Dual-binding pyridine and rhodamine B conjugate derivatives as fluorescent chemosensors for ferric ions in aqueous media and living cells

Abstract

Two new pyridine-type rhodamine B chemosensors (RBPO and RBPF) used to detect Fe3+ have been designed and synthesized, and the sensing behavior towards various metal ions was evaluated via UV–vis and fluorescence spectroscopic techniques.

Recent Advances on Iron(III) Selective Fluorescent Probes with Possible Applications in Bioimaging

“…The furan-2-carbonyl chloride modified rhodamine B derivative 36 selectively forms a complex with Fe 3+ in 1:1 ratio and shows significant fluorescence enhancement at 582 nm that allows to detect Fe 3+ down to 0.437 μM [44]. The pyridine-type rhodamine B fluorescent probes 37 and 38 are developed to detect Fe 3+ down to 0.067 μM and 0.345 μM, respectively [45]. Its analytical applicability has been tested by monitoring Fe 3+ concentrations in various real water samples and live cells.…”

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe2+ ions

“…This process severely interrupts the conjugation of space between O/N atoms or heterocycles, thereby quenching the fluorescence of PDPE-TO. 54–60…”

“…This process severely interrupts the conjugation of space between O/N atoms or heterocycles, thereby quenching the fluorescence of PDPE-TO. [54][55][56][57][58][59][60] In our experiments, we also investigated the nature of PDPE-TO fluorescence quenching by Fe 2+ ions using timeresolved fluorescence spectroscopy. Fig.…”

A New Fluorescent Sensor for Fe3+ Based on Glycoluril Molecular Clip

“…From Figure b, the maximum value of absorption of clip 1 ‐Fe 3+ appeared at 0.5268, which indicated that the stoichiometric ratio of the clip 1 ‐Fe 3+ is 1 : 1. The association constant was estimated to be 3.63×10 3 M −1 according to Benesi‐Hildebrand Formula (see supporting information): …”