Research output: Contribution to journal › Article › peer-review
Temperature dependence of low field CIDNP and time resolved SNP in cyclic ketones. / Dvinskikh, S. V.; Egorov, A. V.; Vieth, H. M.
In: Applied Magnetic Resonance, Vol. 12, No. 4, 01.01.1997, p. 465-476.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Temperature dependence of low field CIDNP and time resolved SNP in cyclic ketones
AU - Dvinskikh, S. V.
AU - Egorov, A. V.
AU - Vieth, H. M.
PY - 1997/1/1
Y1 - 1997/1/1
N2 - 1H CIDNP and time resolved Stimulated Nuclear Polarization (SNP) in the photolysis of 2,2,12,12-tetramethylcyclododecanone have been investigated at low magnetic field in the temperature range from -70 to +90°C. Considerable differences for protons of different reaction products are seen in the CIDNP field dependences and SNP decay times at high temperatures. For disproportion products of acyl-alkyl biradicals the width of the CIDNP field dependence and the position of the emission maximum exhibit a pronounced temperature dependence with the largest shift towards low field around -30°C. At lower temperatures a significant slowing down of the SNP decay is observed. The results are discussed in terms of a superposition of contributions from acyl-alkyl and bis(alkyl) biradicals to the nuclear spin polarization.
AB - 1H CIDNP and time resolved Stimulated Nuclear Polarization (SNP) in the photolysis of 2,2,12,12-tetramethylcyclododecanone have been investigated at low magnetic field in the temperature range from -70 to +90°C. Considerable differences for protons of different reaction products are seen in the CIDNP field dependences and SNP decay times at high temperatures. For disproportion products of acyl-alkyl biradicals the width of the CIDNP field dependence and the position of the emission maximum exhibit a pronounced temperature dependence with the largest shift towards low field around -30°C. At lower temperatures a significant slowing down of the SNP decay is observed. The results are discussed in terms of a superposition of contributions from acyl-alkyl and bis(alkyl) biradicals to the nuclear spin polarization.
UR - http://www.scopus.com/inward/record.url?scp=0031490054&partnerID=8YFLogxK
U2 - 10.1007/BF03164127
DO - 10.1007/BF03164127
M3 - Article
AN - SCOPUS:0031490054
VL - 12
SP - 465
EP - 476
JO - Applied Magnetic Resonance
JF - Applied Magnetic Resonance
SN - 0937-9347
IS - 4
ER -
ID: 48947350