Recently, a method to calculate the absorption and circular dichroism (CD) spectra based on the exciton coupling has been developed. In this work, the method was utilized for the decomposition of the CD and circularly polarized luminescence (CPL) spectra of a multichromophoric system into chromophore contributions for recently developed through‐space conjugated oligomers. The method which has been implemented using rotatory strength in the velocity form and therefore it is gauge‐invariant, enables us to evaluate the contribution from each chromophoric unit and locally excited state to the CD and CPL spectra of the total system. The excitonic calculations suitably reproduce the full calculations of the system, as well as the experimental results. We demonstrate that the interactions between electric transition dipole moments of adjacent chromophoric units are crucial in the CD and CPL spectra of the multichromophoric systems, while the interactions between electric and magnetic transition dipole moments are not negligible. © 2018 Wiley Periodicals, Inc.

中文翻译：

---

多发色系统圆二色性和圆偏振发光的 Frenkel-激子分解分析

最近，已经开发了一种基于激子耦合计算吸收和圆二色性 (CD) 光谱的方法。在这项工作中，该方法被用于将多发色系统的 CD 和圆偏振发光 (CPL) 光谱分解为最近开发的空间共轭低聚物的发色团贡献。该方法使用速度形式的旋转强度实现，因此它是规范不变的，使我们能够评估每个发色单元和局部激发态对整个系统的 CD 和 CPL 光谱的贡献。激子计算适当地再现了系统的完整计算以及实验结果。我们证明了相邻发色单元的电跃迁偶极矩之间的相互作用在多发色系统的 CD 和 CPL 光谱中至关重要，而电和磁跃迁偶极矩之间的相互作用不可忽略。© 2018 Wiley Periodicals, Inc.