| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1230900 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2014 | 4 Pages |
•Dye 1 was synthesized and its cation sensing properties were investigated.•The dye 1 exhibited high selectivity for Hg2+ as compared with other cations.•Dye 1-F− complex also could be recovered by adding Hg2+.
A (E)-2-(2-(2-(1H-indol-3-yl)vinyl)-4H-chromen-4-ylidene)malononitrile (dye 1) was synthesized and its cation sensing properties in DMSO were investigated by UV–vis spectroscopy. Upon the addition of Hg2+, the solution of dye 1 showed color change and the absorption band shows a formation of a 1:1 dye 1-Hg2+ coordination complex. The dye 1 exhibited high selectivity for Hg2+ as compared with other cations. Interestingly, the dye 1-F− complex also could be recovered by adding Hg2+. We have investigated the ability of complex formation based on the association constant, Kass; the binding ability for the complex formation of dye 1-F− and Hg2+ is greater than that of the dye 1 with F−.
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