A novel fluorometric chemosensor based on imidazo[4,5-b]phenazine-2-thione for ultrasensitive detection and separation of Hg2+ in aqueous solution
- 1 April 2022
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 100 (4), 280-284
- https://doi.org/10.1139/cjc-2021-0244
Abstract
We synthesize and develop 1,3-dihydro-2H-imidazo[4,5-b]phenazine-2-thione as a ratiometric chemosensor for recognition of Hg2+ in DMSO/H2O (v/v = 9:1) binary solution. We rationally introduce the phenazine imidazole group as fluorophore and the thione moiety as recognition site to bind Hg2+. Interestingly, the chemosensor shows ultrasensitive response for Hg2+ and the lowest limit of detection is 0.167 nM. In addition, it can also separate Hg2+ from aqueous solution with excellent ingestion capacity, and the adsorption ratio is up to 96%. Furthermore, ion test strips based on the chemosensor are fabricated to conveniently and efficiently detect Hg2+.Keywords
This publication has 42 references indexed in Scilit:
- Highly selective fluorescent sensing for CN− in water: utilization of the supramolecular self-assemblyChemical Communications, 2013
- Viologen-Mediated Assembly of and Sensing with Carboxylatopillar[5]arene-Modified Gold NanoparticlesJournal of the American Chemical Society, 2012
- Ratiometric optical oxygen sensing: a review in respect of material designThe Analyst, 2012
- Determination of mercury(II) by surface-enhanced Raman scattering spectroscopy based on thiol-functionalized silver nanoparticlesMicrochimica Acta, 2012
- Highly selective SERS probe for Hg(ii) detection using tryptophan-protected popcorn shaped gold nanoparticlesChemical Communications, 2011
- Methods for the determination and speciation of mercury in natural waters—A reviewAnalytica Chimica Acta, 2010
- Highly selective and ultrasensitive detection ofHg2+ based on fluorescence quenching of Au nanoclusters by Hg2+–Au+ interactionsChemical Communications, 2009
- A Novel Design Method of Ratiometric Fluorescent Probes Based on Fluorescence Resonance Energy Transfer Switching by Spectral Overlap IntegralChemistry – A European Journal, 2003
- Determination of mercury in saliva with a flow-injection systemAnalytica Chimica Acta, 1996
- Recommendations for the definition, estimation and use of the detection limitThe Analyst, 1987