Photoinduced radical polymerization by methyl fluoresceins under visible light and the application to signal amplification of hydrogen peroxide

We investigate visible‒light‒induced radical polymerization initiated by methyl fluorescein and its derivatives (e.g., methyl ether of fluorescein, methyl ether ester of fluorescein, and methyl ester of fluorescein), which act as photoredox catalysts. The structural alterations of fluorescein noticeably affect their photoredox catalytic performance, which increases in the following order: methyl ether of fluorescein