Coumarin 343 |
|
| The chemical structure of Coumarin 343 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. |
|
Absorption
This is a graph of the molar extinction coefficient of Coumarin 343 dissolved in ethanol. It was measured by R. A. Fuh on summer, 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 343 has a molar extinction coefficient of 44,300 M-1cm-1 at 444.75 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].
|
|
Fluorescence
This is the fluorescence emission spectrum of Coumarin 343 dissolved in ethanol. The spectrum was taken by R. A. Fuh on summer, 95 using an excitation wavelength of 400 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 0.63 [G. A. Reynolds and K. H. Drexhage, "New coumarin dyes with rigidized structure for flashlamp-pumped dye lasers," Optics Commun., 13, 222-225, 1975]. |
|