A ratiometric near-infrared (NIR) fluorescentprobe L based on chromenylium-cyanine fluorophore with chelate unit NS2O2 for the detection of Hg2+ ions in aqueous media has been prepared. The probe L shows high selectivity for Hg2+ ions with immediately fluorescence intensity increasing at 663 nm and decreasing at 728 nm synchronously via a Hg2+-induced intramolecular charge transfer (ICT) mechanism
Novel styrylbenzothiazolium dye-based sensor for mercury, cyanide and hydroxide ions
作者:Seon-Young Gwon、Boddu Ananda Rao、Hak-Soo Kim、Young-A. Son、Sung-Hoon Kim
DOI:10.1016/j.saa.2015.02.094
日期:2015.6
We report the design and synthesis of a novel styrylbenzothiazolium (3) derivative developed as a fluorescent and colorimetric chemodosimeter with high selectivity toward Hg(2+), CN(-) and OH(-) ions. An obvious loss of pink color in the presence of Hg(2+) and CN(-) ions could make it a suitable "naked eye" indicator. We propose a sensing mechanism whereby the benzenoid form is changed to a quinoid