C−H Direct Arylation: A Robust Tool to Tailor the π‐Conjugation Lengths of Non‐Fullerene Acceptors

Autor: Hui Liu, Yang‐Dan Tao, Li‐Hong Wang, Dong‐Nai Ye, Xu‐Min Huang, Na Chen, Chang‐Zhi Li, Shi‐Yong Liu
Rok vydání: 2022
Předmět:
Zdroj: ChemSusChem. 15
ISSN: 1864-564X
1864-5631
Popis: Facile synthesis without involvement of toxic reagents is of great significance in the practical application of photovoltaic materials. In this work, four acceptor-donor-acceptor (A-D-A) type unfused-ring acceptors (UFRAs) with stepwise extension in π-conjugation, i. e., CPFB-IC-n (n=1-4), involving cyclopentadithiophene (CPDT) and 1,4-difluorobenzene (DFB) as cores, are facilely synthesized by an atom-, step-economic and labor-saving method through direct arylation of C-H bond (DACH). Among them, CPFB-IC-4 has the longest conjugation lengths among the molecular UFRA ever reported. The dependence of optoelectronic properties and photovoltaic performances of CPFB-IC-n (n=1-4) on conjugation length were systematically investigated. CPFB-IC-2 with near zero highest occupied molecular orbital (HOMO) offsets (ΔE
Databáze: OpenAIRE
Externí odkaz: