Pairing multicomponent stators with aromatic rotators for new emissive molecular rotors†
We demonstrate here that the Ugi–Sonogashira protocol can be successfully used to obtain five new molecular rotors 10a–e with strong emission. They have been synthesized by combining multicomponent Ugi stators and several aromatic rotary components: phenylene, p-xylene, naphthalene and anthracene. The synthesized conjugated rotors are highly fluorescent (Φf = 0.39 to Φf = 0.10), and changes in their emission were observed upon variations of the surrounding media. Particularly, we found that they are sensitive to aggregation (THF/water) or high viscosity (methanol/glycerol) conditions. This work paves the way to develop new emissive rotors with exciting photophysical properties.
- This article is part of the themed collections: 2021 Organic & Biomolecular Chemistry HOT article collection and Synthetic methodology in OBC