The development of disilane‐bridged donor–acceptor–donor (D‐Si‐Si‐A‐Si‐Si‐D) and acceptor–donor–acceptor (A‐Si‐Si‐D‐Si‐Si‐A) compounds is described. Both types of compound showed strong emission (λem=ca. 500 and ca. 400 nm, respectively) in the solid state with high quantum yields (Φ: up to 0.85). Compound 4 exhibited aggregation‐induced emission enhancement in solution. X‐ray diffraction revealed
Thieno[3,4-<i>b</i>]pyrazines: Synthesis, Structure, and Reactivity
作者:Don D. Kenning、Kari A. Mitchell、Tessa R. Calhoun、Melanie R. Funfar、Daniel J. Sattler、Seth C. Rasmussen
DOI:10.1021/jo0262255
日期:2002.12.1
the efficient preparation of 2,3-disubstituted thieno[3,4-b]pyrazines. These methods eliminate problems in the preparation of the precursor 3,4-diaminothiophene and utilize alpha-diones prepared through the reaction of the appropriate organocuprates with oxalyl chloride. This combination allows the convenient preparation of thieno[3,4-b]pyrazine and its 2,3-disubstituted analogues (where substituent
Novel NIR‐emitting organic dyes with aggregation‐induced emission (AIE) properties are described. The thienopyrazine‐based donor‐acceptor‐donor structure allows for easy tuning of the photophysical properties. The intense light absorption ability and the emission in the red/NIR region, both in solution and in the aggregate phase, make them attractive for potential use as functional organic materials
Thieno[3,4-<i>b</i>]pyrazine-based oligothiophenes: simple models of donor–acceptor polymeric materials
作者:Li Wen、Christopher L. Heth、Seth C. Rasmussen
DOI:10.1039/c4cp00312h
日期:——
Thieno[3,4-b]pyrazine-based oligomers have been thoroughly investigated in order to correlate the effects of conjugation length and ‘donor–acceptor’ properties on the resulting optical and electronic properties.
DIRECT CH ARYLATION METHOD USING PALLADIUM-BASED CATALYST
申请人:Lee Jae-Suk
公开号:US20140142263A1
公开(公告)日:2014-05-22
Disclosed herein is a first example of effective direct position specific C—H arylation of thieno[3,4-b]pyrazine derivative and several hetero aryl bromide under the ‘Heck-type’ experiment condition using Pd(OAc)
2
/n-Bu4NBr as a catalyst system, thienopyrazine in which aryl is replaced to increase various values. The current synthesis methodology is a simpler method than a facial method and is used to prepare π-conjugated oligomer and/or polymer material based on interesting hexylthiophen and thienopyrazine portion for electronic industries which construct a new synthetic organic material using potential application programs. The arylation generates more position selectivity in a C—H bond than in a pyrazine C—H bond. The optical and electrical characteristics of the synthesis copolymer are survey.