1996 Fiscal Year Annual Research Report

液晶性と磁性を合わせもつ導電性共役系高分子の開発

Research Project

Project/Area Number	07651092
Research Category	Grant-in-Aid for Scientific Research (C)
Research Institution	University of Tsukuba
Principal Investigator	赤木和夫筑波大学, 物質工学系, 助教授 (20150964)
Co-Investigator(Kenkyū-buntansha)	白川英樹筑波大学, 物質工学系, 教授 (40016720)
Keywords	導電性高分子 / 高分子液晶 / 二置換ポリアセチレン / 磁性 / ラジカル基 / 配向制御 / 巨視的配向 / 電子スピン共鳴
Research Abstract	共役ポリエンの側鎖に液晶基と常磁性基をそれぞれ導入することができれば、液晶配向に伴って常磁性スピンをも配向させることができ、巨視的にスピンの平行配列を実現できると考えられる。本研究では、従来にない自律配向能を有する磁性高分子を開発すべく、液晶性ポリアセチレン誘導体のもう一方の側鎖に安定ラジカル基を導入することで二置換ポリアセチレン誘導体を合成した。まず、フェニルシクロヘキシル系液晶基と、フェノキシラジカル前駆体(トリメチルシリル基で保護したジタ-シャリーブチフェノール誘導体)とを置換基とする二置換アセチレンモノマーを合成し、これをメタセシス系触媒のTaCl_5-(n-Bu)_4Snを用いて重合することで、有機溶媒に可溶なポリマーを得た。さらに、保護基の脱保護および酸化の後、目的とするポリマーを得た。このポリマーは、昇温過程ではS_A相、降温過程ではS_A相および筋付扇状模様を呈するS^*_X相を示した。ESRの測定から、昇温過程の液晶相においてスピン強度の増大が観察された。今後、ラジカル基の熱安定性やスピン濃度および磁化率の温度変化を検討する必要がある。

Research Products

(17 results)

All Other

All Publications (17 results)

[Publications] K.Akagi: "Morphological Alignment of Liquid Crystalline Conducting Polyacetylene Derivatives" Macromolecular Symposia. 104. 137-158 (1996)
[Publications] K.Akagi: "Liquid Crystalline Conducting Polymers" ACS Polymer Preprints. 37. 62-63 (1996)
[Publications] K.Yoshino: "Liquid Crystalline Behaviors of Conducting Polyacetylene Derivative with Mesogenic Substituent and Its Mixture with Ferroelectric Liquid Crystal" Jpn.J.Appl.Phys.35. 3964-3970 (1996)
[Publications] Y.Aoki: "Current Progress in Synthesis of Polyacetylene Films" Synthetic Metals. (1997)
[Publications] K.Akagi: "Mutable Morphologies of Polyacetylene Films" Synthetic Metals. (1997)
[Publications] K.Sakamaki: "Relationship between Crystallinity and Electrical Conductivitiy of Highly Conducting Polyacetylene Films" Synthetic Metals. (1997)
[Publications] K.Akagi: "Ferroelectric Liquid Crystalline Conducting Polymers-Synthesis and Proreties of Polyacetylene Derivatives with Chiroptical Liquid Crystalline Groups" Synthetic Metals. (1997)
[Publications] K.Iino: "High Order Structures of Liquid Crystalline Polyacetylene Derivatives" Synthetic Metals. (1997)
[Publications] H.Goto: "Synthesis and Propeties of Photo-responsible Liquid Crystalline Polyacetylene Derivatives" Synthetic Metals. (1997)
[Publications] H.Goto: "Synthesis and Propeties of Small-Bandgap Liquid Crystalline Conjugated Polymers" Synthetic Metals. (1997)
[Publications] R.Toyoshima: "Syntheses and Properties of Poly(thienylenevinylene) Derivatives with Hexyl Groups" Synthetic Metals. (1997)
[Publications] H.Goto: "Synthesis and ESR Characterizations of Conjugated Polymers with Nitrogen Atoms" Synthetic Metals. (1997)
[Publications] G.Piao: "Spin Structures and Properties of Paramagnetic Nickel(II)Complexes with Liquid Crystalline β-Diketone Ligands" Synthetic Metals. (1997)
[Publications] K.Akagi: "Liquid Crystalline Titanocenes with Catalytic Activity for Polymerizations of Acetylene Derivatives" Synthetic Metals. (1997)
[Publications] K.Akagi(分担執筆): "The Polymeric Materials Encyclopedia.Synthesis,Properties and Applications,vol.5" CRC Press, 3669-3675 (1996)
[Publications] K.Akagi(分担執筆): "The Polymeric Materials Encyclopedia.Synthesis,Properties and Applications,Vol.8" CRC Press, 5315-5326 (1996)
[Publications] K.Akagi(分担執筆): "Electrical and Optical Polymer Systems:Fundamentals,Methods,and Applications" World Scientific Pub., (1997)

1996 Fiscal Year Annual Research Report

液晶性と磁性を合わせもつ導電性共役系高分子の開発

Principal Investigator

赤木 和夫 筑波大学, 物質工学系, 助教授 (20150964)

Research Products

[Publications] K.Akagi: "Morphological Alignment of Liquid Crystalline Conducting Polyacetylene Derivatives" Macromolecular Symposia. 104. 137-158 (1996)

[Publications] K.Akagi: "Liquid Crystalline Conducting Polymers" ACS Polymer Preprints. 37. 62-63 (1996)

[Publications] K.Yoshino: "Liquid Crystalline Behaviors of Conducting Polyacetylene Derivative with Mesogenic Substituent and Its Mixture with Ferroelectric Liquid Crystal" Jpn.J.Appl.Phys.35. 3964-3970 (1996)

[Publications] Y.Aoki: "Current Progress in Synthesis of Polyacetylene Films" Synthetic Metals. (1997)

[Publications] K.Akagi: "Mutable Morphologies of Polyacetylene Films" Synthetic Metals. (1997)

[Publications] K.Sakamaki: "Relationship between Crystallinity and Electrical Conductivitiy of Highly Conducting Polyacetylene Films" Synthetic Metals. (1997)

[Publications] K.Akagi: "Ferroelectric Liquid Crystalline Conducting Polymers-Synthesis and Proreties of Polyacetylene Derivatives with Chiroptical Liquid Crystalline Groups" Synthetic Metals. (1997)

[Publications] K.Iino: "High Order Structures of Liquid Crystalline Polyacetylene Derivatives" Synthetic Metals. (1997)

[Publications] H.Goto: "Synthesis and Propeties of Photo-responsible Liquid Crystalline Polyacetylene Derivatives" Synthetic Metals. (1997)

[Publications] H.Goto: "Synthesis and Propeties of Small-Bandgap Liquid Crystalline Conjugated Polymers" Synthetic Metals. (1997)

[Publications] R.Toyoshima: "Syntheses and Properties of Poly(thienylenevinylene) Derivatives with Hexyl Groups" Synthetic Metals. (1997)

[Publications] H.Goto: "Synthesis and ESR Characterizations of Conjugated Polymers with Nitrogen Atoms" Synthetic Metals. (1997)

[Publications] G.Piao: "Spin Structures and Properties of Paramagnetic Nickel(II)Complexes with Liquid Crystalline β-Diketone Ligands" Synthetic Metals. (1997)

[Publications] K.Akagi: "Liquid Crystalline Titanocenes with Catalytic Activity for Polymerizations of Acetylene Derivatives" Synthetic Metals. (1997)

[Publications] K.Akagi(分担執筆): "The Polymeric Materials Encyclopedia.Synthesis,Properties and Applications,vol.5" CRC Press, 3669-3675 (1996)

[Publications] K.Akagi(分担執筆): "The Polymeric Materials Encyclopedia.Synthesis,Properties and Applications,Vol.8" CRC Press, 5315-5326 (1996)

[Publications] K.Akagi(分担執筆): "Electrical and Optical Polymer Systems:Fundamentals,Methods,and Applications" World Scientific Pub., (1997)

赤木和夫筑波大学, 物質工学系, 助教授 (20150964)