Abstract
The molecular structure of tetrakis[4-(α-diazobenzyl)pyridine]copper(II) bis(hexafluorophosphate) was revealed by X-ray structure analysis. The magnetic properties after irradiation of a 1:4 mixture of Cu(NO3)2 and 4-(α-diazobenzyl)pyridine in frozen ethanol solutions were investigated by electron paramagnetic resonance (EPR) spectrometry and magneto/susceptometry. In a randomly oriented X-band EPR spectrum, new signals appeared in the field range of 0-500 mT at the expense of the signals due to the isolated copper(II) after irradiation. All signal intensities gradually decreased on warming and new signals disappeared over 60 K. The field dependence of difference magnetization M at 2 and 5 K was measured under a condition similar to that for the EPR experiment. Fitting experiments to M vs. H/T plots by use of theoretical equations for two components suggested that a mixture of high-spin species with S = 9/2 and 7/2 in a ratio of 0.18:0.82 formed under a frozen condition.
| Original language | English |
|---|---|
| Pages (from-to) | 507-515 |
| Number of pages | 9 |
| Journal | Applied Magnetic Resonance |
| Volume | 23 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - Jan 1 2003 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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Magnetic properties after irradiation of tetrakis[4-(α-diazobenzyl)pyridine] copper(II) in a frozen solution. / Morikawa, H.; Karasawa, Satoru; Koga, Noboru.
In: Applied Magnetic Resonance, Vol. 23, No. 3-4, 01.01.2003, p. 507-515.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Magnetic properties after irradiation of tetrakis[4-(α-diazobenzyl)pyridine] copper(II) in a frozen solution
AU - Morikawa, H.
AU - Karasawa, Satoru
AU - Koga, Noboru
PY - 2003/1/1
Y1 - 2003/1/1
N2 - The molecular structure of tetrakis[4-(α-diazobenzyl)pyridine]copper(II) bis(hexafluorophosphate) was revealed by X-ray structure analysis. The magnetic properties after irradiation of a 1:4 mixture of Cu(NO3)2 and 4-(α-diazobenzyl)pyridine in frozen ethanol solutions were investigated by electron paramagnetic resonance (EPR) spectrometry and magneto/susceptometry. In a randomly oriented X-band EPR spectrum, new signals appeared in the field range of 0-500 mT at the expense of the signals due to the isolated copper(II) after irradiation. All signal intensities gradually decreased on warming and new signals disappeared over 60 K. The field dependence of difference magnetization M at 2 and 5 K was measured under a condition similar to that for the EPR experiment. Fitting experiments to M vs. H/T plots by use of theoretical equations for two components suggested that a mixture of high-spin species with S = 9/2 and 7/2 in a ratio of 0.18:0.82 formed under a frozen condition.
AB - The molecular structure of tetrakis[4-(α-diazobenzyl)pyridine]copper(II) bis(hexafluorophosphate) was revealed by X-ray structure analysis. The magnetic properties after irradiation of a 1:4 mixture of Cu(NO3)2 and 4-(α-diazobenzyl)pyridine in frozen ethanol solutions were investigated by electron paramagnetic resonance (EPR) spectrometry and magneto/susceptometry. In a randomly oriented X-band EPR spectrum, new signals appeared in the field range of 0-500 mT at the expense of the signals due to the isolated copper(II) after irradiation. All signal intensities gradually decreased on warming and new signals disappeared over 60 K. The field dependence of difference magnetization M at 2 and 5 K was measured under a condition similar to that for the EPR experiment. Fitting experiments to M vs. H/T plots by use of theoretical equations for two components suggested that a mixture of high-spin species with S = 9/2 and 7/2 in a ratio of 0.18:0.82 formed under a frozen condition.
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UR - http://www.scopus.com/inward/citedby.url?scp=0037266150&partnerID=8YFLogxK
U2 - 10.1007/BF03166638
DO - 10.1007/BF03166638
M3 - Article
AN - SCOPUS:0037266150
VL - 23
SP - 507
EP - 515
JO - Applied Magnetic Resonance
JF - Applied Magnetic Resonance
SN - 0937-9347
IS - 3-4
ER -