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Carbon Dots Enabling Parts‐Per‐Billion Sensitive and Ultraselective Photoluminescence Lifetime‐Based Sensing of Inorganic Mercury

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dc.abstract.enOne of the UN Sustainable Development Goals is to ensure universal access to clean drinking water. Among the various types of water contaminants, mercury (Hg) is considered to be one of the most dangerous ones. It is mostly its immense toxicity and vast environmental impact that stand out. To tackle the issue of monitoring water quality, a nanosensor based on carbon dots (CDs) is developed, whose surface is functionalized with carboxylic groups. CDs show Hg2+ concentration-dependent photoluminescence (PL) lifetimes along with an ultrahigh sensitivity and selectivity. The selectivity of PL quenching by Hg2+ is rationalized by performing light-induced electron paramagnetic resonance (LEPR) spectroscopy showing significant perturbation of the CD photoexcited state upon Hg2+ binding. The experimental findings are supported by time-dependent density functional theory (TD-DFT) calculations. These unveiled the emergence of a low-lying charge transfer state involving a vacant 6s orbital of Hg2+ stabilized by relativistic effects.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorLanger, Michal
dc.contributor.authorZbořil, Radek
dc.contributor.authorOtyepka, Michal
dc.contributor.authorGuldi, Dirk M.
dc.contributor.authorBakandritsos, Aristides
dc.contributor.authorCadranel, Alejandro
dc.contributor.authorKment, Štěpán
dc.contributor.authorZoppellaro, Giorgio
dc.contributor.authorKalytchuk, Sergii
dc.contributor.authorScheibe, Magdalena
dc.contributor.authorPaloncýová, Markéta
dc.contributor.authorMedveď, Miroslav
dc.contributor.authorBaďura, Zdeněk
dc.contributor.authorŠedajová, Veronika
dc.contributor.authorPanáček, David
dc.contributor.authorZdražil, Lukáš
dc.date.accessioned2024-01-24T19:03:57Z
dc.date.available2024-01-24T19:03:57Z
dc.date.issued2023
dc.description.financePublikacja bezkosztowa
dc.identifier.doi10.1002/ADOM.202300750
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/102720
dc.identifier.weblinkhttps://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202300750
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofAdvanced Optical Materials
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleCarbon Dots Enabling Parts‐Per‐Billion Sensitive and Ultraselective Photoluminescence Lifetime‐Based Sensing of Inorganic Mercury
dc.typeJournalArticle
dspace.entity.typePublication