苝
光化学
接受者
噻吩
超快激光光谱学
循环伏安法
化学
电子受体
吸收光谱法
激发态
电子供体
电化学
电子转移
光谱学
分子
物理化学
有机化学
电极
催化作用
核物理学
物理
量子力学
凝聚态物理
作者
Kevin Bold,Matthias Stolte,Kazutaka Shoyama,Ana‐Maria Krause,Alexander Schmiedel,Marco Holzapfel,Christoph Lambert,Frank Würthner
标识
DOI:10.1002/chem.202200355
摘要
Abstract A series of donor‐acceptor (D−A) macrocyclic dyads consisting of an electron‐poor perylene bisimide (PBI) π‐scaffold bridged with electron‐rich α‐oligothiophenes bearing four, five, six and seven thiophene units between the two phenyl‐imide substituents has been synthesized and characterized by steady‐state UV/Vis absorption and fluorescence spectroscopy, cyclic and differential pulse voltammetry as well as transient absorption spectroscopy. Tying the oligothiophene strands in a conformationally fixed macrocyclic arrangement leads to a more rigid π‐scaffold with vibronic fine structure in the respective absorption spectra. Electrochemical analysis disclosed charged state properties in solution which are strongly dependent on the degree of rigidification within the individual macrocycle. Investigation of the excited state dynamics revealed an oligothiophene bridge size‐dependent fast charge transfer process for the macrocyclic dyads upon PBI subunit excitation.
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