Rapid Detection of Cd2+ Ions in the Aqueous Medium Using a Highly Sensitive and Selective Turn-On Fluorescent Chemosensor

Abstract

Herein, a novel optical chemosensor, (CM1 = 2, 6-di((E)-benzylidene)-4-methylcyclohexan-1-one), was designed/synthesized and characterized by 1H-NMR and FT-IR spectroscopy. The experimental observations indicated that CM1 is an efficient and selective chemosensor towards Cd2+, even in the presence of other metal ions, such as Mn2+, Cu2+, Co2+, Ce3+, K+, Hg2+,, and Zn2+ in the aqueous medium. The newly synthesized chemosensor, CM1, showed a significant change in the fluorescence emission spectrum upon coordination with Cd2+. The formation of the Cd2+ complex with CM1 was confirmed from the fluorometric response. The 1:2 combination of Cd2+ with CM1 was found optimum for the desired optical properties, which was confirmed through fluorescent titration, Job’s plot, and DFT calculation. Moreover, CM1 showed high sensitivity towards Cd2+ with a very low detection limit (19.25 nM). Additionally, the CM1 was recovered and recycled by the addition of EDTA solution that combines with Cd2+ ion and, hence, frees up the chemosensor.

Recent Progress on Fluorescent Probes in Heavy Metal Determinations for Food Safety: A Review

“…As shown in Figure 20, a novel optical chemosensor, CM 1 (2,6-di((E)-benzylidene)-4-methylcyclohexan-1), was designed to specifically detect Cd 2+ [126]. It works well in…”

“…As shown in Figure 20, a novel optical chemosensor, CM 1 (2,6-di((E)-benzylidene)-4-methylcyclohexan-1), was designed to specifically detect Cd 2+ [126]. It works well in aqueous media, initiates fluorescence turn-on with a detection limit of 19.25 nM, and has been successfully employed in the detection of real water samples.…”

A Highly Promising Flower-Shaped WO2I2/Poly(1H-Pyrrole) Nanocomposite Thin Film as a Potentiometric Sensor for the Detection of Cd2+ Ions in Water

“…The industrial sector traditionally relies on fluorescence or atomic absorption spectrometry techniques for Cd 2+ ion detection. However, due to the substantial cost associated with these methods [17], researchers and scientists have made concerted efforts to introduce electrochemical and potentiometric techniques into industrial applications. Encouraging studies, like our present research, serve as a catalyst for these initiatives, offering opportunities for further exploration in this direction.…”