Year: 2026
Type: preprint
Abstract: Here, we report the synthesis and photoreactivity of a phenothiazine fused [4]helicene, namely 3,13dimethoxybenzo[4,5]quinolino[3,2,1-kl]phenothiazine (MBQP). Comprehensive photophysical studies reveal that MBQP exhibits a high photoluminescence quantum yield of 60.3% and strong circularly-polarized luminescence, with high glum of 2.0 × 10-3 in DMSO. Besides its excellent chiroptical properties, MBQP can undergo a photoinduced chloroformylation reaction upon 365 nm irradiation in chloroform, enabling direct functionalization of the helicene framework. Notably, the emission of resulting photoproducts redshift to ~500, 550, and 660 nm, together with quantum yields up to 77.2%, demonstrating that the photochemical transformation can simultaneously functionalize the helicene framework and improve its luminescence performance. This work provides a straightforward example for the facile synthesis and post-functionalization of color-tunable chiral materials.
Source: ChemRxiv
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7213471062