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  • 1985-1989  (4)
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Erscheinungszeitraum
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  • 1
    Digitale Medien
    Digitale Medien
    Reply to "Comment on: ‘Cytochrome oxidation in bacterial photosynthesis' '' (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 3394-3395 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.454906
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    A unified theory of electron transfer and internal conversion based on solitary electronic states (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 354-365 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: A description of electron transfer processes is presented which makes use of the concept of solitary states for the construction of the initial and the final state wave functions. Even though this concept is closely related to an adiabatic description in the sense that it provides partial delocalization of these states it also assures localization for a symmetric donor–acceptor system. The theory can be applied to arbitrary values of the internal parameters characterizing the system, that is the electronic donor–acceptor coupling V, the free energy change ΔE, and the coupling of the electron to nuclear motions represented by a Stokes shift S. This way the theory of nonadiabatic electron transfer processes is put on equal footing with the theory of adiabatic transitions and even more interestingly the same concept unifies the common electron transfer theory and the theory of internal conversion processes if ||ΔE|| and (or) ||V|| exceed S. It is shown analytically how the results of the conventional treatments for adiabatic, nonadiabatic, and internal conversion processes fall out of this theory as special cases. It is further examplified how the system develops from the so-called normal regime with ||ΔE||〈S into the inverted regime with ||ΔE||〉S as function of ΔE for fixed parameters of V and S and as function of V for fixed parameters of ΔE and S.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.456481
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  • 3
    Digitale Medien
    Digitale Medien
    Electron transfer and protein dynamics (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 3880-3887 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The electron transfer process from cytochrome c to the special pair is revisited. In the present model the transfer rate in photosynthetic reaction centers of Chromatium vinosum is modulated by fluctuations of the dielectric constant of the protein environment between the donor and acceptor site. The fluctuations enter the rate expression as the inverse of a Lamb–Mössbauer factor. The strong temperature dependence of the transfer rate can thus be related to protein specific dynamics. Experimental evidence about such dynamics is provided by recently recorded Mössbauer spectra of iron containing proteins [Parak et al., J. Mol. Biol. 161, 177 (1982)].
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.452943
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  • 4
    Digitale Medien
    Digitale Medien
    Recombination of radicals in solution. A theoretical study on the influence of two- and many-site hopping on the microwave field effect (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 2913-2922 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Unpaired electron spins on radicals in solution can hop between several molecules of the same species. Two types of hopping process are considered: (1) intermolecular hopping, where the unpaired spin can jump to many molecules and (2) intramolecular hopping, where it jumps between the two equivalent sites of a connected dimer. In both cases the hopping process leads to characteristic changes of the magnetic field dependence of the triplet recombination yield observed by reaction yield detected magnetic resonance (RYDMR) experiments. This allows one to discriminate between many- and two-site hopping and to determine the value of the hopping rate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.449245
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