2001 Fiscal Year Final Research Report Summary
Development of Multi-Spin Conjugated Polymers with Large Magnetic Moment as a New Magneto-Responsible Organic Material
| Project/Area Number |
12555268
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
高分子構造・物性(含繊維)
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| Research Institution | Waseda University |
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Principal Investigator |
NISHIDE Hiroyuki Waseda University, School of Science and Engineering, Professor, 理工学部, 教授 (90120930)
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| Co-Investigator(Kenkyū-buntansha) |
MIYASAKA Makoto JSPS Research Associate, 研究員
TAKAHASHI Masahiro JSPS Research Associate, 研究員
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| Project Period (FY) |
2000 – 2001
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| Keywords | π-Conjugated Ploymer / High-spin Polymer / Magnetic Material / Magnetic Force Microscopy / Ferromagnetic Interaction / Polyphenylenevinylene / Magnetic Dot |
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| Research Abstract |
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.
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