Novel fluorescent coumarin-thiazole based sensors for selective determination of cyanide in aqueous media

Kandemir E., ÖZKÜTÜK M., AYDINER B., SEFEROĞLU N., ERER H., SEFEROĞLU Z.

Journal of Molecular Structure, cilt.1249, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1249
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.molstruc.2021.131593
  • Dergi Adı: Journal of Molecular Structure
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chimica, Compendex, INSPEC
  • Anahtar Kelimeler: Coumarin, Thiazole, X-ray, Anion detection, Cyanide detection, DFT calculations, PHOTOPHYSICAL PROPERTIES, CHEMOSENSOR, FLUORIDE, ION, PROBE, RECOGNITION, DERIVATIVES, COMPLEXES, ENERGY, ACID
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

© 2021 Elsevier B.V.Novel colorimetric and fluorimetric fluorescent coumarin-thizole based chemosensors 4a-b were synthesized and characterized using spectroscopic methods. The photophysical properties of the sensors were determined in six solvents by UV–Vis and fluorosence spectrometers. The sensitivity and selectivity of 4a-b towards anions were investigated by absorption, emission and naked-eye detection methods in organic and aqueous media. Both sensors 4a-b showed selectivity to detecting of CN− besides other interference anions (F−, AcO− and H2PO4−) in aqueous solution. The sensing mechanism of the sensors were investigated by reversibility and 1H NMR titration studies and also supported by DFT calculations. Moreover, LOD values of 4a-b were calculated and the results can be used to detect CN− at a concentration lower than the WHO guideline (2.7 mM) for cyanide. Thermal studies of the compounds have shown that the 4a-b have enough thermal stability properties for application as optic dye. The compound 4b was fully spectroscopically characterized and its structure was unambiguously determined by single crystal X-ray crystallography.