Pyrene |
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| The chemical structure of Pyrene 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 Pyrene dissolved in cyclohexane. 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]. Pyrene has a molar extinction coefficient of 54,000 M-1cm-1 at 335.25 nm [I. B. Berlman, Handbook of Fluorescence Spectra of Aromatic Molecules, Academic Press, 1971].
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Fluorescence
This is the fluorescence emission spectrum of Pyrene dissolved in cyclohexane. The spectrum was taken by R. A. Fuh on summer, 95 using an excitation wavelength of 317 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 0.32 [I. B. Berlman, Handbook of Fluorescence Spectra of Aromatic Molecules, Academic Press, 1971]. |
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