ESR Spectrometry

Electron Spin Resonance (ESR) spectrometry is an analytical method to observe and measure absorbed energy on irradiation of the microwave to the radicals in a strong magnetic field. Recently, the function of active oxygen species, such as the hydroxyl radical and super oxide in vivo, has attracted attention. These radicals can be studied by the ESR spectrometry. Generally, these radicals are unstable, but when they are first reacted with a spin trapping reagent, they can be trapped and stabilized. On the other hand, with use of a spin labeling reagent, the molecules without radicals can also be measured with ESR.

Spin Trapping Reagents

Spin Labels

Spin Trapping Reagents

B1701 B1701 B1735 B1735 D3068 D3068
D2362 D2362 M1164 M1164 N0367 N0367
T1554 T1554 T1534 T1534
B1701 N-tert-Butyl-alpha-phenylnitrone
B1735 N-tert-Butyl-alpha-(4-pyridyl-1-oxide)nitrone
D3068 5-(Diethylphosphono)-5-methyl-1-pyrroline N-Oxide
D2362 5,5-Dimethyl-1-pyrroline N-Oxide
M1164 2-Methyl-2-nitrosopropane Dimer
N0367 Nitrosobenzene
T1554 3,3,5,5-Tetramethyl-1-pyrroline N-Oxide
T1534 2,4,6-Tri-tert-butylnitrosobenzene
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Spin Labels

A1348 A1348 A1343 A1343 C1428 C1428
C1406 C1406 C1432 C1432 C1782 C1782
D2399 D2399 H0865 H0865 H0878 H0878
I0487 I0487 I0486 I0486 M1197 M1197
O0266 O0266 T1560 T1560
A1348 4-Acetamido-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical [Catalyst for Oxidation]
A1343 4-Amino-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
C1428 4-Carboxy-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
C1406 3-Carboxy-2,2,5,5-tetramethylpyrrolidine 1-Oxyl Free Radical
C1432 4-(2-Chloroacetamido)-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
C1782 4-Cyano-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
D2399 16-DOXYL-stearic Acid Free Radical
H0865 4-Hydroxy-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
H0878 4-Hydroxy-2,2,6,6-tetramethylpiperidine 1-Oxyl Benzoate Free Radical [Catalyst for Oxidation]
I0487 4-(2-Iodoacetamido)-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
I0486 4-Isothiocyanato-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
M1197 4-Methoxy-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical [Catalyst for Oxidation]
O0266 4-Oxo-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical
T1560 2,2,6,6-Tetramethylpiperidine 1-Oxyl Free Radical
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