Novel Y-type two-photon active fluorophore: synthesis and application in fluorescent sensor for cysteine and homocysteine

A novel Y-shaped two-photon active material FD3 based on the imidazole core has been synthesized and exhibited intense two-photon excited fluorescence with two-photon absorption cross-section of more than 9000 GM. Importantly, FD3 could be used as a potential two-photon excited fluorescent sensor for cysteine and homocysteine.

A novel heterocycle-based Y-shaped two-photon active material, which shows intense single- and two-photon excited fluorescence, has been synthesized and investigated as a potential fluorescent sensor for cysteine and homocysteine.