Extended orthogonally fused conducting oligomers for molecular electronic devices
作者:James M. Tour、Ruilian Wu、Jeffry S. Schumm
DOI:10.1021/ja00018a069
日期:1991.8
Abstract : Described is an approach to orthogonallyfused conjugated organic compounds that may act as molecular switching devices. Four thiophene trimers are added in a single operation to spiro-fused cores to afford the target molecules. A spiro-fused thiophene-based monomer system is converted to a spiro- fused heptamer that is 25 A long. The synthesis of a mixed phenylene-thiophene system is described
摘要:描述了一种可用作分子开关器件的正交稠合共轭有机化合物的方法。在一次操作中将四个噻吩三聚体添加到螺旋融合核心以提供目标分子。一个基于螺环稠合噻吩的单体系统被转化为一个长度为 25 A 的螺环稠合七聚体。描述了混合亚苯基-噻吩系统的合成,该系统提供了 30 长的螺合八聚体。在每种情况下,噻吩上的烷基取代基都提供可溶性物质。三甲基甲硅烷基端基位于每个正交稠合系统的侧翼。有机钯和有机镍催化的过程广泛用于合成正交稠合化合物。
Silane compound for use in the synthesis of semiconducting polymers with
申请人:The University of South Carolina
公开号:US05059695A1
公开(公告)日:1991-10-22
The stereochemical structure necessary for preparation of perpendicularly arranged cores is provided by a compound of the formula ##STR1## wherein X is a reactive group through which polymeric subunits can be bonded to the compound. In particular, X is advantageously Br. This compound can be synthesized by the reaction of tetrakis(3'-trimethylsilyl-2'-propynyl)silane with zirconocene dichloride and n-butyllithium and adding sulfur monochloride to the reaction product. This produces an adduct in which X is SiMe.sub.3. This adduct may be converted to the bromo compound by reaction with bromine. The tetrakis(3'-trimethylsilyl-2-propynyl)silane may be prepared by forming a magnesium Grignard reagent from 3-bromo-1-trimethylsilylpropyne and reacting the Grignard reagent with silicon tetrachloride.
Novel bis-acenes are described whose acene subunits are held in an almost orthogonal geometry by silicon-spiro centers. The synthesis involves Diels-Alder active bis-dienes with orthogonal five-membered rings.
作者:Ruilian Wu、Jeffry S. Schumm、Darren L. Pearson、James M. Tour
DOI:10.1021/jo960897b
日期:1996.1.1
the core in a single operation, thus making the syntheses highly convergent. In the cases of the larger functionalized systems, alkyl substituents on the thiophenes afford soluble materials. In order to prepare the molecules with >50 Å lengths, an iterative divergent/convergent approach had to be utilized for the construction of oligo(thiophene-ethynylene) branching arms. Organopalladium-catalyzed procedures