Stilbene |
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| The chemical structure of Stilbene 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 Stilbene dissolved in hexane. 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]. Stilbene has a molar extinction coefficient of 29,000 M-1cm-1 at 293.8 nm [R. N. Beale and E. M. F. Roe, "Ultra-violet absorption spectra of trans- and cis-stilbenes and their derivatives. Part I. Trans- and cis-stilbenes.," J. Chem. Soc.,, 2755-2763, 1953]. The solvent mixture used to determine the fluorescence yield MCH/IH presumably refers to methylcylcohexane and isohexane [M. T. Allen and D. G. Whitten, "The photophysics and photochemistry of a,w-diphenylpolyene singlet states," Chem. Rev., 89, 1691-1702, 1989]. |
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Fluorescence
This is the fluorescence emission spectrum of Stilbene dissolved in hexane. 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 0.05 [M. T. Allen and D. G. Whitten, "The photophysics and photochemistry of a,w-diphenylpolyene singlet states," Chem. Rev., 89, 1691-1702, 1989]. |
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