在此,我们合成了基于4,5-二苯基-1H-咪唑和2-( 1H-吲哚-3-基)乙腈的供体-π-受体荧光团,并研究了它们的光学、热学、电致发光性质。这两种荧光团均表现出高荧光量子产率 ( Φ f = <0.6) 和良好的热稳定性 ( T d10 = <300 °C),并且可能是 OLED 应用的绝佳候选者。此外,还分析了化合物在不同极性的各种溶剂中的基态和激发态性质。使用密度泛函理论(DFT)和时间相关密度泛函理论(TDDFT)方法研究了基态和激发态荧光团的几何和电子结构。 BIPIAN 和 BITIAN 在各种溶剂中的吸收对应于 S 0 → S 1跃迁,并且相对于较高振荡器强度的最强谱带主要由 HOMO → LUMO 跃迁贡献。值得注意的是,采用BITIAN作为发射极制备了真空沉积非掺杂OLED器件,该器件在564 nm处显示出电致发光(EL)、最大电流效率(CE)0.687 cd A -1和最大外量子效率(EQE)
在此,我们合成了基于4,5-二苯基-1H-咪唑和2-( 1H-吲哚-3-基)乙腈的供体-π-受体荧光团,并研究了它们的光学、热学、电致发光性质。这两种荧光团均表现出高荧光量子产率 ( Φ f = <0.6) 和良好的热稳定性 ( T d10 = <300 °C),并且可能是 OLED 应用的绝佳候选者。此外,还分析了化合物在不同极性的各种溶剂中的基态和激发态性质。使用密度泛函理论(DFT)和时间相关密度泛函理论(TDDFT)方法研究了基态和激发态荧光团的几何和电子结构。 BIPIAN 和 BITIAN 在各种溶剂中的吸收对应于 S 0 → S 1跃迁,并且相对于较高振荡器强度的最强谱带主要由 HOMO → LUMO 跃迁贡献。值得注意的是,采用BITIAN作为发射极制备了真空沉积非掺杂OLED器件,该器件在564 nm处显示出电致发光(EL)、最大电流效率(CE)0.687 cd A -1和最大外量子效率(EQE)
申请人:Korea University Research and Business Foundation, Sejong Campus 고려대학교 세종산학협력단(120160588723) Corp. No ▼ 164771-0006826BRN ▼630-82-00092
公开号:KR20210091448A
公开(公告)日:2021-07-22
광전소자용 화합물이 제공된다. 광전소자용 화합물은, 도너인 이미다졸 코어 및 억셉터인 인돌 아세토니트릴 코어를 가지며, 상기 도너와 억셉터가 π 스페이서로 연결되어 BITIAN으로 명명되는 하기 화학식 1 또는 BIPIAN으로 명명되는 하기 화학식 2로 표시될 수 있다. [화학식 1] [화학식 2]
Covalently anchored organic carboxylic acid on porous silica nano particle: A novel organometallic catalyst (PSNP-CA) for the chromatography-free highly product selective synthesis of tetrasubstituted imidazoles
A novel organometallic catalyst (PSNP-CA) has been prepared by post synthesis grafting of -COOH functionalized organosilane on porous silica nano particle by using surface hydroxyl groups as anchor point. It was characterized by using an array of sophisticated analytical techniques like 13C CP MAS NMR, 29Si MAS NMR, CHN analysis, BET, HR TEM, XRD, TGA, FTIR and pH measurement. The leaching of the active site is greatly avoided as the organic moieties are covalently attached to the inorganic support. This is the first example of organocatalysis promoted by a -COOH functionalized porous silica nano particle for the chemoselective synthesis of densely substituted imidazoles. The molecular scaffolds which assimilate bio-active imidazole moiety may be worthwhile molecule from the biological point of view. All the other reported procedures led to the mixture of tri and tetra substituted imidazoles and their proportions were successfully evaluated from crude H-1 NMR spectra. Greenness of the process was well instituted as water was exploited as reaction medium. This catalyst retained its activity after having it exposed to ambient atmosphere for 10 days. There was no deteriorating effect of aerial oxygen or moisture towards the activity of the catalyst. (C) 2013 Elsevier B.V. All rights reserved.