Coumarin 314 |
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| The chemical structure of Coumarin 314 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 Coumarin 314 dissolved in ethanol. It was measured by R. A. Fuh on 6/12/95 [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]. Coumarin 314 has a molar extinction coefficient of 46,800 M-1cm-1 at 436 nm [G. A. Reynolds and K. H. Drexhage, "New coumarin dyes with rigidized structure for flashlamp-pumped dye lasers," Optics Commun., 13, 222-225, 1975]. Other fluorescence quantum yields (ethanol) include 0.77 [R. R. Birge, "Kodak Laser Dyes," 1987] and 0.86 [J. A. van Gompel and G. B. Schuster, "Photophysical behavior of ester-substituted aminocoumarins: A new twist.," J. Phys. Chem., 93, 1292-1295, 1989]. The fluorescence yield is only weakly dependent on solvent [J. A. van Gompel and G. B. Schuster, "Photophysical behavior of ester-substituted aminocoumarins: A new twist.," J. Phys. Chem., 93, 1292-1295, 1989]. |
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Fluorescence
This is the fluorescence emission spectrum of Coumarin 314 dissolved in ethanol. The spectrum was taken by R. A. Fuh on 6/12/95 using an excitation wavelength of 380 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 0.68 [G. A. Reynolds and K. H. Drexhage, "New coumarin dyes with rigidized structure for flashlamp-pumped dye lasers," Optics Commun., 13, 222-225, 1975]. |
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