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Additional resources for Bioluminescence and Chemiluminescence: Basic Chemistry and Analytical Applications
M. , L. A. Bottomley, I nor g. Chem. 19_, 832 (1980). , Coord. Chem. Rev. 6_, 247 (1971). Miller, J. R. , G. D. Do rough, J. Am. Chem. Soc. 74_, 3977 (1952). Vogel, G. C , J. R. Stahlbush, Inorg. Chem. 16_, 950 (1977). DISCUSSION Dr. McElroy I wanted to ask Dr. Schuster, dealing with the oxidation potentials, you didn't mention the color of the light and whether there were changes in the color of the light as you change their potential. Dr. Schuster In the case of the dioxetanone the emission we detect is in all cases identical to the fluorescence of the activator so that the color of the light corresponds to that of the fluorescence.
Evidently, the metal ion plays a crucial role in causing the unusually efficient catalysis by MgTPP and ZnTPP. To investigate further the mechanism of this metal ion dependent catalysis we examined the effect of changing the metal ion on IQ/f>f and k C A T for tetraphenyl- and tetraanisylporphyrins. Cyclic voltainmetric measurements have revealed that for zinc, cadmium, and magnesium porphyrins the first oxidation is ligand centered (10) . On the other hand, for silver and cobalt porphyrin the first oxidation is metal centered (11).
McGlynn, S. , T. Azumi, and M. Kinoshita, Molecular 4. J. (1969). 7. 8. 9. 10. 11. 12. 13. 14. Becker, R. , Theory and Interpretation of Fluorescence and Phosphorescence, 283, Wiley Interscience, New York (1969). , in "Paths of Molecular Excitation" in Bioenergetics (L. G. ), 243, Radiation Research, Supplement 2, (1960). Henry, B. , and M. Kasha, in "Radiationless Molecular Electronic Transitions," Ann. Reviews Phys. Chem. 19, 161 (1968). Lin, S. , J. Chem. Phys. 44, 3759 (1966). , and J. J. Jortner, J.