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Fluoride anion recognition by a multifunctional urea derivative: An experimental and theoretical study

AuthorsSchiller, Jana; Pérez-Ruiz, Raúl; Sampedro, Diego; Marqués-López, Eugenia ; Herrera, Raquel P.; Díaz Díaz, David
Charge-transfer complex
Fluorescence spectroscopy
Absorption spectroscopy
Association constant
Anion recognition
N,N′-disubstituted urea
Issue Date2016
PublisherMultidisciplinary Digital Publishing Institute
CitationSensors 16(5): 658 (2016)
AbstractIn this work we demonstrate the ability of a multifaceted N,Nʹ-disubstituted urea to selectively recognize fluoride anion (F) among other halides. This additional function is now added to its already reported organocatalytic and organogelator properties. The signaling mechanism relies on the formation of a charge-transfer (CT) complex between the urea-based sensor and F in the ground state with a high association constant as demonstrated by absorption and fluorescence spectroscopy. The nature of the hydrogen bonding interaction between the sensor and F was established by H-NMR studies and theoretical calculations. Moreover, the recovery of the sensor was achieved by addition of methanol.
Publisher version (URL)https://doi.org/10.3390/s16050658
Identifiersdoi: 10.3390/s16050658
issn: 1424-8220
Appears in Collections:(IQAC) Artículos
(ISQCH) Artículos
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