A new rhodamine-based chemosensor for turn-on fluorescent detection of Fe3+

Xiang Han; Dong-En Wang; Sheng Chen; Longlong Zhang; Yadan Guo; Jinyi Wang

doi:10.1039/C5AY00568J

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A new rhodamine-based chemosensor for turn-on fluorescent detection of Fe³⁺†

Xiang Han,^a Dong-En Wang,^a Sheng Chen,^a Longlong Zhang,^a Yadan Guo^a and Jinyi Wang*^a

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* Corresponding authors

^a College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China
E-mail: jywang@nwsuaf.edu.cn
Fax: +86-298-708-2520
Tel: +86-298-708-2520

Abstract

A new fluorescent probe RH-Fe based on rhodamine B lactam was developed as a colorimetric and fluorescent chemosensor for Fe³⁺. The optical feature of RH-Fe for Fe³⁺ was investigated using UV-vis absorption and fluorescence emission spectroscopy. Upon the addition of Fe³⁺, the RH-Fe displayed a distinct color change from colorless to pink and a significant fluorescence enhancement, which can be directly detected by the naked eye. The stoichiometry of RH-Fe to Fe³⁺ complex was found to be 1 : 1 and the detection limit was determined to be as low as 0.27 μM. The results suggest that the RH-Fe probe may provide a convenient method for the visual detection of Fe³⁺ with high sensitivity.

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Article information

DOI: https://doi.org/10.1039/C5AY00568J
Article type: Paper
Submitted: 04 Mar 2015
Accepted: 08 Apr 2015
First published: 08 Apr 2015

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Anal. Methods, 2015,7, 4231-4236

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A new rhodamine-based chemosensor for turn-on fluorescent detection of Fe³⁺

X. Han, D. Wang, S. Chen, L. Zhang, Y. Guo and J. Wang, Anal. Methods, 2015, 7, 4231 DOI: 10.1039/C5AY00568J

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Analytical Methods