A Turn-on Fluorescent Sensor For Cadmium Ion Detection In Aqueous Solutions

Year 2020, Volume: 7 Issue: 1, 277 - 286, 15.02.2020

Ziya Aydın

https://doi.org/10.18596/jotcsa.638912

Cited By: 2

Abstract

Fluorescent sensors have attracted an important
interest due to their advantages such as high selectivity, rapid response, easy
to use etc.  In this study, a rhodamine based
fluorescent sensor, RhDP, was synthesized, and used for selective detection of Cd²⁺
ions. The sensor responds to Cd²⁺ via the coordination induced
fluorescence activation (CIFA) mechanism. RhDP gives a very fast and reversible
fluorescence response to Cd²⁺ in the presence of the metal ions tested.
The complex stoichiometry between RhDP and Cd²⁺ was found to
be 1:1 and the binding constant was calculated as 2.70 × 10⁷ M^-1in ACN/HEPES buffer (10 mM,
pH: 7.05, v/v 1:1). The fluorescent detection limit of RhDP for Cd²⁺
was found to be 0.218 µM, which gave a marked sensitivity towards Cd²⁺.

Keywords

Fluorescent, Sensor, Cadmium, Rhodamine B

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