179485
4-Oxo-TEMPO
Synonyma:
4-Oxo-2,2,6,6-tetramethyl-1-piperidinyloxy, free radical
Přihlásitk zobrazení cen stanovených pro organizaci a smluvních cen
About This Item
Empirický vzorec (Hillův zápis):
C9H16NO2
Číslo CAS:
Molekulová hmotnost:
170.23
EC Number:
MDL number:
UNSPSC Code:
12352000
PubChem Substance ID:
NACRES:
NA.22
Doporučené produkty
![9-Azabicyclo[3.3.1]nonane N-oxyl 95%](/deepweb/assets/sigmaaldrich/product/structures/287/155/e2f4a2e1-1d4e-4bed-9187-9e16d23cbbbf/640/e2f4a2e1-1d4e-4bed-9187-9e16d23cbbbf.png)
form
solid
functional group
ketone
storage temp.
2-8°C
SMILES string
CC1(C)CC(=O)CC(C)(C)N1[O]
InChI
1S/C9H16NO2/c1-8(2)5-7(11)6-9(3,4)10(8)12/h5-6H2,1-4H3
InChI key
WSGDRFHJFJRSFY-UHFFFAOYSA-N
General description
4-Oxo-TEMPO is formed by the reaction of 2,2,6,6-tetramethyl-4-piperidone (4-oxo-TMP) and 1O2. It is a stable paramagnetic product formed during the irradiation of TiO2 in aqueous suspensions.
Application
4-Oxo-TEMPO was employed as nitroxide standard to investigate the generation of singlet oxygen by photoexcited TiO2 in ethanol by ESR spectroscopy. It may be employed as free radical polarizing agent in dynamic nuclear polarization (DNP) studies.
Free-radical nitroxide spin probe typically used for:
- Redox sources for anodes in lithium secondary batteries
- Free-radical biological studies
- Radical spin-trapping
- Electron paramagnetic resonance studies
- Polymer chemisty and synthesis applications
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Water (1)H relaxation rate measurements of (15)N-(2)H-TEMPONE solutions at temperatures ranging from 298 to 328 K have been performed as a function of magnetic field from 0.00023 to 9.4 T, corresponding to (1)H Larmor frequencies of 0.01 to 400 MHz.
Mark R Kurban et al.
The Journal of chemical physics, 129(6), 064501-064501 (2008-08-22)
Bimolecular collisions between perdeuterated 2,2,6,6-tetramethyl-4-oxopiperidine-l-oxyl molecules in three alkanes have been studied by measuring the electron paramagnetic resonance (EPR) spectral changes induced by spin exchange. We define an "encounter" to be a first-time collision followed by a series of re-encounters
R Konaka et al.
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