A Pentacene‐based Nanotube Displaying Enriched Electrochemical and Photochemical Activities
作者:Kiyonori Kuroda、Kohei Yazaki、Yuya Tanaka、Munetaka Akita、Hayato Sakai、Taku Hasobe、Nikolai V. Tkachenko、Michito Yoshizawa
DOI:10.1002/anie.201812976
日期:2019.1.21
of the non‐conjugated, three pentacene chromophores allows the nanotube to display stepwise electrochemical/chemical oxidation characteristics. Furthermore, time‐resolved transient absorption measurements elucidated the generation of an excited triplet state of the nanotube, with high quantum yield reaching about 180 % through intramolecular singlet fission and a very long triplet lifetime.
与以前研究透彻的无环并五苯低聚物不同,据报道首次合成了具有固定管状构象的环状并五苯三聚体。从常见的并五苯醌开始的短时合成反应可制得目标分子,其长度为1.5纳米,孔洞为亚纳米。稳态光谱分析表明,非共轭三个并五苯生色团的紧密接近使纳米管显示逐步的电化学/化学氧化特性。此外,时间分辨的瞬态吸收测量结果阐明了纳米管激发三重态的产生,通过分子内单重态裂变和很高的三重态寿命,其高量子产率达到了约180%。