Electron spin resonance study of the photo-induced phase transition in the spin-crossover complex
Electron spin resonance study of the photo-induced phase transition in the spin-crossover complex
复制标题
自旋交叉复合物中光致相变的电子自旋共振研究
DOI：
10.1016/s0022-2313(01)00388-x
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发表时间：
2001
影响因子：
3.6
通讯作者：
Koichiro Tanaka
中科院分区：
文献类型：
--
作者：
M. Shirai;N. Yonemura;T. Tayagaki;K. Kan’no;Koichiro Tanaka
通过监测杂质 Co2+ 离子的 ESR 信号，研究了自旋交叉络合物 [FeII(2-pic)3]Cl2EtOH 中的光诱导相变 (PIPT)。确定4K低温相Co2+离子的g张量主值为gxx=2.1、gyy=2.6和gzz=7.1。与 Fe2+ 离子 (532nm) 的 d-d 跃迁共振的光照射导致 gzz 从 7.1 变为 7.35。光诱导信号的强度表现出对照射时间的非线性依赖性。这些结果表明，通过 PIPT，Co2+ 离子上的晶体场将接近立方对称的晶体场。
The photo-induced phase transition (PIPT) in the spin-crossover complex, [FeII(2-pic)3]Cl2EtOH, has been investigated by monitoring the ESR signals of impurity Co2+ions. The principal values of the g-tensor of Co2+ions in the low temperature phase at 4K were determined as gxx=2.1, gyy=2.6 and gzz=7.1. The light irradiation resonant to the d–d transition of Fe2+ions (532nm) causes the change of gzzfrom 7.1 to 7.35. The intensity of the photo-induced signal exhibits nonlinear dependence on the irradiation time. These results suggest that the crystal field on a Co2+ion would approach to that of cubic symmetry by PIPT.