A Spectroscopic and Photochemical Behavior of Some Coumarin Derivatives | ||
| Delta Journal of Science | ||
| Article 6, Volume 38, Issue 2, December 2017, Pages 183-193 PDF (3.36 M) | ||
| Document Type: Research and Reference | ||
| DOI: 10.21608/djs.2017.139448 | ||
| Authors | ||
| Mohamed.Y. El-Sheikh; Saleh. A. Azim; Ali. K. Abou Saif; Ehab. A. Okba | ||
| Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt | ||
| Abstract | ||
| The electronic absorption, emission spectra as well as fluorescence quantum yields of some coumarin derivatives were measured in different solvents of different polarities. pKa and pKa* were calculated using universal buffers. The dyes undergo micellization in different micelles and may be used as a probe to determine the critical micelle concentrations (CMC) of CTAB and SDS. The effect of metal ions like [Cu+2, Co+3, Ni+2] as quenchers and the effect of temperature on quenching are studied and thermodynamic parameters have been calculated. | ||
| Keywords | ||
| fluorescence quantum yield; coumarin derivatives; metal ion quencher | ||
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