Construction of a Hg2+-Sensitive Fluorescent Probe Derived from Rhodamine B

International Journal of Applied Chemistry

© 2025 by SSRG - IJAC Journal

Volume 12 Issue 2

Year of Publication : 2025

Authors : Haoran Zhang, Yuqi Huang, Yuankai Liu, Jun Zhang

10.14445/23939133/IJAC-V12I2P101

How to Cite?

Haoran Zhang, Yuqi Huang, Yuankai Liu, Jun Zhang, "Construction of a Hg2+-Sensitive Fluorescent Probe Derived from Rhodamine B," SSRG International Journal of Applied Chemistry, vol. 12,  no. 2, pp. 1-4, 2025. Crossref, https://doi.org/10.14445/23939133/IJAC-V12I2P101

Abstract:

A rhodamine B-based Hg2+-sensitive fluorescent probe P was characterized in H2O-EtOH solution (7:3, v:v, pH 7.0, 2 mM HEPES). Over other tested cations, only the addition of Hg2+ induced the opening of the spiral ring structure of P, and a fluorescence enhancement occurred at 595 nm with a naked eye observed color change from colorless to pink. Using Na2S as a complexing agent, the reversibility of the P-Hg2+ system was proved. The linear range of P for Hg2+ was 9.0×10-6-3.0×10-5 M with a detection limit of 3.0×10-6 M.

Keywords:

Rhodamine B, fluorescent probe, Hg2+, off-on, fluorescent enhancement.

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