Ethyl p-dimethylaminobenzoate |
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| The chemical structure of Ethyl p-dimethylaminobenzoate is shown at the right. The absorption and fluorescence emission spectra are shown below. The structure, absorption, and fluorescence data were all obtained from the PhotochemCAD package by Jonathan Lindsey. This excellent program allows rapid comparison of spectra and enables one to do a variety of photochemically relevant calculations. |
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Absorption
This is a graph of the molar extinction coefficient of Ethyl p-dimethylaminobenzoate dissolved in ethanol. It was measured by Junzhong Li on 12/11/97 [H. Du, R. A. Fuh, J. Li, A. Corkan, J. S. Lindsey, "PhotochemCAD: A computer-aided design and research tool in photochemistry," Photochemistry and Photobiology, 68, 141-142, 1998]. Ethyl p-dimethylaminobenzoate has a molar extinction coefficient of 23,160 M-1cm-1 at 310.3 nm [E. Christensen and A. C. Giese, "Photosensitivity of sunscreens," J. Am. Pharm. Assoc., 223-226, 1950].
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Fluorescence
This is the fluorescence emission spectrum of Ethyl p-dimethylaminobenzoate dissolved in cyclohexane. The spectrum was taken by Junzhong Li on 12/11/97 using an excitation wavelength of 290 nm [H. Du, R. A. Fuh, J. Li, A. Corkan, J. S. Lindsey, "PhotochemCAD: A computer-aided design and research tool in photochemistry," Photochemistry and Photobiology, 68, 141-142, 1998]. The quantum yield is 0.29 [R. J. Visser, P. C. M. Weisenborn, and C. A. G. O. Varma, "Solute-solvent exciplexes as the source of anomalous fluorescence from 4-N,N-dimethylamino-ethylbenzoate in 1,4-dioxane and in polar solvents.," Chem. Phys. Lett., 113, 330-336, 1985]. |
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