Panchromatic molecules, e. g. organic small molecules with wide absorption spectra, are very desirable for solar energy‐related applications. Here, we report the development of a series of organoboron compounds composed of an organoboron core unit, two π‐bridging units and two electron‐withdrawing end‐capping units. All seven molecules have the HOMO localized on the core unit and the LUMO delocalized on the whole conjugated backbone. They exhibit wide absorption spectra consisting of two strong absorption bands with the full width at half maximum of ca. 280 nm. These panchromatic compounds can be used as electron acceptors in organic solar cells. We elucidate the relationship between the chemical structures and opto‐electronic properties of these organoboron panchromatic compounds. Increasing the electron‐withdrawing capability of the core units results in a downshifted HOMO level as well as blueshifted long‐wavelength absorption band with increased extinction coefficient. Extending the π‐bridging units causes an increased HOMO level and blueshifted long‐wavelength absorption band with increased extinction coefficients. Weakening the electron‐withdrawing capability of the end‐capping units leads to an upshifted LUMO level and blueshifted long‐wavelength absorption peak with decreased extinction coefficient. This work provides insight into the absorption spectrum manipulation of panchromatic molecules and would pave the way for the development of solar energy‐related applications.

中文翻译：

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具有可调吸收光谱的全色Organoboron分子。

全色分子，例如 G。具有宽吸收光谱的有机小分子非常适合与太阳能相关的应用。在这里，我们报告了一系列由有机硼核心单元，两个π桥单元和两个吸电子封端单元组成的有机硼化合物的开发。所有七个分子的HOMO都位于核心单元上，而LUMO则位于整个共轭骨架上。它们显示出由两个强吸收带组成的宽吸收光谱，其整个宽度约为ca的一半。280纳米 这些全色化合物可以用作有机太阳能电池中的电子受体。我们阐明了这些有机硼全色化合物的化学结构与光电性能之间的关系。核心单元的吸电子能力提高，导致消光系数降低，HOMO能级降低，长波长吸收谱带蓝移。扩展π桥单元会导致HOMO能级增加，并且消光系数会增加，蓝移的长波长吸收带会增加。末端封端单元的吸电子能力减弱，导致消光系数降低，LUMO能级上移，长波长吸收峰蓝移。