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Título

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

AutorSchiller, Jana; Pérez-Ruiz, Raúl; Sampedro, Diego; Marqués-López, Eugenia ; Herrera, Raquel P.; Díaz Díaz, David
Palabras claveFluoride
Charge-transfer complex
Fluorescence spectroscopy
Absorption spectroscopy
Association constant
Anion recognition
Sensor
N,N′-disubstituted urea
Fecha de publicación2016
EditorMultidisciplinary Digital Publishing Institute
CitaciónSensors 16(5): 658 (2016)
ResumenIn 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.
Versión del editorhttps://doi.org/10.3390/s16050658
URIhttp://hdl.handle.net/10261/154873
DOI10.3390/s16050658
Identificadoresdoi: 10.3390/s16050658
issn: 1424-8220
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