Function of DNA/Conducting Polymer Complex Single Molecules with Highly Ordered Structure

高度有序结构的DNA/导电聚合物复合单分子的功能

• 批准号: 17350089
• 负责人: KOBAYASHI Norihisa
• 金额: $ 8.97万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17350089/
• 关键词: Nanomaterials; Polymer Structure Property; Conjugated Polymer; Polyaniline; DNA; Single Chain; 超階層構造; Ru錯体; AFM像; ネットワーク構造; 電解伸長固定

We successfully prepared a DNA/conducting polymer complex with highly-ordered structure. The highly-ordered structure complex showed unique opt-electronic function. It was found that organic light emitting diode (OLED) was successfully demonstrated with this complex. In this research, in ordered to explore innovative function of the complex in a single macromolecular level and to apply a functional molecular wire, we analyzed the molecular structure of DNA highly ordered structure complex with AFM technique and summarized the relation between the molecular structure and electronic properties of the single macromolecular complex.Before tackling DNA/conducting polymer (polyaniline; PAn) complex, the macromolecular structure of DNA/Ru(bpy)_3^<2+> complex, where lower molar mass Ru(bpy)_3^<2+> was associated with DNA via non-covalent bond, was studied with AFM. A dilute solution of the complex was prepared and cast on mica surface flat in atomic level. From the AFM images of the DNA molecu … More les containing Ru(bpy)_3^<2+> with DNA (phosphate)/ Ru(bpy)_3^<2+> concentration ratio up to 1/1, the DNA complex molecules were entangled to each other forming network structure which could be commonly seen for plain DNA molecules. The height of each fiber was less than 1 nm, indicating the network was formed by single macromolecular DNA complex. Such a kind of networks was not observed in dye-intercalated DNA molecules which formed thick rod and cluster structure. Since DNA/Ru(bpy)_3^<2+> complex shows opt-electronic functions, DNA/Ru(bpy)32+ complex is expected to be a material for functional molecular wire.With the aim of opt-electronic functional molecular wire, bridging of DNA/Ru(bpy)_3^<2+> and DNA/PAn complex molecules between a pair of electrodes was carried out with dielectrophoretic stretching technique. It is well-known that DNA molecule can be stretched between electrodes by applying high-frequency (>1 MHz) and high-voltage (>1MV/m) ac electric fields to the DNA solution. By modifying the technique and coupling other techniques, we succeeded the bridging of DNA/Ru(bpy)_3^<2+> and DNA/PAn complex molecules between a pair of electrodes. Particularly for DNA/PAn complex, the current between electrodes under a certain bias electric field was higher in DNA/PAn complex than in plain DNA. This result clearly indicates that DNA/conducting polymer complex with highly-ordered structure has unique function in single molecular level and is a potent candidate to realize opt-electronic functional molecular wire. Less

我们成功地制备了具有高度有序结构的DNA/导电聚合物复合物。这种高度有序结构的配合物显示出独特的光电功能。结果表明，该配合物已成功地用于有机电致发光器件（OLED）。本研究以探索复合物在单个大分子水平上的创新功能和应用功能性分子导线为目的，采用原子力显微镜（AFM）技术对DNA高度有序结构复合物的分子结构进行了分析，总结了单个大分子复合物的分子结构与电子性质之间的关系，在处理DNA/导电聚合物复合物之前，首先对DNA/导电聚合物复合物的电子结构进行了表征，并对DNA/导电聚合物复合物复合物的电子结构进行了表征用原子力显微镜（AFM）研究了低摩尔质量Ru（bpy）3 ^<2+>与DNA以非共价键结合的DNA/Ru（bpy）3 ^<2+>配合物的大分子结构。制备了配合物的稀溶液，并将其浇铸在原子水平平坦的云母表面上。从DNA分子的AFM图像中， ...更多信息 当DNA（phosphate）/ Ru（bpy）_3 ^<2 +>浓度比达到1/1时，DNA络合物分子相互缠结，形成普通DNA分子常见的网络结构。每个纤维的高度小于1 nm，表明网络由单个大分子DNA复合物形成。在染料嵌入的DNA分子中没有观察到这种网络，形成了粗棒状和簇状结构。DNA/Ru（bpy）3 ^<2+>配合物具有光电功能，有望成为功能分子导线的材料，本文以构建光电功能分子导线为目标，采用介电泳拉伸技术实现了DNA/Ru（bpy）3 ^<2+>和DNA/PAn配合物分子在电极间的桥接。众所周知，通过向DNA溶液施加高频（>1 MHz）和高压（> 1 MV/m）的交流电场，DNA分子可以在电极之间拉伸。通过对该技术的改进和其他技术的联用，我们成功地实现了DNA/Ru（bpy）_3^<2+>和DNA/PAn络合物分子在一对电极之间的桥接。特别是对于DNA/PAn复合物，在一定的偏置电场下，DNA/PAn复合物中的电极间电流高于普通DNA。这一结果表明，DNA/导电高分子复合物具有高度有序的结构，在单分子水平上具有独特的功能，是实现光电功能分子导线的有力候选者。少

项目成果

フルカラー電子ペーパーを目指すエレクトロクロミック方式

针对全彩电子纸的电致变色方法

• 期刊: 日本画像学会誌 (In press)
• 作者: 小林範久;浦野 光
• 通讯作者: 浦野 光

EL Emission Mechanism of DNA Highly Ordered Complex Containing Ru Complex

含Ru配合物的DNA高度有序配合物的EL发射机制

• 发表时间: 2006
• 期刊: Evolving Organic Semiconductor (book)
• 作者: Norihisa KOBAYASHI;他;Norihisa KOBAYASHI 他;Norihisa KOBAYASHI
• 通讯作者: Norihisa KOBAYASHI

Structure and optoelectrical properties of photopolymerized PAn/DNA complex(invite)

光聚合PAn/DNA复合物的结构与光电性能（邀请）

• 发表时间: 2007
• 作者: S.YAMAGUCHI;I.YOSHEIMURA;T.KOHIRA;S.TAMARU;I.HAMACHI;Norihisa KOBAYASHI
• 通讯作者: Norihisa KOBAYASHI

最新機能性色素大全集(分担)

最新功能染料全集（分享）

• 发表时间: 2006
• 作者: Norihisa;KOBAYASHI;小林範久;小林 範久;小林範久;小林範久
• 通讯作者: 小林範久

Structure and optoelectrical properties of photppolymerized PAn/DNA complex(invite)

光聚合PAn/DNA复合物的结构和光电性能（邀请）

• 发表时间: 2007
• 作者: Norihisa KOBAYASHI;et. al.;Norihisa KOBAYASHI;Norihisa Kobayashi;Takashi Karatsu;Norihisa Kobayashi;Norihisa KOBAYASHI;Norihisa KOBAYASHI;Norihisa KOBAYASHI
• 通讯作者: Norihisa KOBAYASHI