线性和角形形状的纳夫托迪烯:选择性合成,特性,以及对有机场效应晶体管的应用
Shoji Shinamura1, Itaru Osaka, Eigo Miyazaki
1Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
Journal of the American Chemical Society
|March 11, 2011
概括
研究人员开发了一种新的合成纳夫托迪烯 (NDTs),关键的有机半导体构建块. 分子形状和对称性显著影响电子特性和晶体管性能,线性无线核试验显示出有前途.
科学领域:
- 有机电子学有机电子学
- 材料科学是一种材料科学.
- 合成化学 合成化学
背景情况:
- 有机半导体对于先进的电子设备至关重要.
- 纳二烯 (NDT) 为这些材料提供了潜在的核心结构.
- 控制分子形状和对称性是优化半导体性能的关键.
研究的目的:
- 为线性和角性纳夫托迪烯 (NDT) 开发一种简单的合成途径.
- 调查分子形状和对称性对无线核试验的电子和光学特性的影响.
- 评估NDT衍生物在有机场效应晶体管 (OFET) 中的性能.
主要方法:
- 化学选择性的索诺加希拉合反应,用于选择性地功能化纳烯核.
- 简单的环闭反应形成化-thiophene环.
- 电化学,光学和薄膜晶体管 (TFT) 的性能测量.
主要成果:
- 成功合成了三种同位体NDT:纳夫托[2,3-b:6,7-b']二烯,纳夫托[2,3-b:7,6-b']二烯和纳夫托[2,1-b:6,5-b']二烯.
- 与角形的相比,线性形状的NDT表现出较低的氧化潜力和红移吸收.
- 中心对称的NDT衍生品在OFET中实现了比轴对称的电荷载体更高的电荷载体移动性 (高达1.5cm2V-1s-1),而不是轴对称的电荷载体 (∼0.06cm2V-1s-1).
结论:
- 开发的合成策略提供了对各种NDT异构体的选择性访问.
- 分子形状决定了电子结构,而对称性则决定了固态包装和电荷传输.
- 线性,中心对称的naphtho[2,3-b:6,7-b']dithiophene是高性能有机半导体的一个非常有前途的构建模块.
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