Photochemistry of P,N-bidentate rhenium(i) tricarbonyl complexes: reactive species generation and potential application for antibacterial photodynamic therapy.

ABSTRACT: In this work, we describe the photoisomerization of facial rhenium(i) tricarbonyl complexes bearing P,N-bidentate pyridyl/phosphine ligands with different chelating rings and anions: RePNBr, RePNTfO, and RePNNBr, which are triggered under irradiation at 365 nm in solutions. The apparent photodegradation rate constants (k _app) depend on the coordinating ability of the solvent, being lowest in acetonitrile. The k _app value increases as the temperature rises, suggesting a reactive IL excited state thermally populated from the MLCT excited state involved. Using the Eyring equation, positive activation enthalpies (ΔH ^≠) accompanied by high negative values for the activation entropy (ΔS ^≠) were obtained. These results sugges

SUBMITTER: Acosta A 

PROVIDER: S-EPMC9041655 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature