Time-resolved spectroscopic studies of B12 coenzymes: Comparison of the influence of solvent on the primary photolysis mechanism and germinate recombination of methyl-, ethyl-, n-propyl, and 5'-deoxyadenosylcobalamin
Article Abstract:
A transient absorption study of the photolysis of methylcobalamin, ethylcobalamin and n-propylcobalamin in ethylene glycol spanning six decades in time, from 10 fs to 10 ns was reported. The result suggested an influence of the solvent on the decay through the electrostatic influence of the solvent polarity on the barriers for decay or through the influence of solvent friction on the reaction.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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Time-resolved measurements of the photolysis and recombination of adenosylocobalamin bound to glutamate mutase
Article Abstract:
Femtosecond to nanosecond transient absorption spectroscopy is used to investigate the photolysis of 5'-deoxyadenosylcobalamin bound to glutamate mutase (coenzyme B(sub 12) AdoCb1). Excitation of AdoCb1 bound to glutamate mutase results in formation of a metal-to-ligand charge transfer intermediate state which decays to form cob(II)alamin with a time constant of 105 ps.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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Structure and function in the isolated reaction center complex of photosystem II: models for energy relaxation and charge separation in a protein matrix
Article Abstract:
A model is developed that explains the energy and charge transfer in photosystem II reaction center complexes. This model consists of chlorophyll electronic states coupled to the protein bath.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
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