Development of Organic Ferromagnets Based on Transition Metal Phthalocyanines

基于过渡金属酞菁的有机铁磁体的开发

• 批准号: 22760531
• 负责人: HONDA Zentaro
• 金额: $ 2.58万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760531/
• 关键词: 有機磁性体; フタロシアニン; 機能材料; 有機磁性; 高キュリー温度; 分子磁性体; 室温強磁; 室温強磁性; 有機磁性体; フタロシアニン; 機能材料; 有機磁性; 高キュリー温度; 分子磁性体; 室温強磁; 室温強磁性

A series of organic ferromagnetic materials based on transition metal phthalocyanines (MPcs) doped by alkaline metals are synthesized and the magnetic properties and the crystal structures are investigated. All the samples of MPc, where M=Mn, Fe, Co, Ni, doped by sodium or potassium, show ferromagnetic behavior at room temperature. X-ray diffraction patterns and transmission electron microscopy images suggest that the MPc molecules form three-dimensional random networks in the alkaline metal doped MPc samples. Three-dimensional ferromagnetic interactions between transition metal ions in connected MPc molecules via delocalized π-electrons are proposed to explain the high Curie temperature well above room temperature. We also synthesized the MPc polymers and studied its structure and magnetic properties. Ferromagnetic behavior is also observed in the magnetization measurements at room temperature. These experimental results could be a clue to finding high Curie temperature ferromagnetism in organic materials.

合成了一系列基于过渡金属金属金属金属掺杂的有机铁磁材料（MPC），并研究了磁性和晶体结构。 MPC的所有样品，其中M = M = Mn，Fe，Co，Ni，由钠或钾掺杂，在室温下显示铁磁行为。 X射线衍射模式和透射电子显微镜图像表明，MPC分子在酒精金属掺杂的MPC样品中形成三维随机网络。提出了通过离域的π电子连接的MPC分子中过渡金属离子之间的三维铁磁相互作用，以解释高于室温的高质体温度。我们还合成了MPC聚合物并研究其结构和磁性。在室温下的磁化测量中也观察到铁磁行为。这些实验结果可能是在有机材料中发现居里温度高的铁磁性的线索。