Multi-signaling detection of Hg2+ and Cu2+ by a ferrocene–pyrazole dyad associated with molecular-scale arithmetic

A novel pyrazole biscoumarin based chemosensors for the selective detection of Cu2+ and Zn2+ ions

“…In other words, PBC can sense Zn 2+ in the presence of other competing metal ions except Cu 2+ . Similar type of competing ions selectivity was observed for Cu 2+ and Zn 2+ ions with ferrocene based sensor [36].…”

Synthesis and Charge-Transfer Dynamics in a Ferrocene-Containing Organoboryl aza-BODIPY Donor–Acceptor Triad with Boron as the Hub

“…Emission from 3 was recovered upon oxidation with Fe­(ClO 4 ) 3 , as presented in the bottom of Figure . Recovery of the emission following oxidation of the Fc ligands suggests that emission quenching in the neutral molecule proceeds via charge transfer from the Fc ligand to aza-BODIPY, which is a commonly reported quenching mechanism in Fc-containing compounds. − …”

A Highly Selective Redox, Chromogenic, and Fluorescent Chemosensor for Hg2+ in Aqueous Solution Based on Ferrocene–Glycine Bioconjugates

“…Although several colorimetric, redox-active, and fluorescence-based chemosensors have been extensively investigated for the determination of Hg 2+ ions, certain constraints are encountered; for example, (i) mercuric ion can cause fluorescence quenching of the fluorophores via the spin–orbit coupling effect; thus, most of the probes were designed based on fluorescence quenching; − (ii) many of the sensors contain hydrophobic fluorophores that demand the addition of organic cosolvents to increase their solubility in aqueous media . Therefore, searching for Hg 2+ probes based on fluorescence enhancement, which is more sensitive than fluorescence quenching, is still an active field in analytical chemistry. − Here in this article, we demonstrate the synthesis, characterization, optical, and electrochemical properties of two new ferrocene–glycine bioconjugates, 2 and 3 , that selectively detect Hg 2+ ions in aqueous solution.…”