Thiacalixarene-tetra-(quinoline-8- sulfonate): a Sensitive and Selective Fluorescent Sensor for Co (II)
A novel fluorescent thiacalixarene-tetra-(quinoline-8-sulfonate) (TCTQ8S) was synthesized by condensation of thiacalixarene (TCA) and 8-quinoline sulfonyl chloride(8QSC). TCTQ8S was characterized by ESI-MS, 1H-NMR and 13C-NMR spectroscopic methods. TCTQ8S was found to be an efficient “turn-off” fluorescent sensor for the selective and sensitive recognition of Co(II) ions. The Job’s plot measurement reveals a 1:1 stoichiometric ratio. The designed chemosensor exhibited high selectivity toward Co(II) ions vs. other tested metal ions, with a detection limit of up to 1.038 × 10−9 M. The binding constant and quantum yield for the complex were also determined. Molecular docking studies have been successfully performed to support 1:1 binding of TCTQ8S with the Co(II) metal ion. TCTQ8S was evaluated for real sample analysis on water sample for the detection of Co(II).
KeywordsThiacalixarene 8-quinoline sulfonyl chloride Cobalt (II) Fluorescence quenching Molecular docking
- 10.Agrawal VK, Bano S, Supuran CT, Khadikar PV (2004) QSAR study on carbonic anhydrase inhibitors: aromatic/heterocyclic sulfonamides containing 8-quinoline-sulfonyl moieties, with topical activity as antiglaucoma agents. Eur J Med Chem 39(7):593–600. doi: 10.1016/j.ejmech.2004.03.002 CrossRefPubMedGoogle Scholar
- 11.Meng X, Zhu M, Wang S (2012) Quinoline-based fluorescence sensors. INTECH Open Access PublisherGoogle Scholar
- 21.Lokhande RS, Sharma MR, Pawar RN, Chaudhary AB (2004) Extraction and spectrophotometric: determination of Co(II) with phosphorous containing p-tert-butylthiacalix (4) arene. Chem Environ Res 13(3 & 4):253–258Google Scholar
- 27.Larsen RW, Helms MK, Everett WR, Jameson DM (1999) Ground-and excited-state characterization of an electrostatic complex between Tetrakis-(4-Sulfonatophenyl) porphyrin and 16-Pyrimidinium crown-4. Photochem Photobiol 69(4):429–434Google Scholar