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• W2029121184 abstract "A detailed investigation of the photophysical properties of a new coumarin heterodimer: 2-(7-diethylamino-3-coumarinyl)-5-oxo-4-methyl [1] benzopyrano(3,4-c)pyridine (CBP) has been performed in a range of nonpolar and polar solvents at room temperature. In addition, the influence of temperature on the excited state properties of CBP in dichloromethane, methanol and dimethylsulfoxide has also been investigated. These studies indicate that the fluorescence of the dye is from the pre-twisted intramolecular charge transfer (ICT) state. AM1 semiempirical calculations performed for CBP in the ground, excited singlet and triplet states are in conformity with the experimental results. The presence of second coumarin is found to introduce a larger charge transfer character to the parent coumarin molecule when compared to other diethylamino coumarins. From this study it is also evident that such coumarin hetero dimers behave more like any other single absorbing and emitting chromophoric-systems." @default.
• W2029121184 created "2016-06-24" @default.
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• W2029121184 date "1998-07-01" @default.
• W2029121184 modified "2023-09-29" @default.
• W2029121184 title "Excited state properties of pre-twisted 7-diethylamino coumarinyl benzopyrano pyridine: an experimental and AMI study" @default.
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• W2029121184 doi "https://doi.org/10.1016/s1010-6030(98)00278-0" @default.
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