An Effective Selenium-Based Fluorescence Chemosensor for Selective Recognition of Hg2+ in Aqueous Medium: Experimental and Theoretical Studies

Abstract

We introduce a novel selenium-based compound [N-(Phenylcarbamoselenoyl) furan-2-carboxamide] for the optical and uorimetric detection of Hg in an aqueous medium. The synthesized compound was characterized by different spectroscopic methods. The designed chemosensor FSU has shown a signi cant uorescence quenching when Hg 2+ ions were added to the sensing medium. Furthermore, Hg 2+ ions provoked a 2:1 complex formation with the chemosensor FSU. It is found that the compound offers high selectivity over a variety of cations such as Co

Pilot Study on the Visualization of Latent Fingerprints and Naked Eye Detection of Hg2+ and Zn2+ Ions in Aqueous Media Using Ninhydrin-Based Thiosemicarbazone

“…The UV–vis titration curve, as seen in Figure , further supported the 1:1 stoichiometry of the complexes. The Benesi–Hildebrand plot (Figure S10B) was used to compute the association constant ( K a ), which was discovered to be 2.5 × 10 5 and 3.082 × 10 4 M –1 for Hg 2+ and Zn 2+ , respectively . This outcome demonstrated a robust interaction between the sensor NHPyTSC toward Hg 2+ and Zn 2+ ions.…”

“…The Benesi−Hildebrand plot (Figure S10B) was used to compute the association constant (K a ), which was discovered to be 2.5 × 10 5 and 3.082 × 10 4 M −1 for Hg 2+ and Zn 2+ , respectively. 33 This outcome demonstrated a robust interaction between the sensor NHPyTSC toward Hg 2+ and Zn 2+ ions. Using equation 3σ/K and the linear curve of the absorption data, the limit of detection of the sensor NHPyTSC was calculated.…”

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

“…It presents an excellent positive linear relationship with the concentration of Hg 2+ at 480 nm, with a detection limit as low as 2.05 × 10 −7 M. Moreover, the researchers extended the use of the probe in real water samples and prepared test strips. A novel selenium-based compound probe, FSU, based on N-(phenylcarbamoselenoyl) furan-2-carboxamide, was presented for the optical and fluorimetric detection of Hg [135]. The sensor is able to recognize Hg 2+ in the DMSO/H 2 O (95:5, v/v) system, indicating a fluorescence burst with a detection limit of 7.35 × 10 −7 M, in which selenium behaves as a magnet for mercury based on ICT.…”

A new pyridine-dicarbohydrazide-based turn-off fluorescent and colorimetric chemosensor for selective recognition of Cu2+

“…These sensors operate based on light-controlled molecular data processing, which involves molecular modi cations and intramolecular interactions generated by light, photons, various solvents, pHs, and metal ion complexes, as well as simple molecular structure adjustment and tuning. Fast reaction, portability, ease of use, excellent selectivity and sensitivity, and detection with the naked eye are all made possible by these qualities for medical, biological, and environmental applications [19][20][21][22][23][24][25]. Dipicolinic acid (DPA) has been proposed as a useful chemical scaffold for developing chromogenic and uorescent sensors, particularly metal ion detection [26][27][28][29][30][31][32].…”