One-Pot Synthesis of 3-to 15-Mer π-Conjugated Discrete Oligomers with Widely Tunable Optical Properties

• 作者: Hui Liu Xiao-Feng Zhang Li-Hong Wang Yan Chen Dong-Nai Ye Long Chen He-Rui Wen Shi-Yong Liu
• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Concise Reports
• 页码范围: 577-584
• 页数: 8页
• 语种: 英文
• DOI: 10.1002/cjoc.202000457

摘要

A series of all-donor type alternating (D1-D2) monodisperse oligomers based on cyclopentadithiophene (CPDT) and 1,4-difluorobenzene (DFB) with gradually increasing chain lengths containing 3 to 15 monomers were successfully synthesized via one-pot C-H direct arylation reaction.As confirmed by various structural characterizations,all these long-chain oligomers are monodispersed with defined structures.The length-dependent optical and electrochemical properties with the evolution from the shortest oligomer (O1) to the longest oligomer (O7) and their parent polymer P1 have been studied in details.By simply tuning the mixing ratio of discrete oligomers,the photoluminescence (PL) in a wide range of color emissions extending to near-white can be facilely modulated,illustrating the potential of these monodisperse conjugated oligomers for light emission application.The atom-,step-and pot-economic synthetic strategy here developed will open the door toward efficient and controllable synthesis of π-conjugated oligomers for accurate structure-property relationship study and optic & electronic device applications.