Pyrrole‐coupled salicylimine‐based fluorescence “turn on” probe for highly selective recognition of Zn²⁺ ions in mixed aqueous media: Application in living cell imaging

Abstract

Cation sensing behaviour of a pyrrole-based derivative (2-hydroxyl 3 methyl 6 isopropyl benzaldehyde}-3,4-dimethyl-1H-pyrrole-2-carbohydrazide (receptor 3) has been explored and is found to be selective towards Zn(2+) over a variety of tested cations. The receptor 3 has shown high selectivity and sensitivity towards Zn(2+) over the other alkali, alkaline earth and transition metal ions. In the presence of Zn(2+), absorption band of receptor 3 has shown the red shift. The sensing behaviour has been suggested to continue via enhancement process which has further been supported by UV-vis absorption and theoretical density functional theory (DFT) calculations indicating the formation of a 1:1 complex between the pyrrole based receptor 3 and Zn(2+). The present work is presenting a highly selective dual channel colorimetric sensor for zinc with great sensitivity. The developed sensor was successfully applied to image intracellular Zn(2+) in living cells.

Fluorescence Chemosensor for HSO4 − Ion Based on Pyrrole-Substituted Salicylimine Zn2+ Complex: Nanomolar Detection

“…HR-MS measurement of an acetonitrile solution of the obtained residue showed peak at m/z 445.117, [Ligand + Zn 2+ ].2Cl − corresponding to a mononuclear complex composed of Ligand/ Zn = 1:1. IR spectrum of the zinc complex indicated the structural information, in which the hydroxyl groups take part in the complexation with zinc since the band responsible for hydroxyl protons become broad and all data and spectra were reported in our previous paper [22]. Thus, the zinc complex has plenty of proton donating groups; which work in synergistic way to accommodate the anion.…”

“…The product was redissolved in ethanol for recrystallization and then dried to give a pure product. A white powder, yield: 48 %; mp: 216-218°C [22].…”

“…The precipitation was collect by filtration at room temperature and dried in vacuum. Further it was washed with water then ethanol followed by petroleum ether [22]. …”

Adsorption of Magenta Dye on PbO Doped MgZnO: Interpretation of Statistical Physics Parameters Using Double-Layer Models

“…In the last few years, we have synthesized metal ion sensors and fabricated a few metal oxides to solve some environmental issues like water pollution, alternative for fuels and energy, etcetera [32][33][34][35][36][37][38][39][40][41][42][43]. In the current article, we synthesized PbO@MgZnO and used it for the adsorption of MD dye.…”