Magnetic properties after irradiation of tetrakis[4-(alpha-diazobenzyl)pyridine]copper(II) in a frozen solution

Morikawa H.; Karasawa S.; Koga N.

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Magnetic properties after irradiation of tetrakis[4-(alpha-diazobenzyl)pyridine]copper(II) in a frozen solution

机译：冷冻溶液中四[4-（α-重氮苄基）吡啶]铜（II）辐射后的磁性

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The molecular structure of tetrakis[4-(alpha-diazobenzyl)pyridinelcopper(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-(alpha-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. HIT 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. [References: 26]

机译：通过X射线结构分析揭示了四[4-（α-重氮苄基）吡啶铜（II）双（六氟磷酸盐）的分子结构。通过电子顺磁共振（EPR）光谱和磁/磁化法研究了Cu（NO3）（2）和4-（α-重氮苄基）吡啶的1：4混合物在冷冻乙醇溶液中辐照后的磁性。在随机定向的X波段EPR频谱中，新信号出现在0-500 mT的磁场范围内，但由于辐射后分离出的铜（II）而使信号损失。随着温度的升高，所有信号强度逐渐降低，在60 K以上时，新信号消失。在与EPR实验相似的条件下，测量2和5 K时差磁化强度M的场依赖性。通过使用两个成分的理论方程对M对HIT曲线进行拟合实验，表明在冷冻条件下以0.18：0.82的比例形成了S = 9/2和7/2的高旋转物种的混合物。 [参考：26]

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《Applied Magnetic Resonance》 |2003年第4期|共9页
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Morikawa H.; Karasawa S.; Koga N.;
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正文语种 eng
中图分类电磁学、电动力学;
关键词
Metal-ions; Photochemical formation; Ground-state; Complexes; Ligands; Bis(hexafluoroacetylacetonato)copper(ii); Diazodi(4-pyridyl)methane; Pyridine; Exchange; Systems;

机译：金属离子;光化学形成;基态;络合物;配体;双（六氟乙酰丙酮）铜（ii）;重氮二（4-吡啶基）甲烷;吡啶;交换;体系;

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1. Magnetic properties after irradiation of tetrakis[4-(alpha-diazobenzyl)pyridine]copper(II) in a frozen solution [J] . Morikawa H., Karasawa S., Koga N. Applied Magnetic Resonance . 2003,第3a4期

机译：冷冻溶液中四[4-（α-重氮苄基）吡啶]铜（II）辐射后的磁性
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Magnetic properties after irradiation of tetrakis[4-(alpha-diazobenzyl)pyridine]copper(II) in a frozen solution

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