Palladium-catalyzed coupling reactions towards the synthesis of well-defined thiophene-oligomers
摘要:
Heck- and Ullmann-type palladium-catalyzed reactions were used in order to perform the synthesis of 3',4"-dioctyl-2,2',5'2",5",2"'-tetrathienyl. The desired oligothiophene was synthesized in five steps with a total yield of 38% by a Heck-type reaction of bromo-derivatives and a yield of 45% by an Ullmann-type reaction of iodo-precursors. (C) 2003 Elsevier B.V. All rights reserved.
以熊田和Sonogashira偶联反应为关键步骤,合成了一系列带有两个X型5,5'-双(苯基乙炔基)-2,2'-联噻吩基的带有两个长侧链烷基和两个末端甘油基的Balaamphiphils。通过POM,DSC和X射线散射研究了这些化合物的热致液晶行为。与侧向烷基链两种不同液晶相的具有蜂窝结构,柱的伸长六角Δ/ p 6毫米,由(有缺陷的)形成三角形的蜂窝单元,和Col SQU / p 4毫米对于这些化合物,观察到带有方格的样品。UV和PL测量表明荧光特性使其成为潜在的候选荧光传感器设备。
Convenient synthesis of organic-electronics-oriented building blocks via on-water and under-air homocoupling of (hetero)aryl iodides
作者:Yi-An Chen、Ching-Yuan Liu
DOI:10.1039/c5ra13517f
日期:——
operationally simple homocoupling reaction that targets the convenient synthesis of organic-electronically important building blocks. A variety of synthetically useful bithiophene derivatives and functionalized biphenyls are efficiently prepared by an on-water and under-air protocol using Pd/C as catalyst. We find that Pd/C gives generally higher and cleaner homocoupling conversions than using Pd(OAc)2 in the
The polymerization of 2-iodo-3-alkylthiophenes using a Heck-type reaction with Pd(OAc)(2) / NBu4Br as catalytic system is reported leading to expected functionalized oligomers with good yields. (C) 1999 Elsevier Science Ltd. All rights reserved.
MULTI-BLOC COPOLYMER BASED TUNABLE LIGHT EMITTING DIODE, POLYMERS SUITABLE THEREFOR AND OLIGOMERS
申请人:Rijksuniversiteit te Groningen
公开号:EP0677208A1
公开(公告)日:1995-10-18
US8957181B2
申请人:——
公开号:US8957181B2
公开(公告)日:2015-02-17
[EN] MULTI-BLOC COPOLYMER BASED TUNABLE LIGHT EMITTING DIODE, POLYMERS SUITABLE THEREFOR AND OLIGOMERS<br/>[FR] DIODE ELECTROLUMINESCENTE ACCORDABLE A BASE DE COPOLYMERES EN BLOCS MULTIPLES, POLYMERES ASSOCIES ET OLIGOMERES
申请人:RIJKSUNIVERSITEIT TE GRONINGEN
公开号:WO1994015368A1
公开(公告)日:1994-07-07
(EN) The invention is directed to a light emitting diode (LED) emitting light having a wavelength from 400 to 850 comprising an electroluminescing material, electrodes and optionally carrier material and/or reflecting material, said electroluminescing material comprising at least one block copolymer consisting of at least two types of blocks, active blocks sandwiched between non-active blocks, said active blocks being a $g(p)-conjugated block of at least 2 and at most 16 monomeric units, said $g(p)-conjugated block having a substantially uniform block length throughout the copolymer, and said non-active block having no $g(p)-conjugation, optionally with additional electron and/or hole transport properties, to polymers suitable for preparing such LED, to oligomers for preparing said multiblock copolymers and to various processes.(FR) Diode électroluminescente (DEL) émettant une lumière dont la longueur d'onde est comprise entre 400 et 850, comportant une matière électroluminescente, des électrodes et éventuellement une matière porteuse et/ou une matière réfléchissante. Ladite matière électroluminescente comporte au moins un copolymère en blocs constitué d'au moins deux type de blocs, à savoir des blocs actifs intercalés entre des blocs non actifs, lesdits blocs actifs étant un bloc $g(p)-conjugué possédant de 2 à 16 motifs monomères et présentant une longueur sensiblement homogène dans l'ensemble du copolymère, et ledit bloc non actif ne présentant aucune conjugaison $g(p), et éventuellement doté de propriétés supplémentaires de transport d'électrons et/ou de trous. On a également prévu des polymères utilisables dans la préparation d'une telle diode électroluminescente des oligomères pour la préparation desdits copolymères en blocs multiples, et divers procédés.