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Fluoride Anion Recognition by a Multifunctional Urea Derivative: An Experimental and Theoretical Study.

ABSTRACT: In this work we demonstrate the ability of a multifaceted N,N'-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 ¹H-NMR studies and theoretical calculations. Moreover, the recovery of the sensor was achieved by addition of methanol.

SUBMITTER: Schiller J

PROVIDER: S-EPMC4883349 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature

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Fluoride Anion Recognition by a Multifunctional Urea Derivative: An Experimental and Theoretical Study.

Schiller Jana J Pérez-Ruiz Raúl R Sampedro Diego D Marqués-López Eugenia E Herrera Raquel P RP Díaz Díaz David D

Sensors (Basel, Switzerland) 20160509 5

In this work we demonstrate the ability of a multifaceted N,N'-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 natur ...[more]

PMID: 27171087

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