Planar β-Linked Oligothiophenes Based on Thieno[3,2-<i>b</i>]thiophene and Dithieno[3,2-<i>b</i>:2‘,3‘-<i>d</i>]thiophene Fused Units
作者:Lidaris San Miguel、William W. Porter、Adam J. Matzger
DOI:10.1021/ol0630393
日期:2007.3.1
oligothiophenes based on thieno[3,2-b]thiophene and dithieno[3,2-b:2',3'-d]thiophene fused units were synthesized. The optical data indicate a blue shift of the absorption maximum in comparison to the alpha-linked analogues due to cross-conjugation between fused rings. The crystal structures of 3,3'-bi(thieno[3,2-b]thiophene) and 3,3';6',3"-ter(thieno-[3,2-b]thiophene) reveal edge-to-face pi-stacked dimer
Selenophene-Based Heteroacenes: Synthesis, Structures, and Physicochemical Behaviors
作者:Wan Xu、Mengjie Wang、Zhiying Ma、Zhen Shan、Chunli Li、Hua Wang
DOI:10.1021/acs.joc.8b02107
日期:2018.10.5
On the basis of three new building blocks, dithieno[3,2-b:2',3'-d]selenophene (tt-DTS), diseleno[3,2-b:2',3'd]thiophene (tt-DST), and diseleno[3,2-b:2',3'-d]selenophene (tt-DSS), four thiophene-and selenophene-based heteroacenes (3a-d) with up to seven fused rings were designed and synthesized. Another two selenophene-based heteroacenes (1 and 2) with three and five fused rings were prepared. The molecular structures of 1, 2, 3a, and 3c were confirmed by single-crystal analysis. The results showed that molecular structures, spectroscopy features, and cyclic voltammetry behaviors could be modulated by changing the heteroatoms from sulfur to selenium for 3a-d or changing the numbers of selenophene rings for 1, 2, and 3d.
Selenophene-containing heterotriacenes by a C–Se coupling/cyclization reaction
A new novel family of tricyclic sulfur and/or selenium-containing heterotriacenes 2–4 with an increasing number of selenium (Se) atoms is presented. The heterotriacene derivatives were synthesized in multistep synthetic routes and the crucial cyclization steps to the stable and soluble fused systems were achieved by copper-catalyzed C–S and C–Se coupling/cyclization reactions. Structures and packing