Small Molecule NIR‐II Dyes for Switchable Photoluminescence via Host –Guest Complexation and Supramolecular Assembly with Carbon Dots (Adv. Sci. 22/2022)

Switchable Photoluminescent Small Molecular NIR‐II Dyes In article number 2202414 by Dipanjan Pan and co‐workers, three small molecular NIR‐II dyes are synthesized that show augmentation in emission intensity (Switch‐On) when self‐assembled in presence of cucurbit[8]uril (structures shown in cover picture). The results show that further addition of carbon dots to the nanocubes leads to the quenching of fluorescence of these host‐guest complexes (Switch‐Off). The described strategy thus provides flexibility in the user‐defined tuning of photoluminescence.