MgTPP |
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| The chemical structure of Magnesium tetraphenylporphyrin (MgTPP) 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 Magnesium tetraphenylporphyrin (MgTPP) dissolved in toluene. It was measured by Richard W. Wagner on 6/25/97 [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]. Magnesium tetraphenylporphyrin (MgTPP) has a molar extinction coefficient of 22,000 M-1cm-1 at 564 nm [J. R. Miller and G. D. Dorough, "Pyridinate complexes of some metallo-derivatives of tetraphenylporphine and tetraphenylchlorin.," J. Am. Chem. Soc., 74, 3977-3981, 1952]. The fluorescence yield has been reported to be 0.146 [A. T. Gradyushko and M. P. Tsvirko, "Probabilities of intercombination transitions in porphyrin and metalloporphyrin molecules," Optics and Spectroscopy, 31, 291-295, 1971], 0.15 [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] and [A. Harriman, "Luminescence of porphyrins and metalloporphyrins. Part 3. - Heavy-atom effects.," J. Chem. Soc., Faraday Trans. I, 77, 1281-1291, 1981], and 0.17 [T. G. Politis and H. G. Drickamer, "High pressure luminescence of metalloporphyrins in liquid solution.," J. Chem. Phys., 76, 285-291, 1982]. |
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Fluorescence
This is the fluorescence emission spectrum of Magnesium tetraphenylporphyrin (MgTPP) dissolved in toluene. The spectrum was taken by Richard W. Wagner on 6/25/97 using an excitation wavelength of 565 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 0.15 [J. P. Strachan, S. Gentemann, J. Seth, W. A. Kalsbeck, J. S. Lindsey, D. Holten, and D. F. Bocian, "Effects of orbital ordering on electronic communication in multiporphyrin arrays.," J. Am. Chem. Soc., 119, 11191-11201, 1997]. |
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