A Spectroscopic and Photochemical Behavior of Some Coumarin Derivatives | ||||
| Delta Journal of Science | ||||
| Article 6, Volume 38, Issue 2, December 2017, Page 183-193 PDF (3.36 MB) | ||||
| Document Type: Research and Reference | ||||
| DOI: 10.21608/djs.2017.139448 | ||||
 View on SCiNiTO | ||||
| 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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