Influence of Heteroatoms on Circularly Polarized Luminescence Performance of [7]Helicene Derivatives: Aromatic vs. Non-aromatic Five-membered Rings

[7]Helicene derivatives with non-aromatic five-membered rings and heavy heteroatoms (Si and Ge) can effectively improve both Φ F and g lum , providing a strategy for the design of new CPL materials.