Planarized Star-Shaped Oligothiophenes with Enhanced π-Electron Delocalization
摘要:
[GRAPHICS]Planarized star-shaped oligothiophenes 1 have been synthesized by connecting short-chain oligothiophenes on a benzo[1,2-b:3,4-b':5,6-b"]-trithiophene central core. Their electrochemical and optical properties have been characterized by cyclic voltammetry and UV-visible spectroscopy, respectively. These results associated with theoretical calculations show the advantage of benzotrithiophene as a central core in terms of pi-electron delocalization.
Isomers of organic semiconductors based on dithienothiophenes: the effect of sulphur atoms positions on the intermolecular interactions and field-effect performances
作者:Wenjing Yi、Shuai Zhao、Huiliang Sun、Yuhe Kan、Jianwu Shi、Shisheng Wan、Chunli Li、Hua Wang
DOI:10.1039/c5tc02287h
日期:——
The sulfur atoms positions in three isomers play an important role in the intermolecular interactions and OFET performances.
三种同分异构体中硫原子的位置在分子间相互作用和有机场效应晶体管性能中起着重要作用。
Synthesis of Novel Triphenylene-Type Cations Containing Both Thiophene Rings and a Tropylium Ion Ring. Cyclohepta[e]thieno[2,3-g]benzodithiophenylium Ion and Cyclohepta[e]thieno[3,2-g]benzodithiophenylium Ion
An isomeric pair of cyclohepta[e]thieno[g]benzodithiophenylium ions has been synthesized by an intramolecular Friedel-Crafts type reaction of 2(3)-thienyl-3(2)-cycloheptatrienylthiophenes in a one-pot reaction. These are the isoelectronic cations of triphenylene having both electron-rich and electron-deficient aromatic rings, thiophene and tropylium ion, respectively, in place of phenyl rings.
Synthesis and Structure of Bull’s Horn-Shaped Oligothienoacene with Seven Fused Thiophene Rings
作者:Huiliang Sun、Jianwu Shi、Zilong Zhang、Sheng Zhang、Zhaoli Liang、Shisheng Wan、Yanxiang Cheng、Hua Wang
DOI:10.1021/jo4002036
日期:2013.6.21
oligothienoacene with seven fused thiophene rings (1) based on dithieno[2,3-b:2′,3′-d]thiophene (2) was efficiently synthesized. X-ray diffraction data indicate that 1 possesses an extraordinary compressed sandwich-herringbone arrangement and shows strong intermolecular S···C and S···S interactions. In addition, the UV/vis properties, theoretical calculations, and cyclic voltammetry behaviors of 1 are also
有效地合成了基于二噻吩并[2,3- b:2',3'- d ]噻吩(2)的带有七个稠合噻吩环(1)的新型牛角形寡烯新并苯。X射线衍射数据表明1具有非同寻常的压缩三明治-人字形排列,并显示出强烈的分子间S··C和S···S相互作用。此外,还描述了1的UV / vis特性,理论计算和循环伏安行为。
Herbicidal thiophenesulfonamides and pyridinesulfonamides
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0165753A2
公开(公告)日:1985-12-27
Sulfonylurea derivatives of formula
wherein
B is a substituted thienyl or pyridyl group;
W is O or S;
R is H or CH3; and
A is a mono- or bicyclic heterocyclic group, e.g. pyrimidinyl or triazinyl;
and their agriculturally suitable salts, exhibit potent herbicidal activity. Some also show a plant growth regulant effect.
The novel compounds may be formulated into compositions for agricultural use in conventional manner. They may be made by a variety of synthetic routes, e.g. by reacting an appropriate sulfonyl isocyanate or isothiocyanate of formula BNCW with an appropriate heterocyclic amine HNR.A.
式中 B 是取代的噻吩基或吡啶基;W 是 O 或 S;R 是 H 或 CH3;A 是单环或双环杂环基团,如嘧啶基或三嗪基;以及它们的农用适 宜盐的磺酰脲衍生物具有强效除草活性,有些还显示出植物生长调节剂的作用。 这些新型化合物可按常规方法配制成农用组合物。 它们可通过多种合成路线制得,如将式 BNCW 的适当磺酰基异氰酸酯或异硫氰酸酯与适当的杂环胺 HNR.A 反应。