Cu²⁺‐selective naked‐eye ‘off–on' fluorescent probe with multisignals: chromaticity, fluorescence, electrochemistry

Abstract

In this study, a rhodamine-acetylferrocene conjugate of RBFc was synthesized and then characterized using spectroscopy and single-crystal analysis. The chemosensor RBFc exhibited a marked colour change from colourless to pink after binding to Cu 2+ ions. Importantly, under the presence of the other competing cations in aqueous solution, only Cu 2+ ions caused spirolactam ring opening in rhodamine B in RBFc, resulting in an enhanced absorbance of ultraviolet light spectra and fluorescence spectra, as well as obvious shifts in cyclic voltammetry curves and differential pulsed voltammetry curves. The novel probe described in this manuscript provides an attractive approach for detecting Cu 2+ in the presence of other multisignals.

SDS‐capped 1‐pyrenecarboxaldehyde nanoprobe for selective detection of Cu2+ ion from water samples: Spectroscopic approach

“…According to the World Health Organization and United States Environmental Protection Agency, the tolerable intake limit for Cu 2+ ions in the human body is 1.3 μg/ml [9, 10]. However, high concentrations of copper can result in serious illness due to damage to the liver and kidney [11] and may cause conditions such as Alzheimer’s disease [12], Wilson’s disease [13], Parkinson's disease [14], prions disease [15] and diabetes [16]. Other health threats, such as Indian childhood cirrhosis and idiopathic copper toxicosis, have been reported due to the overloading of copper in children [17].…”