Dithizone as novel and efficient chromogenic probe for cyanide detection in aqueous media through nucleophilic addition into diazenylthione moiety.
A new selective chemodosimeter probe was developed by the introduction of dithizone (DTZ) as a simple and available dye for detection of cyanide in aqueous media which enables recognition of cyanide over other competing anions such as acetate, dihydrogen phosphate, fluoride and benzoate through covalent bonding. The sensing properties of DTZ were investigated in DMSO/H2O (1:9) and have demonstrated a very high selectivity toward the cyanide anions. A reasonable recognition mechanism was suggested using UV-Vis, (1)H NMR and FTIR spectroscopy techniques. Time dependent density function theory (TDDFT) computations of UV-Vis excitation for DTZ2-CN adduct agreed well with our experimental findings. The detection limit of the new chromogenic probe was measured to be 0.48 μmol L(-1) which is much lower than most recently reported chromogenic probes for cyanide determination. The analytical utility of the method for the analysis of cyanide ions in electroplating wastewater (EPWW), human serum, tap and mineral water samples was demonstrated and the results were compared successfully with the conventional reference method. The short time response and the detection by the naked eye make the method available for the detection and quantitative determination of cyanide in a variety of real samples.
Department of Chemistry, Payame Noor University, 71955-1368 Shiraz, Islamic Republic of Iran. Electronic address: Tavallali@yahoo.com.
Hossein
H
Tavallali
Department of Chemistry, Payame Noor University, 71955-1368 Shiraz, Islamic Republic of Iran.
Gohar
G
Deilamy-Rad
Department of Chemistry, Payame Noor University, 71955-1368 Shiraz, Islamic Republic of Iran.
Abolfath
A
Parhami
Department of Chemistry, Payame Noor University, 71955-1368 Shiraz, Islamic Republic of Iran.
Sajede
S
Kiyani
D000042:Absorption; D000838:Anions; D002863:Chromogenic Compounds / Q000737:chemistry*; D003486:Cyanides / Q000032:analysis* / Q000097:blood; D004121:Dimethyl Sulfoxide; D004230:Dithizone / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D011789:Quantum Theory; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013871:Thiones / Q000737:chemistry*; D017186:Titrimetry; D014867:Water / Q000737:chemistry*
D000838:Anions; D002863:Chromogenic Compounds; D003486:Cyanides; D013871:Thiones; D014867:Water; D004230:Dithizone; D004121:Dimethyl Sulfoxide
Chromogenic chemosensor; Cyanide sensing; Dithizone; Naked-eye recognition; Nucleophilic addition; UV–Vis spectra