Porphin |
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| The chemical structure of Porphin 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 Porphin dissolved in toluene. 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]. Porphin has a molar extinction coefficient of 261,000 M-1cm-1 at 396.3 nm [U. Eisner and R. P. Linstead, "Chlorophyll and related compounds. Part II. The dehydrogenation of chlorin to porphin and the number of extra hydrogen atoms in the chlorins.," J. Chem. Soc., 3749-3754, 1955].
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Fluorescence
This is the fluorescence emission spectrum of Porphin dissolved in toluene. The spectrum was taken by Junzhong Li on 12/11/97 using an excitation wavelength of 396 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 0.043 [A. T. Gradyushko, A. N. Sevchenko, K. N. Solovyov, and M. P. Tsvirko, "Energetics of photophysical processes in chlorophyll-like molecules," Photochem. Photobiol., 11, 387-400, 1970]. |
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