Novel photosystem involving protonation and deprotonation processes modelled on a PYP photocycle†
Abstract
The synthesis of novel ortho-coumaric acid derivatives, with an amide group linked with an olefin moiety, which introduced photoinduced switching of the intramolecular hydrogen bonds is presented. An intramolecular OH⋯OC hydrogen bond formed in a Z-phenol compound was switched to an intramolecular NH⋯O hydrogen bond in Zphenolate state via deprotonation. The pKa value of the Z-phenol derivative was lower than that of