End Group-Functionalization and Synthesis of Block-Copolythiophenes by Modified Nickel Initiators
摘要:
Polythiophenes with alcohol, tosylate, azide, ethynylene, carboxylic acid, and amine end groups were prepared by a combination of functionalized nickel initiators and postpolymerization reactions. The azide and ethynylene polymers were subsequently used in a click reaction to produce a conjugated block copolymer. Finally, a conjugated triblock-copolymer was synthesized by means of a chain growth polymerization initiated by a binuclear nickel initiator.
The transition-metal-catalyzed oxidative cross-coupling between two coupling partners with similar structure and electronic characteristics remains a challenge owing to difficulty in suppressing undesired homo-couplings. We herein report a Pd-catalyzed oxidative cross-coupling between two thiophenes under mild reaction conditions. This approach can also be extended to furans. Some notable advantages
Method for Aerobic Oxidative Coupling of Thiophenes with a Ligand-Supported Palladium Catalyst
申请人:Wisconsin Alumni Research Foundation
公开号:US20190210993A1
公开(公告)日:2019-07-11
An oxidative homocoupling method of synthesizing certain 2,2′-bithiophenes from thiophenes using oxygen as the terminal oxidant is disclosed. In non-limiting examples, the method uses oxygen along with a catalytic system that includes palladium, an assistive ligand, and a non-palladium metal additive to catalyze one of the following reactions:
Associated catalytic systems and compositions are also disclosed.
Pd-Catalyzed Aerobic Oxidative Coupling of Thiophenes: Synergistic Benefits of Phenanthroline Dione and a Cu Cocatalyst
作者:Stephen J. Tereniak、David L. Bruns、Shannon S. Stahl
DOI:10.1021/jacs.0c09962
日期:2020.12.2
they are ideally prepared via directoxidative C-H/C-H coupling. Here, we report a novel PdII catalystsystem, employing 1,10-phenanthroline-5,6-dione (phd) as the ancillary ligand, that enables aerobicoxidative homocoupling of 2-bromothiophenes and other related heterocycles. These observations represent the first use of phd to support Pd-catalyzed aerobicoxidation. The reaction also benefits from
The synthesis and characterization of two thieno(bis)imide based n-type semiconductors with electron mobilities of up to 0.3 cm(2) V(-1) s(-1) are described. The relationships between the electronic features of the pi-inner core and the functional properties of the new materials are also discussed.
Monomers, Oligomers and Polymers Comprising Thiophene and Selenophene
申请人:Heeney Martin
公开号:US20080303000A1
公开(公告)日:2008-12-11
The invention relates to novel mono-, oligo- and polymeric compounds comprising thiophene and selenophene, to their use as semiconductors or charge transport materials, in optical, electro-optical or electronic devices, and to optical, electro-optical or electronic devices comprising the novel compounds.