EPR study of the electronic properties and weak exchange interactions in bis(L-phenylalaninamidato)Cu(II).
EPR study of the electronic properties and weak exchange interactions in bis(L-phenylalaninamidato)Cu(II).
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双(L-苯丙氨酰氨基)Cu(II)电子性质和弱交换相互作用的EPR研究。
DOI：
10.1016/s0162-0134(01)00168-4
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发表时间：
2001
影响因子：
3.9
通讯作者：
Calvo,R
中科院分区：
文献类型：
--
作者：
Casado,NM;Isaacson,RA;Calvo,R
我们在粉末和单晶样品的双（1-苯丙氨酸氨基）铜（II）（C18 H22 CuN 4 O2）进行了EPR测量。我们评估了晶体和分子g因子，并估计交换相互作用为0.15 K≤| JAB/kB|间隔6.24 μ m的铜之间≤0.32 K，通过酰胺化桥Cu-O-C-N-Cu传输。在粉末样品中观察到一种不寻常的线形，这是由结构中与晶体结构相关的分子的相对取向引起的。偶极相互作用和铜离子的层状结构产生了强烈的温度变化的光谱形状时，铜自旋被极化的外加磁场。
We performed EPR measurements in powder and single crystal samples of bis(l-phenylalaninamidato)Cu(II) (C18H22CuN4O2). We evaluated the crystal and molecular g-factors, and estimate an exchange interaction of 0.15 K≤|JAB/kB|≤0.32 K between coppers spaced apart 6.24 Å, transmitted through an amidate bridge Cu–O–C–N–Cu. An unusual line shape is observed in powder samples arising from the relative orientation of symmetry-related molecules in the structure. The dipolar interaction and the layered structure of the copper ions produce a strong temperature variation of the spectral shape when the copper spins are polarized by the applied magnetic field.