Effects of molecular architecture on morphology and photophysics in conjugated polymers: from single molecules to bulk,Chemical Science

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Effects of molecular architecture on morphology and photophysics in conjugated polymers: from single molecules to bulk
Chemical Science ( IF 7.6 ) Pub Date : 2018-01-04 00:00:00 , DOI: 10.1039/c7sc03465b
Zhongjian Hu _{1,

2,

3} , Beiyue Shao _{1,

2,

3} , Geoffrey T. Geberth _{1,

2,

3} , David A. Vanden Bout _{1,

2,

3}

Affiliation

Conjugated polymers (CPs) possess a wide range of desirable properties, including accessible energetic bandgaps, synthetic versatility, and mechanical flexibility, which make them attractive for flexible and wearable optoelectronic devices. An accurate and comprehensive understanding about the morphology–photophysics relations in CPs lays the groundwork for their development in these applications. However, due to the complex roles of chemical structure, side-chains, backbone, and intramolecular interactions, CPs can exhibit heterogeneity in both their morphology and optoelectronic properties even at the single chain level. This molecular level heterogeneity together with complicated intermolecular interactions found in bulk CP materials severely obscures the deterministic information about the morphology and photophysics at different hierarchy levels. To counter this complexity and offer a clearer picture for the properties of CP materials, we highlight the approach of probing material systems with specific structural features via single molecule/aggregate spectroscopy (SMS). This review article covers recent advances achieved through such an approach regarding the important morphological and photophysical properties of CPs. After a brief review of the typical characteristics of CPs, we present detailed discussions of structurally well-defined model systems of CPs, from manipulated backbones and side-chains, up to nano-aggregates, studied with SMS to offer deterministic relations between morphology and photophysics from single chains building up to bulk states.

中文翻译：

分子结构对共轭聚合物形态和光物理的影响：从单分子到本体

共轭聚合物（CPs）具有广泛的理想特性，包括可访问的高能带隙，合成的多功能性和机械柔韧性，这使它们对于柔性和可穿戴的光电设备具有吸引力。对CP中形态与光物理关系的准确而全面的理解为它们在这些应用中的发展奠定了基础。但是，由于化学结构，侧链，主链和分子内相互作用的复杂作用，CP甚至在单链水平上也可以表现出形态和光电特性方面的异质性。这种分子水平的异质性以及在大量CP材料中发现的复杂的分子间相互作用，严重掩盖了有关不同层次结构的形态学和光物理学的确定性信息。为了克服这种复杂性并为CP材料的特性提供更清晰的图景，我们重点介绍了探测具有特定结构特征的材料系统的方法通过单分子/聚集光谱法（SMS）。这篇综述文章涵盖了通过这种方法获得的有关CP的重要形态和光物理特性的最新进展。在简要回顾了CP的典型特征之后，我们对CP的结构良好定义的模型系统进行了详细讨论，从操纵的主干和侧链到纳米聚集体，均已通过SMS进行了研究，以提供形态学与光物理之间的确定性关系。从单一的链条发展到大块的州。

更新日期：2018-01-04

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