Development of Multi-Spin Conjugated Polymers with Large Magnetic Moment as a New Magneto-Responsible Organic Material

开发具有大磁矩的多自旋共轭聚合物作为新型磁响应有机材料

• 批准号: 12555268
• 负责人: NISHIDE Hiroyuki
• 金额: $ 7.68万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555268/
• 关键词: π-Conjugated Ploymer; High-spin Polymer; Magnetic Material; Magnetic Force Microscopy; Ferromagnetic Interaction; Polyphenylenevinylene; Magnetic Dot

π-Conjugated but non-Kekule-type polymers behave as a multi-spin organics with large molecular-based magnetic moment, and respond magnetically. The objective of this research is to characterize these multi-spin conjugated polymers as a magneto-responsible but purely organic material. Linear, star-shaped, and hyperbranched poly(4-phenoxyl- or - diphenylaminium-1,2-phenylenevinylene)s were synthesized. Atomic force and magnetic force microscopy were applied to monitor the molecular image and the weak magnetic image of these polymers. Magnetic response in the magnetic force microscopy exactly corresponded to spin density, size and shape of the polymer at a single-molecular level. It is concluded that magnetic force microscopy is an effective tool to detect a very weak magnetic signal of such multi-spin organic polymers and that the polymer molecule is a potentially new material of nanometer-sized and molecular-based magnetic dots.

π共轭非凯库勒型聚合物是一种具有大分子磁矩的多自旋有机物，具有磁性响应。本研究的目的是将这些多自旋共轭聚合物表征为磁响应但纯有机材料。合成了线型、星型和超支化的聚（4-苯氧基-或-二苯基铵-1，2-亚苯基亚乙烯基）。应用原子力显微镜和磁力显微镜对聚合物的分子图像和弱磁图像进行了监测。磁力显微镜中的磁响应在单分子水平上与聚合物的自旋密度、尺寸和形状完全对应。结果表明，磁力显微镜是检测多自旋有机聚合物微弱磁信号的有效工具，聚合物分子是一种潜在的纳米级分子基磁点新材料。

项目成果

Nishide et al.: "A Nanometer-Sized High-Spin Polyradical : Poly(4-phenoxyl-1,2-phenylenevinylene) Planarily Extended in a Non-Kekule Fashion and its Magnetic Force Microscopic Images"J.Am.Chem.Soc.. 123. 5942-5946 (2001)

Nishide 等人：“纳米级高自旋多自由基：以非凯库勒方式平面延伸的聚（4-苯氧基-1,2-亚苯基亚乙烯基）及其磁力显微图像”J.Am.Chem.Soc。

Nishide et al.: "Electrochemical and Ferromagnetic Couplings in 4,4',4''-(1,3,5-Benzenetriyl) tris (phenoxyl) Radical Formation"J.Org.Chem.. 66(印刷中). (2001)

Nishide 等人：“4,4,4-(1,3,5-苯三基)三(苯氧基)自由基形成中的电化学和铁磁耦合”J.Org.Chem.. 66（印刷中）。 ）

Nishide et al.: "Electrochemical and Ferromagnetic Couplings in 4,4′,4″-(1,3,5-Benzenetriyl)tris(phenoxyl) Radical Formation"J.Org.Chem.. 66. 1680-1685 (2001)

Nishide 等人：“4,4,4”-(1,3,5-Benzenetriyl)tris(phenoxyl) Radical Formation 中的电化学和铁磁耦合”J.Org.Chem.. 66. 1680-1685 (2001)

Nishide et al.: "Synthesis and Magnetic, Optoelectronic Properties of Poly(triphenylamine-alt-phenylenevinylene)s"J. Polym. Soc. Part A. Polym. Chem.. 38. 4119-4127 (2000)

Nishide 等人：“聚（三苯胺-交替亚苯基亚乙烯基）的合成及其磁、光电性质”J。

Nishide et al.: "5,4′-Bis[bis(methoxyphenyl)amino]-2-methoxystilbene and its Cationic Biradical"Polyhedron. 20. 1147-1150 (2001)

Nishide 等人：“5,4-双[双(甲氧基苯基)氨基]-2-甲氧基芪及其阳离子双自由基”多面体。