Time-resolved Raman study of the oxidation mechanism of aromatic diamines bẏOH radical in water

Journal of Physical Chemistry A

Volumn 103, Issue 45, 1999, Pages 9055-9060

  Tripathi, G N R ^a   Sun, Q ^a,b  

^a UNIVERSITY OF NOTRE DAME   (United States)

^b NONE

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001035550     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp9927552     Document Type: Article

References (32)

1. von Sonntag, C. The Chemical Basis of Radiation Biology; Taylor and Francis: New York, 1987.
2. Nonhebel, D. C.; Walton, J. C. Free-radical Chemistry: Structure and Mechanism; Cambridge University Press: Cambridge, 1974.
3. ̇OH reactions in water are cited.
4. Bard, A. J.; Fox, M. A. Acc. Chem. Res. 1995, 28, 141.
5. Fox, M. A. Sol. Energy Mater. 1995, 38, 381.
6. Steenken, S. Top. Curr. Chem. 1996, 177, 125.
7. Steenken, S. J. Chem. Soc., Faraday Trans. 1 1987, 83, 113 and references therein.
8. ̇OH at pH 7, for which we are thankful.
9. Rosenstock, H. M.; Draxl, K.; Steiner, B. W.; Herren, J. T. J. Phys. Chem. Ref. Data 1977, 6 (Suppl. 1).
10. Pauling, L. The Nature of the Chemical Bond; Cornell University Press: Ithaca, New York, 1960.
11. Rao, P. S.; Hayon, E. J. Phys. Chem. 1975, 79, 1063.
12. Chipman, D. M.; Sun, Q.; Tripathi, G. N. R. J. Chem. Phys. 1992, 97, 8073.
13. Emstbrunner, E. E.; Girling, R. B.; Grossman, W. E. L.; Mayer, E.; Williams, K. P. J.; Hester, R. E. J. Roman Spectrosc. 1981, 10, 161.
14. Tripathi, G. N. R. J. Phys. Chem. A 1998, 102, 2388.
15. Tripathi, G. N. R.; Su, Y.; Bentley, J. J. Am. Chem. Soc. 1995, 117, 5540.
16. Tripathi, G. N. R.; Su, Y.; Bentley, J.; Fessenden, R. W.; Jiang, P.-Y. J. Am. Chem. Soc. 1996, 118, 2245.
17. Tripathi, G. N. R.; Su, Y. J. Am. Chem. Soc. 1996, 118, 2235. These papers discuss the relationship between the electronic structure and proton reactivity of nitrogen-containing radicals.
18. Bell, R. P. The Proton in Chemistry; Cornell University Press: Ithaca, New York, 1959.
19. Tripathi, G. N. R. In Time-resolved Spectroscopy; Clark, R. J. H., Hester, R. E., Eds.; Advances in Spectroscopy 18; John Wiley & Sons: New York, 1989; pp 157-218.
20. Tripathi, G. N. R. In Multichannel Image Detectors II; Talmi, Y., Ed.; ACS Symposium Series 236; American Chemical Society: Washington, D.C., 1983; p 171.
21. Patterson, L. K.; Lilie, J. Int. J. Radiat. Phys. Chem. 1974, 6, 129.
22. Serjeant, E. P.; Dempsey, P. Ionisation Constants of Organic Acids in Aqueous Solution; Pergamon Press: Oxford, 1979.
23. - from the adduct radicals is also catalyzed by the acid form of the parent amines. The rates reported in this work include this component.
24. Sun, Q.; Tripathi, G. N. R.; Schuler, R. H. J. Phys. Chem. 1990, 94, 2216.
25. -1). Tripathi, G. N. R. Chem. Phys. Lett. 1992, 199, 409.
26. Holcman, J.; Sehested, K. J. Phys. Chem. 1976, 80, 1642. Reaction on 10 μs or faster time scale can also occur because of small amounts of impurities (∼0.1%). Therefore, the use of high concentration of p-phenylenediamine was generally avoided.
27. Tripathi, G. N. R.; Schuler, R. H. J. Phys. Chem. 1984, 88, 1706.
28. Tripathi, G. N. R.; Schuler, R. H. J. Chem. Phys. 1982, 76, 4289.
29. Sun, Q.; Tripathi, G. N. R.; Schuler, R. H. J. Phys. Chem. 1990, 94, 6273.
30. The weak absorption in the 440 nm region in Figure 3e is due to the p-aminophenoxyl radical. However, it is a difference between two large quantities and, therefore, cannot be used for determining the yield.
31. The two-step formation of cation radical is not observed in strongly acidic solutions (pH < 2) because of very fast conversion of the adduct radical (proton and substrate catalyzed) into the cation radical.
32. Qin, L.; Tripathi, G. N. R.; Schuler, R. H. Z. Naturforsch. A 1985, 40, 1026.