A dinitrophenol-based colorimetric chemosensor sequentially sensing Cu2+ and S2?, HDHT ((E)-2-(2-(2-hydroxy-3,5-dinitrobenzylidene)hydrazineyl)-N,N,N-trimethyl-2-oxoethan-1-aminium), was designed synthesized. The selectively detected through a color change of yellow to colorless. calculated detection limit the for 6.4 × 10?2 ?M. In interference test, not considerably inhibited by various metal ...

The nitrovanillin azine (NA) has been successfully synthesized and examined as a colorimetric chemosensor for sulfide anion detection. NA was using two steps reaction. Vanillin reacted with concentrated nitric acid to form 5-nitrovanillin (NV) then the NV condensed hydrazine hydrate produce NA. obtained fully elucidated by FTIR, 1H-NMR, 13C-NMR, GC-MS spectrometer. activity anionic carried out ...