Synthesis and Electronic Properties of D–A–D Triads Based on 3-Alkoxy-4-cyanothiophene and Benzothienothiophene Blocks
摘要:
3-Alkoxy-4-cyanothiophene units are used as building block for the synthesis of conjugated donor acceptor donor (D-A-D) triads. The donor part consists of benzothienothiophene end groups associated with the alkoxy groups of the 3-alkoxy-4-cyanothiophene, while the central acceptor part is formed by combining the electron-withdrawing cyano group with thiophene or benzothiadiazole units.
3-Alkoxy-4-cyanothiophenes are efficiently synthesized in two steps from the readily available 4-cyano-3-oxotetrahydrothiophene. Regioisomers of bithiophene derivatives are easily synthesized by playing on the strong electronic dissymmetry of the thiophene ring induced by the alkoxy and cyano groups.
[EN] A WEAK ELECTRON-DONATING BUILDING BLOCK, COPOLYMERS THEREOF AND THEIR PREPARATION METHODS AS WELL AS THEIR APPLICATIONS<br/>[FR] ÉLÉMENT STRUCTURAL FAIBLE DONNEUR D'ÉLECTRONS, COPOLYMÈRES DE CEUX-CI ET LEURS PROCÉDÉS DE PRÉPARATION ET APPLICATIONS
申请人:UNIV SOUTH SCIENCE & TECHNOLOGY CHINA
公开号:WO2018076247A1
公开(公告)日:2018-05-03
A weak electron-donating building block, copolymers thereof and their preparation methods as well as their applications. The weak electron-donating building block provided by the present invention is of Formula I. In the present invention, incorporating strong electron-withdrawing substituents into the electron-rich 3, 3' -dialkyoxy-2, 2' -bithiophene leads to new monomers with weaker electron donating abilities and hence lower-lying HOMOs.
WO2023/101392
申请人:——
公开号:——
公开(公告)日:——
Synthesis and Electronic Properties of D–A–D Triads Based on 3-Alkoxy-4-cyanothiophene and Benzothienothiophene Blocks
3-Alkoxy-4-cyanothiophene units are used as building block for the synthesis of conjugated donor acceptor donor (D-A-D) triads. The donor part consists of benzothienothiophene end groups associated with the alkoxy groups of the 3-alkoxy-4-cyanothiophene, while the central acceptor part is formed by combining the electron-withdrawing cyano group with thiophene or benzothiadiazole units.
Effect of Cyano Substitution on Non‐Fullerene Acceptor for Near‐Infrared Organic Photodetectors above 1000 nm
作者:Jong‐Woon Ha、Hyeong Ju Eun、Byoungwook Park、Hyungju Ahn、Dong Ryeol Hwang、Yeong Seok Shim、Junseok Heo、Changjin Lee、Sung Cheol Yoon、Jong H. Kim、Seo‐Jin Ko
DOI:10.1002/adfm.202211486
日期:2023.2
correlation between darkcurrentdensity and charge injection barrier is investigated. Compared with their motivated NFA (COTH), the novel CN-substituted NFAs, COTCN and COTCN2, exhibited deeper-lying highest occupied molecular orbital energy levels and narrower optical bandgap (<1.10 eV), owing to the strong inductive and resonance effect of CN. The darkcurrent and total noise currents are minimized as