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。这种高度有序的结构复合物表现出独特的光电功能。人们发现，用这种配合物成功地展示了有机发光二极管（OLED）。本研究为了探索复合物在单一大分子水平上的创新功能，并应用功能性分子线，利用AFM技术分析了DNA高度有序结构复合物的分子结构，总结了单一大分子复合物的分子结构与电子性质之间的关系。 用AFM研究了DNA/Ru(bpy)_3^<2+>复合物的结构，其中较低摩尔质量的Ru(bpy)_3^<2+>通过非共价键与DNA结合。制备该络合物的稀溶液并以原子水平平坦地浇铸在云母表面上。从含有 Ru(bpy)_3^<2+> 的 DNA 分子的 AFM 图像来看，DNA（磷酸盐）/ Ru(bpy)_3^<2+> 浓度比高达 1/1，DNA 复合物分子相互纠缠在一起，形成普通 DNA 分子常见的网络结构。每根纤维的高度小于1 nm，表明该网络是由单个大分子DNA复合物形成的。这种网络在插入染料的DNA分子中没有观察到，形成粗棒状和簇状结构。由于DNA/Ru(bpy)_3^<2+>复合物表现出光电功能，DNA/Ru(bpy)32+复合物有望成为功能分子线的材料。以光电功能分子线为目标，通过在一对电极之间桥接DNA/Ru(bpy)_3^<2+>和DNA/PAn复合物分子 介电泳拉伸技术。众所周知，通过向 DNA 溶液施加高频（>1 MHz）和高压（>1MV/m）交流电场，DNA 分子可以在电极之间拉伸。通过修改技术并结合其他技术，我们成功地在一对电极之间桥接DNA/Ru(bpy)_3^<2+>和DNA/PAn复合物分子。特别是对于DNA/PAn复合物，在一定偏压电场下，DNA/PAn复合物中电极之间的电流高于普通DNA。这一结果清楚地表明，具有高度有序结构的DNA/导电聚合物复合物在单分子水平上具有独特的功能，是实现光电功能分子线的潜在候选者。较少的

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