image: see text] Detection of iron ions in aqueous solutions is of significant importance because of their important role in the environment and the human body. Herein, a fluorescent rhodamine B-functionalized chitosan nanoparticles probe is reported for the efficient detection of iron ions. The ch...

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Detalles Bibliográficos
Autores principales: Liu, Zhiwei, Li, Na, Liu, Ping, Qin, Zhihui, Jiao, Tifeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8851898/
https://www.ncbi.nlm.nih.gov/pubmed/35187371
http://dx.doi.org/10.1021/acsomega.1c07071
Descripción
Sumario:[Image: see text] Detection of iron ions in aqueous solutions is of significant importance because of their important role in the environment and the human body. Herein, a fluorescent rhodamine B-functionalized chitosan nanoparticles probe is reported for the efficient detection of iron ions. The chitosan nanospheres-rhodamine B (CREN) was prepared by grafting rhodamine B onto the surface of chitosan nanospheres through an amidation reaction. The as-prepared CREN fluorescent probes exhibit high fluorescence intensity under ultraviolet light. When iron ions are added to the CREN solution, they can be coordinated with weak-field ligands such as N and O on the surface of chitosan nanoparticles (CSNP) by a high-spin method. The self-assembly of Fe(3+) on the surface of the CREN led to the generation of single electrons and the presence of high paramagnetism, resulting in fluorescence quenching. The quenching effect of Fe(3+) on the CREN fluorescent probe can achieve the efficient detection of Fe(3+), and the detection limit reaches 10(–5) mol/mL. Moreover, this fluorescence quenching effect of Fe(3+) on the CREN fluorescent probe is specific, which could not be disturbed by other metal ions and counteranions.