Benzimidazole based ratiometric and colourimetric chemosensor for Ni(II).
A highly sensitive and selective benzimidazole based colourimetric chemosensor (HL) for the efficient detection of Ni(2+) has been reported. The synthesized chemosensor HL is highly efficient in detecting Ni(2+) over other metal ions that commonly coexist with Ni(2+) in physiological and environmental samples. HL also shows distinct color change from orange yellow to blue visible under the naked eye due to specific binding with Ni(2+). This color change corresponds to a large red shift of the UV-Vis spectrum from 403 nm to 600 nm with a distinct isosbestic point at around 500 nm. The cation sensing property of the receptor HL has been examined by UV-Vis spectroscopy. Electronic structure of the HL-Ni(2+) complex and sensing mechanism has been interpreted by DFT and TDDFT calculations.
Department of Chemistry, Jadavpur University, Kolkata 700032, India.
Deblina
D
Sarkar
Department of Chemistry, Jadavpur University, Kolkata 700032, India.
Ajoy Kumar
AK
Pramanik
Department of Chemistry, Jadavpur University, Kolkata 700032, India. Electronic address: tkmondal@chemistry.jdvu.ac.in.
Tapan Kumar
TK
Mondal
D001562:Benzimidazoles / Q000138:chemical synthesis / Q000737:chemistry*; D003124:Colorimetry / Q000295:instrumentation* / Q000379:methods*; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004583:Electrons; D006863:Hydrogen-Ion Concentration; D007477:Ions; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008958:Models, Molecular; D009532:Nickel / Q000032:analysis*; D011789:Quantum Theory; D012996:Solutions; D012997:Solvents; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics
D001562:Benzimidazoles; D007477:Ions; D012996:Solutions; D012997:Solvents; D009532:Nickel; C031000:benzimidazole; D004121:Dimethyl Sulfoxide
Benzimidazole based chemosensor for Ni(2+); Colourimetric sensor; DFT calculation; Spectral characterization