Time-Resolved Chemically Induced Dynamic Nuclear Polarization Studies of Structure and Reactivity of Methionine Radical Cations in Aqueous Solution as a Function of pH

2005 ◽  
Vol 109 (45) ◽  
pp. 10459-10466 ◽  
Author(s):  
Olga B. Morozova ◽  
Sergey E. Korchak ◽  
Renad Z. Sagdeev ◽  
Alexandra V. Yurkovskaya
Keyword(s):  
Aqueous Solution ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Radical Cations ◽  
Time Resolved ◽  
Chemically Induced ◽  
Polarization Studies

scholarly journals Electron self-exchange activation parameters of diethyl sulfide and tetrahydrothiophene

2013 ◽  
Vol 9 ◽  
pp. 1448-1454
Author(s):  
Martin Goez ◽  
Martin Vogtherr
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Nuclear Polarization ◽  
Activation Barrier ◽  
Activation Parameters ◽  
Radical Cations ◽  
Free Energies ◽  
Time Resolved ◽  
Diethyl Sulfide ◽  
Chemically Induced

Electron transfer between the title compounds and their radical cations, which were generated by photoinduced electron transfer from the sulfides to excited 2,4,6-triphenylpyrylium cations, was investigated by time-resolved measurements of chemically induced dynamic nuclear polarization (CIDNP) in acetonitrile. The strongly negative activation entropies provide evidence for an associative–dissociative electron exchange involving dimeric radical cations. Despite this mechanistic complication, the free energies of activation were found to be well reproduced by the Marcus theory of electron transfer, with the activation barrier still dominated by solvent reorganization.

Chemically induced dynamic nuclear polarization studies of yeast tRNAPhe

Biochemistry ◽  
1984 ◽  
Vol 23 (9) ◽  
pp. 1935-1939 ◽  
Author(s):  
Elizabeth F. McCord ◽  
Kathleen M. Morden ◽  
Ignacio Tinoco ◽  
Steven G. Boxer
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Chemically Induced ◽  
Polarization Studies

Kinetic Evidence for Transiently Shifted Acidity Constant of Histidine Linked to Paramagnetic Tyrosine Probed by Intramolecular Electron Transfer in Oxidized Peptides

2021 ◽  
Author(s):  
Olga B. Morozova ◽  
Dmitri Stass ◽  
Alexandra V. Yurkovskaya
Keyword(s):  
Electron Transfer ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Intramolecular Electron Transfer ◽  
Acidity Constant ◽  
Time Resolved ◽  
Chemically Induced ◽  
Kinetics Of

Kinetics of electron transfer (ET) from tyrosine (Tyr) to short-lived histidine (His) radicals in peptides of different structures was monitored using time-resolved chemically induced dynamic nuclear polarization (CIDNP) to follow...

Competition of singlet and triplet recombination of radical pairs in photoreactions of carboxy benzophenones and aromatic amino acids

2019 ◽  
Vol 21 (4) ◽  
pp. 2017-2028 ◽  
Author(s):  
Olga B. Morozova ◽  
Peter S. Sherin ◽  
Alexandra V. Yurkovskaya
Keyword(s):  
Amino Acids ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Transient Absorption ◽  
Branching Ratio ◽  
Aromatic Amino Acids ◽  
Radical Pairs ◽  
Time Resolved ◽  
Chemically Induced

Time-resolved chemically induced dynamic nuclear polarization and transient absorption were applied to reveal the branching ratio of the singlet and triplet recombination channels in the reaction of short-lived radicals of carboxy benzophenones and the aromatic amino acids.

Chemically induced dynamic nuclear polarization studies of guanosine in nucleotides, dinucleotides, and oligonucleotides

Biochemistry ◽  
1984 ◽  
Vol 23 (9) ◽  
pp. 1926-1934 ◽  
Author(s):  
Elizabeth F. McCord ◽  
Kathleen M. Morden ◽  
Arthur Pardi ◽  
Ignacio Tinoco ◽  
Steven G. Boxer
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Chemically Induced ◽  
Polarization Studies
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