Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Naked-Eye Visible Colorimetric and Ratiometric Chemosensor Based on Schiff Base for Fluoride Anion Detection

Version 1 : Received: 7 December 2020 / Approved: 7 December 2020 / Online: 7 December 2020 (13:09:20 CET)

How to cite: Yang, L.; Liu, Y.; Liu, C.; Fu, Y.; Ye, F. A Naked-Eye Visible Colorimetric and Ratiometric Chemosensor Based on Schiff Base for Fluoride Anion Detection. Preprints 2020, 2020120155 (doi: 10.20944/preprints202012.0155.v1). Yang, L.; Liu, Y.; Liu, C.; Fu, Y.; Ye, F. A Naked-Eye Visible Colorimetric and Ratiometric Chemosensor Based on Schiff Base for Fluoride Anion Detection. Preprints 2020, 2020120155 (doi: 10.20944/preprints202012.0155.v1).

Abstract

A dual-platform colorimetric and ratiometric chemosensor, namely 6-(2-hydroxynaphthalen)-N-n-butyl-naphthalimide (HNA), based on Schiff base constructed from N-n-butyl-4-amino-1,8-naphthalimide and 2-hydroxy-1-naphthaldehyde has been designed and fabricated for detecting fluoride anion (F−) in DMSO solution. HNA is a colorimetic and ratiometric probe with superior selectivity and sensitivity. The color changes of HNA from yellow to purple was observed by the naked eyes in the presence of F−. The absorbance in the UV-Vis spectra of HNA was decreasing in 422 nm, while gradually increasing in 583 nm by adding F−. The limit of detection (LOD) of HNA for detecting F− is low to 0.61 μM and the binding model of HNA and F− is in 3:2 stoichiometry. Meanwhile, HNA can be used to detect F− in real samples. Finally, the mechanism of HNA for the detection of F− was investigated. The present work indicated that HNA would be a superior potential chemosensor in monitoring F− selectively and sensitively.

Subject Areas

Colorimetric; Ratiometric; Chemosensor; Fluoride anion detection; Naked-eye visible

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