A BODIPY-functionalized bimetallic probe for sensitive and selective color-fluorometric chemosensing of Hg2+

Abstract

A new BODIPY dye conjugate has demonstrated selective quenching by mercury over other metal ions. Coupling of this probe to Au-Fe(3)O(4) nanoparticles as well as platinum electrodes offered sensitive systems for suspension and surface based sensing, respectively.

Fluorescent nanoprobes for sensing and imaging of metal ions: Recent advances and future perspectives

“…This sensing can be achieved by linking a fluorophore probe with a target recognition molecule conjugated to the AuNP. Following this principle, AuNPs have been successfully used to construct fluorophore and quencher-based biosensors for a broad range of metal ions [75]. …”

CdS quantum dots immobilized on calcium alginate microbeads for rapid and selective detection of Hg2+ ions

“…The selectivity for Hg 2+ ion towards uorescence quenching of CdS@CA over other metal ions can be attributed to relatively greater affinity of Hg 2+ ions with sulphur. 45 Further, the results of uorescence quenching of CA@CdS microbeads treated with 1 mg L À1 of Hg 2+ ions in presence of 1 mM of interfering anions, e.g., CH 3 COO À , Cl À , CO 3 2À , HCO , the I o /I values were 2-3 folds higher than the batches treated with only respective interfering anions. The application of CA@CdS microbeads was studied for real time Hg 2+ ion sensing by spiking 1 mg L À1 and 0.5 mg L À1 of Hg 2+ ions, respectively in batches of 50 mL test solution comprising of tap water conditioned to pH 6.…”

A PEGylated colorimetric and turn-on fluorescent sensor based on BODIPY for Hg(ii) detection in water

“…[19][20][21][22][23][24] BODIPY and its derivatives have received great attention for the construction of molecular sensors because of their advantageous characteristics including sharp absorption and fluorescence bands, high extinction coefficients, high fluorescence quantum yields, and high stability against light and chemical reactions. Several of the molecular probes on some supports to improve their water-solubility, for example, inorganic nanoparticles, [33][34][35][36] micelles, [37][38][39] polymers, [40][41][42][43] and so on. [28][29][30][31] For example, the styryl-substituted BODIPY could effectively induce a red shift of the absorption and emission maxima.…”

“…Nowadays, fabricating water-soluble chemosensors has received much attention, due to the practical applications of the probes in environmental and biological realms. Several elegant strategies have been developed for the immobilization of the molecular probes on some supports to improve their water-solubility, for example, inorganic nanoparticles, [33][34][35][36] micelles, [37][38][39] polymers, [40][41][42][43] and so on. Liu et al prepared a type of responsive double hydrophilic block copolymer PEO-b-P(NIPAM-co-RhBHA) as a multifunctional chemosensor for Hg 2+ ions, pH, and temperature, using RAFT polymerization.…”