A new multifunctional 1, 10-phenanthroline based fluorophore for anion and cation sensing

Novel 1,10-phenanthroline - di-2-picolylamine scaffold as a selective chemosensor for copper and cyanide ions

“…The chemosensor 1 was synthesised as previously reported in literature [25] and showed selective response to Cu 2+ only; while remained silent towards other metal ions including Zn 2+ . This selective response of Cu 2+ sensing is different from previously reported phenanthroline dicarboxamides chemosensors, where phenanthroline N′s play major role in the cation binding event [26,27]. The model compound 2 was synthesised to ascertain the non-involvement of phenanthroline N′s, which also showed selectivity towards Cu 2+ ions only, despite being devoid of phenanthroline fluorophore.…”

Optical Chemical Sensing of Iodide Ions: A Comprehensive Review for the Synthetic Strategies of Iodide Sensing Probes, Challenges, and Future Aspects

“…A multi‐purpose fluorophore was prepared by Alreja et al [38] . possessing an amide functionality composed of 1,10‐phenanthroline unit having appropriate coordination sites for sensing of Cu 2+ and Zn 2+ ions in 1 : 2 stoichiometry.…”

“…The mechanisms of fluorescent sensing of anions and cations for novel chemosensors have been explained by various methods such as photoinduced electron transfer (PET), internal charge transfer (ICT), metal-ligand charge transfer (MLCT), Förster resonance energy transfer or fluorescence resonance energy transfer (FRET), excited-state intramolecular proton transfer (ESIPT), and excimer/exciplex formation. [37,38] To prepare an effective sensing probe, it must meet stringent requirements so that it should respond selectively and sensitively in the presence of a complex system.…”

“…The limit of detection of Ag + and I À ions were found to be 2.43 and 5.31 μM, respectively. [71] A multi-purpose fluorophore was prepared by Alreja et al [38] possessing an amide functionality composed of 1,10phenanthroline unit having appropriate coordination sites for sensing of Cu 2 + and Zn 2 + ions in 1 : 2 stoichiometry. Furthermore, various functionalities linked with 1,10-phenanthroline can organize in such a manner that the weakly basic and larger-sized iodide ions formed a complex in a 1 : 1 ratio.…”

Facile Iodine Detection via Fluorescence Quenching of β‐Cyclodextrin:Bimane‐Ditriazole Inclusion Complexes

“…The detection of iodine using supramolecular bimane‐cyclodextrin complexes has not been reported to date, despite the fact that iodine has been shown to interact with organic molecules in general, including both organic fluorophores [18] and cyclodextrin derivatives, [19] and despite the fact that the complex formed between bimane and β‐cyclodextrin has been previously shown to facilitate high performance sensing applications [17] . Reported herein are the results of our successful efforts to realize precisely this objective: the use of a fluorescent complex formed from the novel bimane ditriazole 1 (Figure 1) and β‐cyclodextrin to facilitate the sub‐nanomolar detection of iodine, using both solution‐state supramolecular sensors and paper supports on which the supramolecular sensor has been adsorbed.…”