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Volumn 111, Issue 13, 2007, Pages 2527-2541

Reactions of hydrated electron with various radicals: Spin factor in diffusion-controlled reactions

Author keywords

[No Author keywords available]

Indexed keywords

AZIDYL RADICAL; HYDRATED ELECTRON; OPTICAL ABSORPTION MEASUREMENT; SMOLUCHOWSKI EQUATION;

EID: 34247519166     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0684527     Document Type: Article
Times cited : (25)

References (206)
  • 2
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    • McLauchlan, K. A. Continuous-Wave Transient Electron Spin Resonance. In Modern Pulsed and Continuous-Wave Electron Spin Resonance; Kevan, L., Bowman, M. K., Eds.; John Wiley & Sons: New York, 1990.
    • (1990) Modern Pulsed and Continuous-Wave Electron Spin Resonance
    • McLauchlan, K.A.1
  • 5
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    • On the, Ph.D. Dissertation, University of Notre Dame, Notre Dame, IN
    • Ichino, T. On the Mechanism of Unusual CIDEP. Ph.D. Dissertation, University of Notre Dame, Notre Dame, IN, 2001.
    • (2001) Mechanism of Unusual CIDEP
    • Ichino, T.1
  • 17
    • 34247503196 scopus 로고    scopus 로고
    • Hyperfine interaction (as well as, in the presence of magnetic field, the Larmor frequency difference) can induce singlet-triplet conversion for radical pairs between an encounter and any subsequent re-encounters, which modifies the spin factor for singlet reaction. For the radical systems in the present study, this transition may raise the statistical factor from 0.25 by, perhaps, up to 0.02; see Figure 8b in ref 1. We ignore such an effect and continue to use the nominal value for discussion.
    • Hyperfine interaction (as well as, in the presence of magnetic field, the Larmor frequency difference) can induce singlet-triplet conversion for radical pairs between an encounter and any subsequent re-encounters, which modifies the spin factor for singlet reaction. For the radical systems in the present study, this transition may raise the statistical factor from 0.25 by, perhaps, up to 0.02; see Figure 8b in ref 1. We ignore such an effect and continue to use the nominal value for discussion.
  • 19
    • 34247513452 scopus 로고    scopus 로고
    • The Radiation Chemistry Data Center
    • The Radiation Chemistry Data Center, Notre Dame Radiation Laboratory, http://allen.rad.nd.edu.
    • Notre Dame Radiation Laboratory
  • 20
    • 0002627604 scopus 로고
    • Radiation Chemistry of the Liquid State: (1) Water and Homogeneous Aqueous Solutions
    • Farhataziz, Rodgers, A. J, Eds, VCH: New York, Chapter 10
    • Buxton, G. V. Radiation Chemistry of the Liquid State: (1) Water and Homogeneous Aqueous Solutions. In Radiation Chemistry: Principles and Applications; Farhataziz, Rodgers, A. J., Eds.; VCH: New York, 1987; Chapter 10.
    • (1987) Radiation Chemistry: Principles and Applications
    • Buxton, G.V.1
  • 51
    • 85050068560 scopus 로고
    • Spin-Statistical Factors in Diffusion-Controlled Reactions
    • Volman, D. H, Hammond, G. S, Gollnick, K, Eds, John Wiley and Sons: New York
    • Saltiel, J.; Atwater, B. W. Spin-Statistical Factors in Diffusion-Controlled Reactions. In Advances in Photochemistry; Volman, D. H., Hammond, G. S., Gollnick, K., Eds.; John Wiley and Sons: New York, 1988; Vol. 14; pp 1-90.
    • (1988) Advances in Photochemistry , vol.14 , pp. 1-90
    • Saltiel, J.1    Atwater, B.W.2
  • 59
    • 34247539000 scopus 로고    scopus 로고
    • There is a significant difference in the Gε values for the thiocyanate system reported in refs 56 and 57. We take a value from ref 57 because the study apparently used a more careful approach to deterimine the Cε values
    • There is a significant difference in the Gε values for the thiocyanate system reported in refs 56 and 57. We take a value from ref 57 because the study apparently used a more careful approach to deterimine the Cε values.
  • 63
    • 34247511524 scopus 로고    scopus 로고
    • act) is called a true activation energy.
    • act) is called a true activation energy.
  • 89
    • 33947088937 scopus 로고    scopus 로고
    • The spin-rotation mechanism is probably very effective for the spin relaxation of nitrite radical because of the small moment of inertia. See Behar, D, Fessenden, R. W. J. Phys. Chem. 1972, 76, 1706, and ref 76. However, it is likely that the spin relaxation of nitrite radical is not as fast as that of the azidyl radical
    • The spin-rotation mechanism is probably very effective for the spin relaxation of nitrite radical because of the small moment of inertia. See Behar, D.; Fessenden, R. W. J. Phys. Chem. 1972, 76, 1706, and ref 76. However, it is likely that the spin relaxation of nitrite radical is not as fast as that of the azidyl radical.
  • 125
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    • 2 is assumed.
    • 2 is assumed.
  • 131
    • 34247537939 scopus 로고    scopus 로고
    • According to ref 73, the reaction distance of the eaq, reaction with I2 is 11 Å at room temperature. We show in the Supporting Information that the apparent activation energy of this reaction is 17.3 ± 0.6 kJ mol-1 over a temperature range of 20-70°C. Thus, analogous to the eaq, nitrobenzene reaction system, the reaction distance may decrease with temperature in this system
    • - + nitrobenzene reaction system, the reaction distance may decrease with temperature in this system.
  • 136
    • 34247505841 scopus 로고    scopus 로고
    • The analysis of the stochastic Liouville equation for CIDEP in ref 1 essentially gives the same conclusion.
    • The analysis of the stochastic Liouville equation for CIDEP in ref 1 essentially gives the same conclusion.
  • 140
    • 34247532355 scopus 로고    scopus 로고
    • Ichino, T.; Fessenden, R. W. unpublished data.
    • Ichino, T.; Fessenden, R. W. unpublished data.
  • 146
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    • In ref 71, the zero-field splitting mixing of the doublet-quartet pair states has been considered. In addition, the spin relaxation time for O 2 must be very short due to the modulation of the zero-field splitting
    • 2 must be very short due to the modulation of the zero-field splitting.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.