A highly selective colorimetric chemodosimeter for fast and quantitative detection of hydrogen sulfide
Abstract
Based on the fact that hydrogen sulfide (H2S) possesses the smallest steric hindrance among C double bond, we designed and synthesized a tricyanoethylene-derived colorimetric chemodosimeter 1 for the fast and highly selective assay of H2S. Chemodosimeter 1 exhibited excellent water-solubility due to the introduction of two hydrophilic hydroxyl groups. Upon the addition of Na2S, chemodosimeter 1 showed a fast (complete within 400 s) and robust decrease of the absorption intensity (>97%), accompanied by a color change from red to colorless. Additionally, a linear relationship between absorption intensity and the added Na2S concentrations (0–130 μM) was observed in aqueous