AUTHOR=Sun Xue-Jiao , Liu Ting-Ting , Fu Hong , Li Na-Na , Xing Zhi-Yong , Yang Fan 

TITLE=A Naphthalimide-Based Fluorescence “Off-on-Off” Chemosensor for Relay Detection of Al3+ and ClO−

JOURNAL=Frontiers in Chemistry

VOLUME=7

YEAR=2019

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2019.00549

DOI=10.3389/fchem.2019.00549

ISSN=2296-2646

ABSTRACT=<p>A novel Al<sup>3+</sup> chemosensor <bold>NPA</bold> was designed and synthesized on basis of the mechanism of ICT and CHEF. Upon addition of Al<sup>3+</sup>, the probe <bold>NPA</bold> displayed a bright green fluorescence under UV radiation and visual color change from yellow to colorless. Spectrum titrations showed that <bold>NPA</bold> could be recognized as a fluorescent turn-on probe with 10<sup>−8</sup> M detection level. The probe was successfully applied in real water sample and test paper. More important, <bold>NPA</bold>-Al<sup>3+</sup> complex were used as a fluorescent turn-off probe for the detection of ClO<sup>−</sup> with the detection as low as 2.34 × 10<sup>−8</sup> M. The performance of <bold>NPA</bold> to Al<sup>3+</sup> and <bold>NPA</bold>-Al<sup>3+</sup> complex to ClO<sup>−</sup> demonstrated that <bold>NPA</bold> could be served as a sensitive probe and exhibit INHIBIT logic gate behavior with Al<sup>3+</sup> and ClO<sup>−</sup> as inputs.</p>