Spectral behavior study of 3-(4-dimethylamino-phenyl)-1-{6-[3-(4-dimethylamino-phenyl)-acryloyl]-pyridin-2-yl}-propanone |
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| Authors: | M Gaber YS El-Sayed H Diab |
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| Institution: | 1. Laboratory for Medical Microbiology, PAMM Laboratories, Veldhoven, the Netherlands;2. Department of Medical Microbiology and Infectious Diseases, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, the Netherlands;3. River Diagnostics BV, University Medical Centre Rotterdam, Rotterdam, the Netherlands;4. Department of Dermatology, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, the Netherlands;1. Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation;2. N. M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russian Federation;3. Department of Chemistry, University of Southern California, Los Angeles, 90089-0482 CA, USA;1. Plant Pathology Department, Citrus Research and Education Center, IFAS, University of Florida, Lake Alfred, Florida, USA;2. Department of Agricultural Botany, Faculty of Agriculture, Tanta University, Tanta, Egypt |
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| Abstract: | The photophysical properties such as singlet absorption, molar absorptivity, fluorescence spectra, fluorescence quantum yield (?f) and transition dipole moment (μ12) of 3-(4-dimethylamino-phenyl)-1-{6-3-(4-dimethylamino-phenyl)-acryloyl]-pyridin-2-yl}-propanone (DMAPAPP) have been studied in different media. DMAPAPP exhibits a large red-shift in both absorption and emission spectra as the solvent polarity increases, indicating a large change in dipole moment of molecule upon excitation. The fluorescence quantum yield depends on the nature of the solvent. The absorption and emission spectra of DMAPAPP in dioxane–water mixture are also studied. The effect of different type of surfactants to determine their critical micellar concentration (CMC) and the microemulsion effect on the electronic absorption and emission spectra of DMAPAPP are recorded. The effect of acidity on the electronic absorption and emission spectra of DMAPAPP is studied to determine the pKa and pKa? values. |
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