Diprotonated-tetraphenylporphyrin |
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| The chemical structure of Diprotonated-tetraphenylporphyrin 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 Diprotonated-tetraphenylporphyrin dissolved in chloroform + HCl. 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]. Diprotonated-tetraphenylporphyrin has a molar extinction coefficient of 431,000 M-1cm-1 at 444.5 nm [A. Stone and E. B. Fleischer, "The molecular and crystal structure of porphyrin diacids.," J. Am. Chem. Soc., 90, 2735-2748, 1968].
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Fluorescence
This is the fluorescence emission spectrum of Diprotonated-tetraphenylporphyrin dissolved in chloroform + HCl. The spectrum was taken by Junzhong Li on 12/11/97 using an excitation wavelength of 445 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 0.14 [O. Ohno, Y. Kaizu, and H. Kobayashi, "Luminescence of some metalloporphins including the complexes of the IIIb metal group.," J. Chem. Phys., 82, 1779-1787, 1985]. |
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