Development of Multi-layered Polymer Thin Films Bearing Structural Polarization and Application as Photoinduced Optical Effect Materials

具有结构偏振的多层聚合物薄膜的研制及其作为光致光学效应材料的应用

• 批准号: 10555330
• 负责人: ITO Shinzaburo
• 金额: $ 8.38万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555330/
• 关键词: Multi-Layered Film; Polymer; Nanostructure; Polarization; Photoinduced Optical Effect; Adsorption; Non-linear Optics Dye; Charge Transfer; 積層膜; 積層薄

This research project is concerned with the development of multi-layered polymer thin films prepared by alternate adsorption of electronically donating and accepting polymers on solid substrates through charge transfer interaction. The obtained films were expected to have structural polarization inside because of the inhomogeneous distribution of partial charges formed in the charge transfer complex, which has potential feasibility as novel photo-functional material in combination with non-linear optic dyes. The multi-layer films could be fabricated from copolymers of the donating carbazole monomer and the nonlinear optic dye (DR1) up to a DR1 content of 30%. The obtained film showed strong second harmonic generation for the incident YAG laser beam of 1064 nm. The attractive charge transfer force operating at the surface induced preferential orientation of DR1 moieties, and the mechanism of adsorption was also revealed by surface plasmon measurements for various polymer samples. In addition to these materials, we investigated spatial distribution of photo-ejected electrons in multi-layered films, where the distribution of electrons was controlled with the layer structure of donor and acceptor layers prepared by the LB method. We also studied the dynamic orientation of polymer side chains in ferroelectric liquid crystal polymers. These all are having structural polarization in the thin films and showing strong interactions with an external electric field or the internal field produced by the structure itself. These results showed the wide range of abilities of nano-structured materials having structural polarization in molecular level.

该研究项目涉及通过电荷转移相互作用在固体基质上交替吸附电子给予和接受聚合物而制备的多层聚合物薄膜的开发。由于电荷转移复合物中形成的部分电荷分布不均匀，所获得的薄膜预计内部具有结构偏振，这与非线性光学染料结合作为新型光功能材料具有潜在的可行性。多层膜可以由供体咔唑单体和非线性光学染料 (DR1) 的共聚物制成，DR1 含量高达 30%。所获得的薄膜对于 1064 nm 的入射 YAG 激光束表现出强烈的二次谐波。在表面作用的吸引电荷转移力诱导 DR1 部分的择优取向，并且通过对各种聚合物样品的表面等离子体测量也揭示了吸附机制。除了这些材料之外，我们还研究了多层薄膜中光发射电子的空间分布，其中电子的分布是通过LB方法制备的施主层和受主层的层结构来控制的。我们还研究了铁电液晶聚合物中聚合物侧链的动态取向。这些薄膜都具有结构极化，并与外部电场或结构本身产生的内部场表现出强烈的相互作用。这些结果显示了具有分子水平结构极化的纳米结构材料的广泛能力。

项目成果

伊藤紳三郎: "季刊 化学総説 「無機有機ナノ複合物質」"学会出版センター. 196 (1999)

Shinzaburo Ito：“化学季刊‘无机-有机纳米复合材料’”学会出版中心196（1999）。

大北英生: "二光子励起による放出電子の空間分布"光化学. 31. 84-91 (2000)

Hideo Ohkita：“双光子激发引起的发射电子的空间分布”光化学 31. 84-91 (2000)。

Yuzuru Shimazaki, Masaya Mitsuishi, Shinzaburo Ito, and Masahide Yamamoto: "Alternate Adsorption of Polymers on a Gold Surface through the Charge-Transfer Interaction"Macromolecules. 32. 8220-8223 (1999)

Yuzuru Shimazaki、Masaya Mitsuishi、Shinzaburo Ito 和 Masahide Yamamoto：“通过电荷转移相互作用在金表面上交替吸附聚合物”大分子。

Y.Shimazaki: "Molecular Weight Dependence of Alternate Adsorption through Charge Transfer Interaction"Langmuir. 17. 953-956 (2001)

Y.Shimazaki：“通过电荷转移相互作用交替吸附的分子量依赖性”Langmuir。

Y.Shimazaki: "Alternate Adsorption of Polymers on a Gold Surface through the Charge-Transfer Interaction"Macromolecules. 32・24. 8220-8223 (1999)

Y. Shimazaki：“通过电荷转移相互作用在金表面上交替吸附聚合物”32・24（1999）。