区域造HBC-C12H25薄膜的结构
Dag W Breiby1, Oliver Bunk, Wojciech Pisula
1Danish Polymer Centre, Risø National Laboratory, P.O. Box 49, 4000 Roskilde, Denmark. dag.werner.breiby@risoe.dk
Journal of the American Chemical Society
|August 11, 2005
概括
取代了hexa-n-dodecyl的hexa-peri-benzocoronene (HBC) 薄膜表现出一种鱼骨分子结构. 长长的十二边链形成有序的,数字交叉的域,揭示了堆叠故障的谷物边界效应.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 有机电子 有机电子
背景情况:
- 六基 (HBC) 衍生物是关键的有机半导体.
- 控制薄膜中的分子包装对于设备性能至关重要.
- 了解HBC材料中的结构属性关系是必不可少的.
研究的目的:
- 为了阐明-n-dodecyl-substituted hexa-peri-benzocoronene (HBC) 的薄膜结构. 为了阐明-n-dodecyl-substituted hexa-peri-benzocoronene (HBC) 的薄膜结构.
- 为了研究长基侧链对分子组织的影响.
- 为了将结构特征与潜在的电子属性相关联.
主要方法:
- 使用牧场发射率X射线衍射 (GIXRD) 来分析薄膜.
- 使用一个正方形单元细胞进行了结构建模.
- 在飞机上使用摇摆扫描来评估分子方向.
主要成果:
- 一个精确定义的正方形单元细胞模型,每个细胞有两个分子,准确地描述了结构.
- 分子采用鱼骨包装安排,类似于未替代的HBC.
- 分子盘的方向垂直于基板,旋转39°左右.
- 多德基尔侧链形成有序的,交数字的域.
- 芳香性HBC核心和阿里法性侧链分离成垂直领域.
- 在摇摆扫描中观察到的离散方向分布表明了粒度边界效应.
结论:
- 这项研究揭示了多德基替代HBC的高度有序的薄膜结构.
- 互数字的侧链和分离的域表明存在异构电荷传输的潜力.
- 基链堆叠缺陷可能会诱导粒度边界,影响膜形态.
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