当前位置: X-MOL 学术J. Heterocycl. Chem. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Design and Synthesis of Novel Organic Luminescent Materials Based on Pyrazole Derivative
Journal of Heterocyclic Chemistry ( IF 2.0 ) Pub Date : 2019-03-19 , DOI: 10.1002/jhet.3343
Yingxiang Duan 1 , Qian Zhao 1 , Yanhua Yang 1 , Jinyang Zhang 1 , Xuan Tao 2 , Yingzhong Shen 1
Affiliation  

Five new materials based on pyrazole derivatives have been synthesized and characterized as organic light‐emitting devices. This report presents a novel approach to combine pyrazole with aromatic hydrocarbons via methylene. The formed molecules exhibited twisted structures, which resulted in high glass transition temperatures (Tg), which ranged from 83.0 to 101.1°C. They also had high optical band gaps (Eg); most of their optical band gaps are determined by the absorption edge technique as 3.43 to 3.66 eV, evaluated photophysical properties of these synthesized novel chromophores, the optical properties such as maximum absorption and emission wavelengths (λ; nm), molar extinction coefficients (ε; cm−1·M−1), Stokes' shifts (ΔλST; nm), and quantum yields (φF). These compounds exhibited intense absorption bonds between 230 and 350 nm, and the effect of solvent polarity on emission of these pyrazole derivatives was also studied. In addition, they showed blue fluorescence in different solvents and bathochromic shift with the increase in the solvent polarity.

中文翻译:

基于吡唑衍生物的新型有机发光材料的设计与合成

已经合成了五种基于吡唑衍生物的新材料,并将其表征为有机发光器件。该报告提出了一种新颖的方法,可通过亚甲基将吡唑与芳烃结合。形成的分子表现出扭曲的结构,从而导致较高的玻璃化转变温度(T g),其范围为83.0至101.1°C。它们还具有高的光学带隙(E g);它们的大多数光学带隙是通过吸收边缘技术确定的,为3.43至3.66 eV,评估了这些合成的新型生色团的光物理性质,光学性质,例如最大吸收和发射波长(λ; nm),摩尔消光系数(ε;厘米-1 ·M -1),斯托克斯位移(Δλ ST ;纳米),和量子产率(φ ˚F)。这些化合物在230至350 nm之间表现出强烈的吸收键,并且还研究了溶剂极性对这些吡唑衍生物发射的影响。此外,它们在不同的溶剂中显示出蓝色荧光,并且随着溶剂极性的增加而出现红移。
更新日期:2019-03-19
down
wechat
bug