A Naked Eye and Fluorescence Turn-on Sensor for Smartphone Assisted Solid and Solution Phase Sensing of Highly Toxic Triphosgene

A naked eye and fluorescence turn-on 1,8-naphtahlimide based chemosensor, 1, possessing Schiff base linkage was utilized for the rapid detection of highly toxic triphosgene. The proposed sensor selectively detected triphosgene over various other competitive analytes including phosgene with the detection limit of 6.15 and 1.15 µM measured using UV-vis and fluorescence spectrophotometric techniques, respectively. Colorimetric changes observed in solution phase were processed by image analysis using smartphone leading to on-site and inexpensive determination of triphosgene. Further, solid phase sensing of triphosgene was carried out by 1 loaded PEG membranes and silica gel.