The synthesis of new functionalized 1,2-bis(benzodithienyl)ethenes as well as the preparation of the new tetrathia[7]helicenes are described. The helicenes reported are new chiral push-pull molecules, with potential application in optoelectronics.
Sparkling Organic Phosphorescence from Fluorinated Tetrathia[7]helicenes: Synthesis and Photophysical, Electrochemical and Computational Studies
作者:Alberto Bossi、Patrizia R. Mussini、Gianluca Farinola、Marta Penconi、Silvia Cauteruccio、Mark E. Thompson、Emanuela Licandro
DOI:10.1002/chem.202300339
日期:——
Putting a green spin on [7]TH: Fluorination of the tetrathia[7]helicene backbone disclosed important functionalization-related structure-electronic alterations crucial in the design of novel chiral derivatives. [7]THs also show brilliant green phosphorescence resulting from enhanced spin-orbit coupling (SOC) due to an S-atom effect and distortion annulation.
在 [7]TH 上进行绿色旋转:四硫[7]螺旋烯主链的氟化揭示了重要的功能化相关结构电子改变,这对新型手性衍生物的设计至关重要。[7]THs 还显示出明亮的绿色磷光,这是由于 S 原子效应和畸变环化而增强的自旋轨道耦合 (SOC)。
Tunable blue-emitting fluorophores—benzo[1,2-b:4,3-b′]dithiophene and trithia[5]helicene end-capped with electron-rich or electron-deficient aryl substituents
作者:Ying Hu、Brigitte Wex、Marc W. Perkovic、Douglas C. Neckers
DOI:10.1016/j.tet.2007.12.029
日期:2008.2
Light-emitting fluorophores 1-10b based on aryl substituted benzo[1,2-b:4,3-b']dithiophenes (BDT) and trithia[5]helicenes (T5H) have been synthesized using various combinations of Suzuki coupling, the Wittig, or McMurry reaction, and subsequent photocyclization of the dithienylethenes thus obtained. Photophysical properties of the helical compounds end-capped with different electron-rich and electron-deficient aryl moieties thus resulting were evaluated. Photocyclization of a dithienylethene derivative 10a was investigated, and the X-ray crystal structure of dinaphthyl-substituted BDT (4) was obtained. With this series of compounds 1-10b, we demonstrate that the optical properties of all of the new compounds, and by extension many conjugated materials, can be tuned over the entire blue range (400-480 nm). (C) 2007 Elsevier Ltd. All rights reserved.