Chemical control of competing electron transfer pathways in iron tetracyano-polypyridyl photosensitizers.

ABSTRACT: Photoinduced intramolecular electron transfer dynamics following metal-to-ligand charge-transfer (MLCT) excitation of [Fe(CN)₄(2,2'-bipyridine)]^2- (1), [Fe(CN)₄(2,3-bis(2-pyridyl)pyrazine)]^2- (2) and [Fe(CN)₄(2,2'-bipyrimidine)]^2- (3) were investigated in various solvents with static and time-resolved UV-Visible absorption spectroscopy and Fe 2p3d resonant inelastic X-ray scattering (RIXS). This series of polypyridyl ligands, combined with the strong solvatochromism of the complexes, enables the ¹MLCT vertical energy to be varied from 1.64 eV to 2.64 eV and the ³MLCT lifetime to range from 180 fs to 67 ps. The ³MLCT lifetimes in 1 and 2 decrease exponentiall

SUBMITTER: Kunnus K 

PROVIDER: S-EPMC8159445 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature