Silver-Mediated C<sub>α</sub>(sp<sup>3</sup>)-H Functionalization of Primary Amines: An Oxidative C-N Coupling Strategy for the Synthesis of Two Different Types of 1,2,4,5-Tetrasubstituted Imidazoles
作者:Rajib Sarkar、Chhanda Mukhopadhyay
DOI:10.1002/ejoc.201403465
日期:2015.2
A new silver(I)-mediated Cα(sp3)–H bond functionalization of primaryamines and subsequent oxidativeC–N cross-coupling reaction has been demonstrated. This protocol provides a simple, highly efficient, and straightforward approach to form significantly diverse 1,2,4,5-tetrasubstitutedimidazoles. In this course of the reaction, a stoichiometric amount of Ag2CO3 was employed. Upon completion of reaction
Highly efficient deep-blue fluorescence OLEDs with excellent charge balance based on phenanthro[9,10-<i>d</i>]oxazole-anthracene derivatives
作者:Seokwoo Kang、Jin-Suk Huh、Jang-Joo Kim、Jongwook Park
DOI:10.1039/d0tc01811b
日期:——
Two blue fluorescent materials, m-PO-ABN and p-PO-ABN, are newly synthesized by controlling the conjugation length based on different linkages of the meta or para position between the phenanthro[9,10-d]oxazole (PO) moiety and anthracene substituted with a cyano group. The two materials emit deep-blue light with a high photoluminescence quantum yield (PLQY) in solution state. Non-doped devices fabricated
通过基于菲咯[9,10- d ]恶唑(PO)部分之间的间位或对位的不同键控控制共轭长度,新合成了两种蓝色荧光材料,m -PO-ABN和p -PO-ABN蒽被氰基取代。两种材料在溶液状态下发出深蓝色光,并具有高的光致发光量子产率(PLQY)。使用m -PO-ABN和p -PO-ABN制造的非掺杂器件显示在448和460 nm处的EL峰分别对应于国际照明委员会(CIE)坐标(0.148,0.099)和(0.150,0.164)。对于m -PO-ABN和p -PO-ABN而言,器件的外部量子效率(EQE)值分别为5.9%和5.3%。瞬态EL测量和光学计算结果表明,两种材料在器件中均显示出良好的电荷平衡和三重态-三重态an灭,这可能是由于PO和氰基部分的插入而增强了双极特性。
A convenient strategy to 2,4,5-triaryl and 2-alkyl-4,5-diaryl oxazole derivatives through silver-mediated oxidative C O cross coupling/cyclization
作者:Rajib Sarkar、Chhanda Mukhopadhyay
DOI:10.1016/j.tetlet.2015.04.103
日期:2015.6
This is a silver(I) mediated C-alpha(sp(3))-H activation of primary amines followed by oxidative C-O cross coupling/cyclization for the construction of 2,4,5-triaryl and 2-alkyl-4,5-diaryl oxazole derivatives. The protocol has been successfully utilized to synthesize the oxazole derivatives in good to excellent yields. In this oxidative coupling, the silver species after the reaction was successfully re-synthesized and reused with almost a similar activity. (C) 2015 Elsevier Ltd. All rights reserved.
Novel Polymers
申请人:Chebotareva Natalia
公开号:US20100249349A1
公开(公告)日:2010-09-30
The present invention relates to novel polymers comprising a repeating unit of the formula (I) and their use in electronic devices. The polymers according to the invention have excellent solubility in organic solvents and excellent film-forming properties. In addition, high charge carrier mobilities and high stability of the emission color can be observed, if the polymers according to the invention are used in organic light emitting diodes (OLEDs).