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首页> 外文期刊>Advanced Functional Materials >Controlling the Functional Properties of Oligothiophene Crystalline Nano/Microfibers via Tailoring of the Self-Assembling Molecular Precursors
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Controlling the Functional Properties of Oligothiophene Crystalline Nano/Microfibers via Tailoring of the Self-Assembling Molecular Precursors

机译：通过裁缝自组装分子前体控制寡聚噻吩晶体纳米/微纤维的功能特性。

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Oligothiophenes are -conjugated semiconducting and fluorescent molecules whose self-assembly properties are widely investigated for application in organic electronics, optoelectronics, biophotonics, and sensing. Here an approach to the preparation of crystalline oligothiophene nano/microfibers is reported based on the use of a sulfur overrich quaterthiophene building block, T4S4 , containing in its covalent network all the information needed to promote the directional, - stacking-driven, self-assembly of Y-T4S4-Y oligomers into fibers with hierarchical supramolecular arrangement from nano- to microscale. It is shown that when Y varies from unsubstituted thiophene to thiophene substituted with electron-withdrawing groups, a wide redistribution of the molecular electronic charge takes place without substantially affecting the aggregation modalities of the oligomer. In this way, a structurally comparable series of fibers is obtained having progressively varying optical properties, redox potentials, photoconductivity, and type of prevailing charge carriers (from p- to n-type). With the aid of density functional theory (DFT) calculations, combined with powder X-ray diffraction data, a model accounting for the growth of the fibers from molecular to nano- and microscale is proposed.%1801946.1-1801946.15
机译：寡聚噻吩是共轭的半导体和荧光分子，其自组装特性被广泛研究用于有机电子，光电，生物光子学和传感领域。此处报道了一种基于结晶的低聚噻吩纳米/微纤维的制备方法，该方法基于使用了硫含量过高的四噻吩结构单元T4S4，该结构单元的共价网络包含促进定向，堆叠驱动，自组装的所有信息。 Y-T4S4-Y低聚物形成具有从纳米级到微米级的层级超分子排列的纤维。结果表明，当Y从未取代的噻吩变为被吸电子基团取代的噻吩时，分子电子电荷发生了广泛的重新分布，而基本上不影响低聚物的聚集形式。以此方式，获得了结构上可比的纤维系列，其具有逐渐变化的光学性质，氧化还原电势，光电导性和主要的载流子类型（从p型到n型）。借助密度泛函理论（DFT）的计算，结合粉末X射线衍射数据，提出了一个解释纤维从分子级到纳米级和微米级增长的模型。％1801946.1-1801946.15

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