| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1228933 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2016 | 6 Pages |
•Pyridyl based chemosensor has been synthesized.•Spectral characterization of the chemosensor has been carried out.•Colorimetric and naked eye detection of nickel(II) has been carried out over other metal ions.•Electronic structure of chemosensor and its nickel(II) complex have been interpreted by DFT computations.
A highly sensitive and selective pyridyl based colorimetric chemosensor (H2L) for the efficient detection of Ni2 + has been reported. The synthesized chemosensor H2L is highly efficient in detecting Ni2 + even in the presence of other metal ions that commonly co-exist with Ni2 +. H2L also shows distinct color change from green to deep red visible under naked eye due to specific binding with Ni2 +. This color change is due to formation of a new band at 510 nm upon gradual addition of Ni2 +. The association constant has been found to be 1.27 × 105 M− 1 with limit of detection (LOD) of 8.3 × 10− 7 M. Electronic structure of the H2L–Ni2 + complex and sensing mechanism have been interpreted theoretically by DFT and TDDFT calculations.
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