The preparation of 7-substituted norbornadiene-2,3-dicarboxylic anhydrides and an experimental and theoretical study of their reactivity
摘要:
Four new substituted methano-bridged or heteroatom-bridged norbornadienomaleic anhydrides have been prepared and converted to sesquinorbornadiene anhydrides by reaction with cyclic 1,3-dienes. The versatility of parity reversal, in conjunction with N-substituent steric effects, has been used to produce all three possible stereoisomers of the NO-sesquinorbomadiene anhydrides in separate, stereoselective cycloadditions. The anhydrides have been synthesized by cyclization of their diacids (in situ production) or by flash vacuum pyrolysis of their furan adducts (yielding crystalline products); further fragmentation occurs at these or higher temperatures to produce five-membered carbocyclic or heterocyclic anhydrides. Activation energies have been evaluated for the fragmentation and cycloaddition processes using DFT calculations (B3LYP/6-31G*) and these calculations correctly predict, which reaction can be intercepted at the norbornadienomaleic anhydride stage and preferred stereochemistry of cycloadducts. (C) 2007 Elsevier Ltd. All rights reserved.
Fluorination in thieno[3,4-c]pyrrole-4,6-dione copolymers leading to electron transport, high crystallinity and end-on alignment
作者:T. Weller、M. Breunig、C. J. Mueller、E. Gann、C. R. McNeill、M. Thelakkat
DOI:10.1039/c7tc01999h
日期:——
difluorinated polymers show ambipolar charge transport in OFETs. In contrast, tetrafluorination results in exclusively n-type behaviour with an electron mobility of 3.7 × 10−4 cm2 V−1 s−1. GIWAXS measurements of as-cast and annealed films reveal a very interesting structural alignment in thin films. All polymers show the rarely observed “end-on” orientation, where the polymer chains stand on the substrate
通过Stille缩聚反应,合成了一系列基于噻吩并[3,4- c ]吡咯-4,6-二酮和噻吩-苯基-噻吩的共聚物,在苯基单元上具有不同的氟化度。系统地研究了氟化程度对这些聚合物的光学,热和电化学性质的影响。此外,还研究了有机场效应晶体管(OFET)中的电荷传输以及薄膜取向。在热退火之后,非氟化的以及二氟化的聚合物在OFET中显示出双极性电荷传输。相反,四氟化作用仅导致电子迁移率为3.7×10 -4 cm 2 V -1 s -1的n型行为。。铸态和退火薄膜的GIWAXS测量显示出薄膜中非常有趣的结构排列。所有聚合物均表现出很少观察到的“端对端”取向,其中聚合物链位于基材上。这可以通过这些聚合物相对于膜厚度的低分子量来解释。氟化不影响微观结构性质,仅增加结晶倾向。
DIOXYPYRROLO-HETEROAROMATIC COMPOUNDS AND ORGANIC ELECTRONIC DEVICES USING THE SAME
申请人:Moon Jae-Min
公开号:US20100099840A1
公开(公告)日:2010-04-22
The present invention relates to dioxypyrrolo-heterocyclic compounds and an organic electronic device using the same. The compound of the present invention satisfies the requirements for use in an organic electronic device such as an organic light emitting device, an organic thin film transistor, and an organic solar cell, for example, suitable energy levels, and the electrochemical and thermal stability, by introducing various substituents to the core structure, and also have amorphous or crystalline property depending on the Mnd of the substituents, to satisfy the characteristics individually required for each of the devices. Further, an organic semi-conductor of p-type or n-type can be fabricated by introducing various substituents to the core structure having a property of n-type, thereby providing stability for the device.
Thermolysis of thiophenedicarboxylic acid anhydrides as a route to five-membered hetarynes
作者:Manfred G. Reinecke、James G. Newsom、Lao-Jer Chen
DOI:10.1021/ja00400a046
日期:1981.5
Diels-Alder adduct of the diene traps and the aryne 2,3-didehydrothiophene (8). A similar rationale explains the formation of dibenzothiophene from 7 and thiophene, the four monomethylthianaphthenes 22-25 from 5 and cyclopentadiene, 5,6-dimethylthianaphthene (150 from 5 and 2,3-dimethylbutadiene, and a mixture of hydroxythianaphthenes ( 1 9 ) from 5 and furan. The latter reaction also produces a mixture
conjugated polymers have been investigated for application in organic photovoltaic cells (OPVs) to achieve efficientconversion of the wide spectrum of sunlight into electricity. A remarkable improvement in power conversion efficiency (PCE) has been achieved through the use of innovative materials and device structures. However, a reliable technique for the rapid screening of the materials and processes
From-Core and From-End Direct CH Arylations: A Step-Saving New Synthetic Route to Thieno[3,4-<i>c</i>]pyrrole-4,6-dione (TPD)-Incorporated D--π-A-π-D Functional Oligoaryls
作者:Po-Han Lin、Kuan-Ting Liu、Ching-Yuan Liu
DOI:10.1002/chem.201501015
日期:2015.6.8
contrast to the traditional multistep synthesis, herein an efficient and fewer‐steps new synthetic strategy is demonstrated for the facile preparation of organic‐electronically important D–π–A–π–D‐type oligoaryls through sequential direct CH arylations. This methodology has shown that the synthesis of thieno[3,4‐c]pyrrole‐4,6‐dione (TPD)‐ or furano[3,4‐c]pyrrole‐4,6‐dione (FPD)‐centred target molecules
与此相反的传统多步合成,本文中的高效和少数步骤新的合成策略是证明了通过顺序直接C中容易制备的有机电子重要d-π-A-π-d型oligoaryls ħ芳基化。该方法学表明,以噻吩并[3,4- c ]吡咯-4,6-二酮(TPD)或呋喃并[3,4- c ]吡咯-4,6-二酮(FPD)为中心的目标分子的合成可以从核心结构(受体)或末端结构(供体)经济地步入,这为π功能小分子半导体材料的制备提供了更灵活,更简洁的新合成替代品。另外,检查了合成的低聚芳基的光学和电化学性质。