Xiong Wenjuan, Du Lili, Lo Kin Cheung, Shi Haiting, Takaya Tomohisa, Iwata Koichi, Chan Wai Kin, Phillips David Lee
Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China.
Department of Chemistry, Faculty of Science , Gakushuin University , 1-5-1 Mejiro , Toshimaku, Tokyo 171-8588 , Japan.
J Phys Chem Lett. 2018 Jul 19;9(14):3819-3824. doi: 10.1021/acs.jpclett.8b01713. Epub 2018 Jun 28.
Conjugated polymers incorporated with cycloplatinated complexes (P1-Pt and P2-Pt) were used as dispersants for single-walled carbon nanotubes (SWCNTs). Significant changes in the UV-vis absorption spectra were observed after the formation of the polymer/SWCNT hybrids. Molecular dynamics (MD) simulations revealed the presence of a strong interaction between the cycloplatinated complex moieties and the SWCNT surface. The photoinduced electron transfer processes in these hybrids were strongly dependent on the type of the comonomer unit. Upon photoexcitation, the excited P1-Pt donates electrons to the SWCNT, while P2-Pt accepts electrons from the photoexcited SWCNT. These observations were supported by results from Raman and femtosecond time-resolved transient absorption spectroscopy experiments. The strong electronic interaction between the Pt complexes and the SWCNT gives rise to a new hybrid system that has a controllable photoinduced electron transfer flow, which are important in regulating the charge transport processes in SWCNT-based optoelectronic devices.
结合了环铂配合物的共轭聚合物（P1-Pt和P2-Pt）被用作单壁碳纳米管（SWCNT）的分散剂。聚合物/SWCNT杂化物形成后，紫外-可见吸收光谱发生了显著变化。分子动力学（MD）模拟表明环铂配合物部分与SWCNT表面之间存在强相互作用。这些杂化物中的光致电子转移过程强烈依赖于共聚单体单元的类型。光激发时，激发态的P1-Pt将电子转移给SWCNT，而P2-Pt则从光激发的SWCNT接受电子。拉曼光谱和飞秒时间分辨瞬态吸收光谱实验结果支持了这些观察结果。Pt配合物与SWCNT之间的强电子相互作用产生了一种新型杂化体系，其具有可控的光致电子转移流，这对于调节基于SWCNT的光电器件中的电荷传输过程非常重要。
