Regioselectivity in the Scholl Reaction: Mono and Double [7]Helicenes
作者:Mohammad Mosharraf Hossain、Khushabu Thakur、Marat R. Talipov、Sergey V. Lindeman、Saber Mirzaei、Rajendra Rathore
DOI:10.1021/acs.orglett.1c01706
日期:2021.7.2
We employed the density functionaly theory (DFT)-predicted regioselectivity of the intramolecular Scholl reaction in phenanthrene and dibenzo[g,p]chrysene frameworks to obtain π-extended mono and double [7]helicenes, respectively. The formation of these helical structures occurs despite the buildup of a large strain energy up to 30 kcal/mol compared with their most stable isomers. The twisted and strained
我们采用了密度泛函理论 (DFT) 预测的菲和二苯并 [ g , p ] 骨架中分子内 Scholl 反应的区域选择性,分别获得了 π 扩展的单和双 [7] 螺旋。尽管与其最稳定的异构体相比,积累了高达 30 kcal/mol 的大应变能,但仍会形成这些螺旋结构。通过实验(核磁共振、紫外-可见光、发射、电化学和单晶 X 射线衍射)技术对扭曲和应变结构进行了表征和分析,并得到了 DFT 计算的进一步支持。
Dibenzo[ g,p ]chrysene: A new platform for highly efficient red phosphorescent organic light-emitting diodes
compound, 3,6,11,14-tetraphenyldibenzo[g,p]chrysene (TPDBC), was designed, synthesized, and fabricated in a red phosphorescent organic light-emitting diode (PHOLED) with a maximum external quantum efficiency (EQE) of 14.4%, which represented the first report of a dibenzo[g,p]chrysene motif as the building block for host materials. It was conjectured that dibenzo[g,p]chrysene may serve as a next generation
suitable for anode buffer in electronic devices. When 4 nm MeOPhN-DBC was inserted between the active layer and MoO3 to form double interfaciallayers in the inverted polymer solar cells based on poly (3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) blended active layer, the power conversion efficiency was improved 24.7% compared to device with only MoO3 buffer (2.95% vs 3.68%)
Mechanochemistry-Directed Ligand Design: Development of a High-Performance Phosphine Ligand for Palladium-Catalyzed Mechanochemical Organoboron Cross-Coupling
作者:Tamae Seo、Koji Kubota、Hajime Ito
DOI:10.1021/jacs.2c13543
日期:2023.3.29
originally developed for use in solution, have been used directly in mechanochemical reactions without any molecular-level modifications to ensure their suitability for mechanochemistry. Alas, this has limited the development of more efficient mechanochemical cross-coupling processes. Here, we report a conceptually distinct approach, whereby a mechanochemistry-directed design is used to develop ligands for