Study of novel fluorescent coumarin-3,4-dihydropyrimidin-2(1H)-ones dyads. Estimation of ground- and excited-state dipole moments from a solvatochromic shift
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- 作者：Amina Benazzouza ; b ; Malika Makhloufi-Cheblia ; b ; Safouane M. Hamdic ; Baya Boutemeur-Kheddisb ; Artur M.S. Silvad ; artur.silva@ua.pt" class="auth_mail" title="E-mail the corresponding author ; Maamar Hamdib ; prhamdi@gmail.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：3 ; 4-Dihydropyrimidones ; Coumarins ; Photophysical properties ; Solvatochromic effect ; Dipole moments ; Quantum yields ; Polarity solvents
- 刊名：Journal of Molecular Liquids
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：219
- 期：Complete
- 页码：173-179
- 全文大小：675 K
文摘
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The solvent effect on the absorption and emission spectra of three coumarin-3,4-dihydropyrimidones are described.
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Dipole moments of the excited state of all molecules are higher than those of the ground-state.
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The quantum yields of the molecules vary (9 to 22%) with the change in the solvent polarity.
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The tested molecules are characterized by good fluorescence efficiency even in aprotic apolar media.