Selective C–C bond cleavage of cyclopentadiene rings assisted by ferric chloride to synthesize water-soluble pyrylium salts†
Abstract
A facile procedure for C–C bond cleavage of cyclopentadiene rings is reported, and a series of water-soluble pyrylium tetrachloroferrates (Py–Fes) were synthesized. Different photoluminescence properties of Py–Fes were simply tuned by changing the types and positions of substituent groups.