Mechanistic study on photo-reaction of coumarin based caged compounds with D-π-D stilbene structure

摘要

Caged compounds with high two-photon absorption (TPA) character in near infrared region (650~1050 nm) are useful for understanding the role of bioactive compounds in deeper area of living tissues . In our previous study, 7-diethylamino coumarin-4yl methyl (DEACM) type caged benzoic acid (1) with D-π-D stilbene structure have been prepared to possess a TPA cross-section σ2 of ~7 GM at 750 nm, which is corresponding to S0 to S1 electronic transition .