Carbazole N-substituent effect upon DTMA: stabilizing and photochromic modulating
摘要:
Dithienylmaleimide derivatives 7-27 were synthesized by introducing N-substituted carbazole for photo-stabilizing purpose, and the structures were fully confirmed. The photochromism and photo-stability were recorded via UV-vis spectra. Only ortho compounds 8-17 with N-substituents on carbazole moiety showed escalated photochromic change, while compound 7 and the para counterparts 18-27 showed no appreciable photochromism. Additionally, compounds 8-18 exhibited good photo-stability except 17 under 254 nm irradiation. The unstability of 17 may probably due to overrunning hindrance. These photochromic patterns indicated that hindrance and electronic effect mutually paid a decisive influence on the photochromism and photo-stability, which potentially exploited a new way to construct novel photochromic materials with regulable and conceivable performance. (c) 2013 Elsevier Ltd. All rights reserved.
(metal-free) recyclable oxidants, such as DDQ or CA/H+, for accessing bicarbazole regioisomers. Differently substituted carbazoles are examined to showcase regioselective discrimination (3,3′- versus 1,3′-bicarbazoles) and preferences based on sterics and electronics in oxidative coupling. Finally, a mechanism that involves the carbazole radical cation has been traced (evidenced) and proposed on the basis of the
在存在有机(无金属)可循环使用的氧化剂(例如DDQ或CA / H +)的情况下,具有各种取代基的咔唑的氧化C-C偶联反应证明了该化合物可与联咔唑区域异构体接触。对不同取代的咔唑进行了研究,以显示区域选择性的区别(3,3'-与1,3'-联咔唑)和在氧化偶联中基于空间和电子学的偏好。最终,已经找到(证明)了涉及咔唑自由基阳离子的机理,并在紫外可见近红外吸收和EPR光谱结果的基础上提出了一种机理。这项研究强调了以有效方式对一系列联咔唑进行战略化学制备的方法。
화합물 및 이를 포함하는 유기 발광 소자
申请人:Soulbrain Co., Ltd. 솔브레인 주식회사(120200555471) Corp. No ▼ 131111-0597525BRN ▼524-86-01789
公开号:KR20190064518A
公开(公告)日:2019-06-10
본 발명은 화학식 1의 화합물 및 이를 포함하는 유기 발광 소자를 제공한다. [화학식 1]
本发明提供了化学式1的化合物和包含该化合物的有机发光器件。 [化学式1]
Diarylation of N- and O-nucleophiles through a metal-free cascade reaction
The arylation of heteroatom nucleophiles is a central strategy to reach diarylated compounds that are key building blocks in agrochemicals, materials, and pharmaceuticals. Nucleophilicaromaticsubstitution is a classical tool for such arylations, and recent developments in hypervalent iodine-mediated arylations allow a wider scope of products. Herein, we combine the benefits of these strategies to
Organic electroluminescent material, organic electroluminescent device and quantum dot electroluminescent unit
申请人:HannStar Display (Nanjing) Corporation
公开号:US10115910B2
公开(公告)日:2018-10-30
An organic electroluminescent material, an organic electroluminescent device, a quantum dot electroluminescent unit, and a quantum dot electroluminescent device are disclosed. The quantum dot electroluminescent unit includes a plurality of electro-phosphorescent quantum dots and at least an organic electroluminescent material, and the electro-phosphorescent quantum dots disperse in the organic electroluminescent material. The organic electroluminescent material has a structure of the following Formula (1),
wherein one or two of R2, R4, R6, R9, or R13 are independent triazole derivatives, and the triazole derivatives have the structure of the following Formula (2),