六基化稳定了原型低频段间隙共聚物PCDTBT中扭曲的脊柱配置
Sebastian Stäter1, Erik F Woering1, Florian Lombeck2,3
1University of Groningen, Zernike Institute for Advanced Materials, 9747AG, Groningen, Netherlands.
概括
像PCDTBT这样的结合供体-受体共聚合物的侧链可以扭曲脊柱,但也可以稳定它. 脊柱上的化学缺陷对单链电子特性的影响最小.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 有机电子 有机电子
背景情况:
- 结合的供体-受体共聚物由于其可调节的带隙,对有机电子有很大的希望.
- 了解分子结构对光物理性质的影响对于设备优化至关重要.
- 侧链和缺陷对单个聚合物链的影响尚不清楚.
研究的目的:
- 研究侧链密度和骨干缺陷如何影响联共聚物质的光物理和形状性质.
- 用先进的光谱学探索单个聚合物链的行为.
主要方法:
- 采用室温单分子光发光学 (PL) 光谱.
- 研究了基于原型共聚合物的四种化合物,包括聚[N-9''-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole) ] (PCDTBT).
- 系统地改变了化学结构,专注于六链密度和同质合缺陷.
主要成果:
- 西醇 (BT) 共同体上增加的六基链密度会导致更扭曲的分子构造,其特征是二面角增加.
- 尽管背骨扭曲增加,但侧链似乎稳定了扭曲的形状.
- 沿着聚合物骨干的同合缺陷对单链光发光谱和链内电子特性的影响微不足道.
结论:
- 侧链工程显著影响联共聚合物的构成.
- 侧链对扭曲形状的稳定作用是材料设计的一个关键发现.
- 链内电子属性对常见的骨干缺陷,如同质合,具有强大的抵抗力.
相关概念视频
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01:24π Molecular Orbitals of 1,3-Butadiene
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01:28Stability of Conjugated Dienes
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Introduction
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