Synthesis of Well-Defined Head-to-Tail-Type Oligothiophenes by Regioselective Deprotonation of 3-Substituted Thiophenes and Nickel-Catalyzed Cross-Coupling Reaction
作者:Shota Tanaka、Shunsuke Tamba、Daiki Tanaka、Atsushi Sugie、Atsunori Mori
DOI:10.1021/ja205953g
日期:2011.10.26
realized by regioselective metalation of 3-substituted thiophenes with the Knochel-Hauser base (TMPMgCl·LiCl) and coupling with bromothiophene using a nickel catalyst. Treatment of 3-hexylthiophene with TMPMgCl·LiCl induces metalation at the 5-position selectively. Subsequent addition of 2-bromo-3-hexylthiophene and a nickel catalyst leads to the corresponding bithiophene. The obtained bithiophene is
TETRAZINE MONOMERS AND COPOLYMERS FOR USE IN ORGANIC ELECTRONIC DEVICES
申请人:DING Jianfu
公开号:US20120007026A1
公开(公告)日:2012-01-12
Copolymers of formula (I):
where each A is S, Se or C═C; each x is an integer from 1 to 4; each R1 is independently H, F, CN or a C
1
-C
20
linear or branched aliphatic group; Ar is one or more substituted or unsubstituted aromatic units; and, n is an integer 5 or greater, can be formed into films or membranes that are useful as active layers in organic electronic device, such as PV solar cells, providing high power conversion efficiencies and good thermal stability. Such copolymers may be synthesized from monomers of formula (II):
by Stille or Suzuki coupling reactions. Such monomers may be synthesized by a variation of the Pinner synthesis.
A library of symmetrical linear oligothiophene was prepared employing decarboxylative cross-coupling reaction as the key transformation. Thiophene potassium carboxylate salts were used as cross-coupling partners without the need of co-catalyst, base, or additives. This method demonstrates complete chemoselectivity and is a comprehensive greener approach compared to the existing methods. The modularity
dithieno[3,2-b:2′,3′-d]pyrrole (DTP) containing A–D–A oligomers for use in solution-processed bulk heterojunction solar cells is presented. This series allows investigation of the effect of alkyl chains attached to the thiophene moieties or the nitrogen of the DTP unit on the thermal and physical properties of the oligomers. The photoactivelayers were probed using absorption spectroscopy, grazing incident
提出了一系列用于溶液处理的本体异质结太阳能电池的含有A–D–A低聚物的二噻吩并[3,2- b:2',3'- d ]吡咯(DTP)的合成。该系列可以研究连接到噻吩部分或DTP单元氮上的烷基链对低聚物的热和物理性质的影响。使用吸收光谱,掠入射X射线衍射和原子力显微镜对光敏层进行探测。从这些实验中发现,连接至噻吩单元的己基链有助于在太阳能电池装置中获得良好的堆积和高填充因子。对于太阳能电池的制造,PEDOT:PSS和V 2 O 5都可以将其作为空穴传输层进行研究,并使用PDMS作为溶剂添加剂。获得了高达1.1 V的高开路电压,适度的短路电流密度和高达0.63的高填充因子,从而产生了高达5.3%的功率转换效率。