Department of Chemistry, New York University, New York, New York 10003, United States.
Micron School for Materials Science and Engineering and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States.
ACS Nano. 2022 Jan 25;16(1):1301-1307. doi: 10.1021/acsnano.1c09143. Epub 2022 Jan 3.
A chiral dimer of an organic semiconductor was assembled from octaniline (octamer of polyaniline) conjugated to DNA. Facile reconfiguration between the monomer and dimer of octaniline-DNA was achieved. The geometry of the dimer and the exciton coupling between octaniline molecules in the assembly was studied both experimentally and theoretically. The octaniline dimer was readily switched between different electronic states by protonic doping and exhibited a Davydov splitting comparable to those previously reported for DNA-dye systems employing dyes with strong transition dipoles. This approach provides a possible platform for studying the fundamental properties of organic semiconductors with DNA-templated assemblies, which serve as candidates for artificial light-harvesting systems and excitonic devices.
一种手性有机半导体二聚体是由与 DNA 连接的八苯胺（聚苯胺的八聚体）组装而成的。实现了八苯胺-DNA 单体和二聚体之间的简便重排。通过实验和理论研究了二聚体的几何形状以及组装体中八苯胺分子之间的激子耦合。八苯胺二聚体通过质子掺杂很容易在不同的电子态之间切换，并表现出与以前报道的具有强跃迁偶极子的染料的 DNA-染料系统相当的 Davydov 分裂。该方法为使用 DNA 模板组装体研究有机半导体的基本性质提供了一个可能的平台，这些组装体可用作人工光捕获系统和激子器件的候选材料。
