A single nanofluorophore "turn on" probe for highly sensitive visual determination of environmental fluoride ions.

ABSTRACT: Herein, we report a single nanofluorophore "off-on" probe based on the unique fluoride-boron interaction to achieve the visual determination of fluoride ions in environmental water. Red quantum dots (QDs) were modified using 3-aminophenylboronic acid (APBA) to form a stable standard emission probe, and reaction of the probe with catechol formed a five-membered cyclic borate ester, which led to the quenching of the fluorescence emission. The designed nanofluorophore probe showed a turn-on effect in the presence of fluoride ions due to the five-membered cyclic borate ester being transformed into a trifluoroborate, with breakage of the B-O bonds and removal of the catechol from the QDs. The prepared nanofluorophore probe displayed a high sensitivity for the quantification of fluoride ions wit

SUBMITTER: Li Y 

PROVIDER: S-EPMC9082020 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature