Unsymmetric Dithienosilole Insertion into Helicene Enhances Circularly Polarized Luminescence
Abstract
Three S,Si-heterohelicenes, STB[6]H, STB[7]H, and DSTB[7]H, with unsymmetric dithienosilole ( DTS ) were synthesized via a three-step strategy featuring Wittig and McMurry reactions, followed by photocyclization of diarylethene precursors. Their helically molecular structures were confirmed by X-ray crystal analysis. Their fluorescence quantum yields (Φ FL ) were enhanced with the increase of the benzene unit or DTS moiety in the helicene skeletons. The enantiomers of DSTB[7]H containing two DTS moieties exhibit better performance of circularly polarized luminescence (CPL) than that of STB[7]H, with both luminescence dissymmetry factors (| g lum |) reaching magnitudes on the order of 10 –3 .
Fields of Study & Subjects
Synthesis and Properties of Aromatic Compounds
Fullerene Chemistry and Applications
Synthesis and characterization of novel inorganic/organometallic compounds
Publication details
- Journal / source
- Organic Letters
- Publisher
- American Chemical Society (ACS)
- Volume
- 28
- Issue
- 4
- Pages
- 1170–1174
- Publication date
- 17 January 2026
- Language
- EN