Surfactant-sensitized ratiometric fluorescent chemodosimeter for the highly selective detection of mercury(ii) ions based on vinyl ether oxymercuration

Abstract

The ratiometric fluorescence chemodosimeter N-butyl-4-(prop-1-en-1-yloxy)-1,8-naphthalic anhydride (NT-VE) was designed for Hg 2+ recognition by oxymercuration at ambient temperature with high selectivity and no interference from other metal cations such as Cu 2+ , Ag + , Au 3+ , Fe 3+ , etc. The NT-VE could be incorporated into sodium dodecyl-benzenesulfonate (SDBS) micelles, which was confirmed by the clear emission enhancement observed in 0.1 mM SDBS. The hydrophobic core of the SDBS enhanced the solubility of NT-VE, enabling the detection of Hg 2+ in aqueous solution, and the negatively charged micelle surface increased the local concentration of Hg 2+ for amplified sensitivity. This work demonstrated the excellent performance of the NT-VE chemodosimeter for ratiometric detection of Hg 2+ in aqueous solution. The NT-VE/SDBS system could detect Hg 2+ over a linear range of 0.05-10 mM and a detection limit of 9 ppb (45 nM) in water.

Zinc(II) Ion Sensing in Aqueous Micellar Solution Using Modified Bipyridine‐Based “Turn‐On” Fluorescent Probes and its Application in Bioimaging

“…Micelles are highly co‐operative, organized and dynamic molecular assemblies. Moreover, micelles can improve the solubility of hydrophobic sensors in aqueous solution, as they present both a hydrophobic core environment and a polar or ionic surface, ensuring the sensing study can be carried out in water . Herein, we present our work on Zn 2+ sensing by PPQ and [6‐(3 H ‐pyrrolo[2,3‐ c ]quinolin‐4‐yl)pyridin‐2‐yl]methanol (PPQ‐OH) in different micellar aqueous media.…”

“…Moreover,m icelles can improve the solubility of hydrophobic sensors in aqueous solution, as they presentboth ah ydrophobic core environmenta nd ap olar or ionic surface, ensuring the sensing study can be carriedo ut in water. [23,24] Herein, we present our work on Zn 2 + sensing by PPQ and [6-(3H-pyrrolo[2,3-c]quinolin-4-yl)pyridin-2-yl]methanol (PPQ-OH) in different micellar aqueous media. Whereas the ligands showed selectives ensing behavior in anionic sodiumd odecyl sulfate (SDS) and nonionic Tween 80, they did not show significant Zn 2 + sensing in cationic cetyltrimethylammonium bromide (CTAB)-containing medium.…”

Functionalizable red emitting calcium sensor bearing a 1,4-triazole chelating moiety

“…Interestingly, 7 displayed a quite signicant uorescence enhancement in presence of Hg 2+ with a DF/F 0 of 17 fold. This could be explained by an oxymercuration 21,22 reaction of the alkyne moiety of 7 leading to a stabilised organomercury complex (Scheme 3).…”

Triphenylphosphine-assisted highly sensitive fluorescent chemosensor for ratiometric detection of palladium in solution and living cells

“…The N-butyl-4-chloro-1,8-naphthalimide was synthesized according to our previous work. 49 All other materials were purchased from commercial suppliers and used without further purication. Silica gel (200-300 mesh, Qingdao Haiyang Chemical Co.) was used for column chromatography.…”