Metal-coordination driven intramolecular twisting: a turn-on fluorescent-redox probe for Hg²⁺ions through the interaction of ferrocene nonbonding orbitals and dibenzylidenehydrazine

Abstract

A unique C2 symmetric azine bridged bi-ferrocenyl receptor has been designed and synthesized for the selective detection of Hg2+ ion with a low detection limit as 15 nM via turn on fluorescence with a blue shift.

Strategic design of a 2,6-disubstituted pyridine-based probe having hard-soft centers: responsive divergence from one core

“…The EPR spectra for both the hostguest complexes have shown similar hyperfine splitting patterns with g > = 2.08, which gives evidence for the presence of a Cu-N bond. 46 The spectrum is significantly broadened owing to the underlying 14 N superhyperfine couplings from the pyridine ligand, Also, here, g 8 4 g > , as can be seen from the spectral pattern, which indicates the presence of Cu(II) in the system (Fig. 9 and Fig.…”

“…[10][11][12] The Hg 2+ ion is known to have a high affinity towards the alkyne functionality, and therefore it is anticipated to serve as a potential interactive unit towards any kind of alkyne, but the nature of such interactions in different alkynes with similar surroundings of probes has not been explored yet. The Hg 2+ ion is also well-known to bind with hard donors like N and O atoms; [13][14][15][16][17] however, any insight about the nature of interaction of Hg 2+ in the presence of both hard and soft centres, simultaneously in a probe, is rather very rare. 18 This apparent non-transparency in the subject has motivated us to design our molecules in order to have both hard and soft interacting units.…”

Ferrocene-Based Electrochemical Sensors for Cations

“…No Hg 2+ ion sensing ability improvement is obtained with 66 or 67. Receptor 66 can be seen as the dimeric version of 64, and its E m shifts by 0.078 V in the positive direction after adding Hg 2+ [91]. However, the E m of receptor 67 shifts by 0.033 V when exposed to Hg 2+ ions [92].…”

“…However, the E m of receptor 67 shifts by 0.033 V when exposed to Hg 2+ ions [92]. Based on 1 H-NMR titration analysis, it was inferred that the Hg 2+ binds to the triazole ring nitrogen atom and the oxygen atom in the OCH 2 bridging group [91].…”

Highly Efficient Multi‐Tasking Porphyrin‐Based Chemosensor for Mercury Ions

“…When ingested by a pregnant woman, mercury rapidly crosses the placenta and affects the developing fetal brain and central nervous system, which is the cause of developmental delays for children. [4][5][6][7][8][9] When inorganic mercury is introduced to the marine environment-specific bacteria, convert that inorganic mercury to methyl mercury, which enters the food chain and higher organisms, especially in lungs and edible fish. [9][10][11][12][13] Mercury can make a chelate with intracellular electron donors who act as antioxidant proteins and enzyme-like carboxyl, mercapto, and amino, etc.…”