Temperature and Salt Addition Effect on the Micellized Radical Pairs Recombination Studied by Stimulated Nuclear Polarization

2001 ◽  
Vol 105 (19) ◽  
pp. 4640-4647 ◽  
Author(s):  
N. V. Lebedeva ◽  
E. G. Bagryanskaya ◽  
V. R. Gorelik ◽  
I. V. Koptyug ◽  
R. Z. Sagdeev
Keyword(s):  
Nuclear Polarization ◽  
Radical Pairs ◽  
Salt Addition

Chemically Induced Dynamic Nuclear Polarization

1970 ◽  
Vol 25 (12) ◽  
pp. 1963-1970 ◽  
Author(s):  
M. Lehnig ◽  
H. Fischer
Keyword(s):  
Nuclear Polarization ◽  
Hyperfine Coupling ◽  
Hyperfine Coupling Constant ◽  
Radical Pair Mechanism ◽  
Coupling Constant ◽  
Reaction Products ◽  
Radical Pairs ◽  
Alkyl Radicals ◽  
Chemically Induced ◽  
Substituted Alkanes

Abstract Alkyl radicals are generated by reactions of phenyl radicals in binary mixtures of substituted alkanes. CIDNP-NMR spectra of their reaction products are explained by S - T0-transitions in radical pairs formed in free radical encounters. From comparisons of calculated and observed CIDNP spectra the (g-factor and the proton hyperfine coupling constant of · CHCl2 are determined [g = 2.0080 ± 0.0003, a = (- 17.0 ± 1.0) G]. The inclusion of nuclear relaxation in free radicals in quantitative CIDNP treatments is discussed, and evidence for the radical pair mechanism causing CIDNP of phenyl derivatives during dibenzoylperoxide decompositions is presented.

Investigation of Micellized Radical Pairs in the Photolysis of Ketones by Time-Resolved Stimulated Nuclear Polarization*

1993 ◽  
Vol 182 (Part_1_2) ◽  
pp. 107-117 ◽  
Author(s):  
N. I. Avdievich ◽  
E. G. Bagryanskaya ◽  
V. F. Tarasov ◽  
R. Z. Sagdeev
Keyword(s):  
Nuclear Polarization ◽  
Radical Pairs ◽  
Time Resolved

scholarly journals Photo-CIDNP in Solid State

2021 ◽  
Author(s):  
Jörg Matysik ◽  
Yonghong Ding ◽  
Yunmi Kim ◽  
Patrick Kurle ◽  
Alexandra Yurkovskaya ◽  
...  
Keyword(s):  
Solid State ◽  
Dynamic Nuclear Polarization ◽  
Analytical Method ◽  
Nuclear Polarization ◽  
State Of The Art ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Radical Pairs ◽  
Chemically Induced ◽  
Angle Spinning

AbstractPhoto-CIDNP (photo-chemically induced dynamic nuclear polarization) refers to nuclear polarization created by the spin-chemical evolution of spin-correlated radical pairs (SCRPs). This phenomenon occurs in gases, liquids and solids. Based on the solid-state photo-CIDNP effect observed under magic-angle spinning (MAS), photo-CIDNP MAS NMR has been developed as analytical method. Here we report the origin, the theory and the state of the art of this method.

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.

Investigation of Micellized Radical Pairs in the Photolysis of Ketones by Time-Resolved Stimulated Nuclear Polarization*

1992 ◽  
Vol 1 (Part_2) ◽  
pp. 107-117
Author(s):  
N. I. Avdievich ◽  
E. G. Bagryanskaya ◽  
V. F. Tarasov ◽  
R. Z. Sagdeev
Keyword(s):  
Nuclear Polarization ◽  
Radical Pairs ◽  
Time Resolved
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