X- and W-band time-resolved electron paramagnetic resonance studies on radical-excited triplet pairs between metalloporphyrins and axial-ligating nitroxide radicals

Journal of Physical Chemistry A

Volumn 101, Issue 33, 1997, Pages 5869-5876

  Fujisawa, Jun Ichi ^a   Ishii, Kazuyuki ^a   Ohba, Yasunori ^a   Yamauchi, Seigo ^a   Fuhs, Michael ^b   Möbius, Klaus ^b  

^a TOHOKU UNIVERSITY   (Japan)

^b FREIE UNIVERSITÄT BERLIN   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

AROMATIC COMPOUNDS; ELECTRON SPIN RESONANCE SPECTROSCOPY; ELECTRON TRANSITIONS; POLARIZATION;

CHEMICALLY INDUCED DYNAMIC ELECTRON SPIN POLARIZATION; METALLOPORPHYRINS; TIME-RESOLVED ELECTRON SPIN RESONANCE;

FREE RADICALS;

EID: 0031210201     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp971147o     Document Type: Article

References (65)

1. (a) Blättler, C.; Jent, F.; Paul, H. Chem. Phys. Lett. 1990, 166, 375.
2. Jenks, W. S.; Turro, N. J. Res. Chem. Interned. 1990, 13, 237.
3. (b) Turro, N. J.; Khudyakov, I. V.; Bossmann, S. H.; Dwyer, D. W. J. Phys. Chem. 1993, 97, 1138.
4. (a) Kawai, A.; Okutsu, T.; Obi, K. J. Phys. Chem. 1991, 95, 9130.
5. (b) Kawai, A.; Obi, K. J. Phys. Chem. 1992, 96, 52; Res. Chem. Intermed. 1993, 19, 865.
6. (b) Kawai, A.; Obi, K. J. Phys. Chem. 1992, 96, 52; Res. Chem. Intermed. 1993, 19, 865.
7. (a) Shushin. A. I. Z. Phys. Chem. 1993, 182, 9.
8. (b) Goudsmit G,-H.; Paul, H. Chem. Phys. Lett. 1993, 208, 73.
9. (c) Goudsmit G.-H.; Paul, H.; Shushin, A. I. J Phys. Chem. 1993, 97, 13243.
10. Zilber, G.; Rozenshtein, V.; Cheng, P.-C.; Scott, L. T.; Rabinovitz, M.; Levanon, H. J. Am. Chem. Soc. 1995, 117, 10720.
11. (a) Fujisawa, J.; Ishii, K.; Ohba, Y.; Iwaizumi, M.; Yamauchi, S. J. Phys. Chem. 1995, 99, 17082.
12. (b) Fujisawa, J.; Ohba, Y.; Yamauchi, S. J. Phys. Chem. A 1997, 101, 434.
13. (a) Smith, B. E.; Gouterman, M. Chem. Phys. Lett. 1968, 2, 517.
14. (b) Eastwood, D.; Gouterman, M. J. Mol. Spectrosc. 1969, 30, 437.
15. (c) Gouterman, M.; Mathies, R. A.; Smith, B. E. J. Chem. Phys. 1970, 52, 3795.
16. (d) Kim, D.; Holten, D.; Gouterman, M. J. Am. Chem. Soc. 1984, 106, 2793.
17. (e) Yan, X.; Holten, D. J. Phys. Chem. 1988, 92, 5982.
18. (a) van Dorp, W. G.; Canters, G. W.; van der Waals, J. H. Chem. Phys. Lett. 1975, 35, 450.
19. (b) van Dijk, N.; van der Waals, J. H. Mol. Phys. 1979, 38, 1211.
20. (c) van der Poel, W. A. J. A.; Nuijs, A. M.; van der Waals, J. H. J. Phys. Chem. 1986, 90, 1537.
21. Brugman, C. J. M.; Rettschnick, R. P. H.; Hoytink, G. J. Chem. Phys. Lett. 1971, 8, 263.
22. Kothe, G.; Kim, S. S.; Weissman, S. I. Chem. Phys. Lett. 1980, 71, 445.
23. Corvaja. C.; Maggini, M.; Prato, M.; Scorrano, G.; Venzin, M. J. Am. Chem. Soc. 1995, 117, 8857.
24. Ishii, K.; Fujisawa, J.; Ohba, Y.; Yamauchi, S. J. Am. Chem. Soc. 1996, 118, 13079.
25. (a) Faulkner, L. R.; Bard, A. J. J. Am. Chem. Soc. 1969, 91, 6497.
26. (b) Schulten, K. J. J. Chem. Phys. 1984, 80, 3668.
27. Yamauchi, S.; Matsukawa, Y.; Ohba, Y.; Iwaizumi, M. Inorg. Chem. 1996, 35, 2910.
28. (a) Levanon, H.; Regev, A.; Galili, T.; Hugerat, M.; Chang, C. K.; Fajer, J. J. Phys. Chem. 1993, 97, 13198.
29. (b) Levanon, H. Rev. Chem. Interned. 1987, 8, 287.
30. Ishii, K.; Ohba, Y.; Iwaizumi, M.; Yamauchi, S. J. Phys. Chem. 1996, 100, 3839.
31. Adler, A. D.; Longo, F. R.; Finarelli, J. D.; Goldmacher, J.; Assour, J.; Korsakoff, L. J. Org. Chem. 1967, 32, 476.
32. Adler, A. D.; Longo, F. R.; Kampas, F.; Kim, J. B. J. Inorg. Nucl. Chem. 1970, 32, 2443.
33. Lindsey, J. S.; Woodford, J. N. Inorg. Chem. 1995, 34, 1063.
34. Caneshi, A.; Gatteschi, D.; Rey, P. Prog. Inorg. Chem. 1991, 39, 331.
35. (a) Prisner, T. F.; Rohrer, M.; Möbius, K. Appl. Magn. Reson. 1994, 7, 167.
36. (b) Prisner, T. F.; van der Est, A.; Bittl, R.; Lubitz, W.; Stehlik, D.; Möbius, K. Chem. Phys. Lett. 1995, 194, 361.
37. Miller, J. R.; Dorough, G. D. J. Am. Chem. Soc. 1952, 74, 3977.
38. The phosphorescence spectrum observed for the ZnTPP-nit-o-py system showed a red-shifted component at λ= 794 nm with respect to that (λ = 772 nm) of ZnTPP. The magnitude of the shift (22 nm) is very close to those (24 ± 2 nm) observed for the radical-complexed ZnTPPs in the ZnTPP-nit-p-py and the ZnTPP-nit-m-py systems, indicating the ligation occurring in the nit-o-py system.
39. 25
40. (a) Zheludev, A. Z.; Barone, V.; Bonnet, M.; Delley, B.; Grand, A.; Ressouche, E.; Rey, P.; Subra, R.; Schweizer, J. J. Am. Chem. Soc. 1994, 116, 2019.
41. (b) Yamanaka, S.; Kawakami, T.; Yamada, S.; Nagao, H.; Nakano, M.; Yamaguchi, K. Chem. Phys. Lett. 1995, 240, 268.
42. Fujisawa, J.; Ohba, Y.; Yamauchi, S. Submitted to J. Am. Chem. Soc.
43. McLauchlan, K. A. Modern Pulsed and Continuous-Wave Electron Spin Resonance; Kevan, L., Bowman, M. K., Eds.; Wiley: New York, 1990; Chapter 7.
44. 1 ZnTPP.
45. 14,31 respectively.
46. Dorough, G. D.; Miller, J. R.; Huennekens, F. M. J. Am. Chem. Soc. 1951, 73, 4315.
47. (a) Harriman A. J. Chem. Soc., Faraday Trans. 1 1980, 76, 1978.
48. (b) Ohno, O. Kaizu, Y.; Kobayashi, H. J. Chem. Phys. 1985, 82, 1779.
49. Seth, J.; Bocian, D. F. J. Am. Chem. Soc. 1994, 116. 143.
50. Bencini, A.; Gatteschi, D. EPR of Exchange Coupled Systems; Springer-Verlag: Berlin, 1990; Chapter 3.
51. Fajer, J.; Borg, D. C. Forman, A.; Dolphin, D.; Felton, R. H. J. Am. Chem. Soc. 1970, 92, 3451.
52. 1 MgTPP are estimated to be 2.001 and 2.003, respectively, by using eq 2.
53. (a) Harriman, A. J. Chem. Soc., Faraday Trans. 2 1981, 77, 1281.
54. (b) Rodriguez, J.; Kirmaier, C.; Holten, D. J. Am. Chem. Soc. 1989, 111, 6500.
55. 6b
56. The difference between the observed decay time of the first polarization and the reported SLR time of the radical is considered to originate from the overlapping contribution of the broad signal.
57. 3, respectively, where r is the radius of the hydrodynamic spherical molecule.
58. Salikhov, K. M.; Molin, Y. N.; Sagdeev, R. Z.; Buchachenko, A. L. Spin Polarization and Magnetic Effects in Radical Reactions; Elsevier: Amsterdam, 1984.
59. (a) Awaga, K.; Inabe, T.; Maruyama, Y. Chem. Phys. Lett. 1992, 190, 349.
60. (b) Awaga, K.; Inabe, T.; Nagashima, U.; Maruyama, Y. J. Chem. Soc., Chem. Commun. 1989, 1617.
61. Davis, M. S.; Morokuma, K.; Kreilick, R. W. J. Am. Chem Soc. 1972, 94, 5588.
62. Miller, J. S.; Epstein, A. J. Angew. Chem., Int. Ed. Engl. 1994, 33, 385.
63. Kahn, O. Molecular Magnetism; VCH: New York, 1993.
64. (a) Gouterman, M. In The Porphyrins; Dolphin, D., Ed.; Academic Press: New York, 1978; Vol. III, pp 1-165.
65. (b) Awaga, K.; Yokoyama, T.; Fukuda, T.; Masuda, S.; Harada, Y.; Maruyama, Y.; Sato, N. Mol. Cryst. Liq. Cryst. 1993, 232, 27.