A rapid response colorimetric and ratiometric fluorescent sensor for detecting fluoride ion, and its application in real sample analysis

摘要

A novel naphthalimide-based fluorescent sensor, namely NIMS, is designed and synthesized for fluoride ion detection. NIMS undergoes a desilylation reaction upon addition of F- ion, thereby shows a colorimetric/fluorometric dual-channel spectral response, i.e., a huge ratiometric absorption value of 229 nm together with distinct colour change from yellow to blue, and drastically quenched fluorescence as well. Additionally, NIMS shows high selectivity, good sensitivity and rapid response toward F- ion, and could be used in qualitative detection of F- ion in the solid state and quantitative detection F- ion in toothpaste samples. (C) 2016 Published by Elsevier Ltd.