A new 1,8-naphthalimide-based colorimetric and "turn-on" fluorescent Hg2+ sensor.

A new fluorescent molecule 4-(bis(2-(ethylthio)ethyl)amino)-N-n-butyl-1,8-naphthalimide (BTABN) was reported. Its UV-vis absorption and fluorescence spectra were almost not dependent on the pH, but remarkably and selectively affected by Hg(2+). Upon the addition of Hg(2+) in EtOH/H(2)O (1/2,v/v), the absorption wavelength maxima were blueshifted from 436 nm… CONTINUE READING