Achieving High Quantum Yield Charge Separation in Porphyrin-Containing Donor—Acceptor Molecules at 10 K

Journal of the American Chemical Society

Volumn 110, Issue 21, 1988, Pages 7219-7221

  Wasielewski, Michael R ^a   Johnson, Douglas G ^a   Svec, Walter A ^a   Kersey, Kristin M ^a   Minsek, David W ^a  

^a ARGONNE NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 33845278031     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja00229a050     Document Type: Article

References (12)

1. (a) Harrison, R. J.; Pearce, B.; Beddard, G. S.; Cowan, J. A.; Sanders, J. K. M. Chem. Phys. 1987, 116, 429. (b) Leland, B. A.; Joran, A. D.; Felker, P. M.; Hopfield, J. J.; Zewail, A. H.; Dervan, P. B. J. Phys. Chem. 1985, 89, 5571.
2. Kirmaier, C.; Holten, D. Photosynth. Res. 1987, 13, 225.
3. Marcus, R. A. J. Chem. Phys. 1956, 24, 966.
4. Seybold, P. G.; Goutermann, M. J. Mol. Spectrosc. 1969, 31, 1.
5. Wasielewski, M. R.; Fenton, J. M.; Govindjee, Photosynth. Res. 1987, 12, 181.
6. Fajer, J.; Borg, D. C.; Forman, A.; Dolphin, D.; Felton, R. H. J. Am. Chem. Soc. 1970, 92, 3451.
7. The kinetics for all transient absorption changes were Fit well with single exponential functions: Provencher, S. W. J. Chem. Phys. 1976, 64, 2772.
8. Pekkarinen, L.; Linschitz, H. J. Am. Chem. Soc. 1960, 82, 2407.
9. Thurnauer, M. C.; Katz, J. J.; Norris, J. R. Proc. Natl. Acad. Sci. U.S.A. 1975, 72, 3270.
10. van der Waals, J. H.; van Dorp, W. G.; Schaafsma, T. J. In The Porphyrins, Vol. 4; Dolphin, D., Ed.; Academic Press: New York, 1979; pp 257ff.
11. This mechanism is distinctly different from radical pair intersystem crossing driven by the electron-nuclear hyperfine interaction: Okada, T.; Karaki, I.; Matsuzawa, E.; Mataga, N.; Sakata, Y.; Misumi, S. J. Phys. Chem. 1981, 85, 3957.
12. Proton NMR studies of 1 and 2 as a function of temperature show that the rneso-phenyl that is part of the triptycene relaxes to a conformation perpendicular to the plane of the porphyrin as the temperature is lowered. At room temperature the meso-phenyl groups of TPP are known to occupy a dihedral angle of about 80° relative to the porphyrin plane: Fleischer, E. B. Acc. Chem. Res. 1970, 3, 105.