High-Spin State of a Ferrocene Electron Donor Revealed by Optical and X-ray Transient Absorption Spectroscopy.

ABSTRACT: Ferrocene is one of the most common electron donors, and mapping its ligand-field excited states is critical to designing donor-acceptor (D-A) molecules with long-lived charge transfer states. Although ³(d-d) states are commonly invoked in the photophysics of ferrocene complexes, mention of the high-spin ⁵(d-d) state is scarce. Here, we provide clear evidence of ⁵(d-d) formation in a bimetallic D-A molecule, ferrocenyl cobaltocenium hexafluorophosphate ([FcCc]PF₆). Femtosecond optical transient absorption (OTA) spectroscopy reveals two distinct electronic excited states with 30 and 500 ps lifetimes. Using a combination of ultraviolet, visible, near-infrared, and short-wave infrared probe pulses, we capture the spectral features of these states ov

SUBMITTER: Burke JH 

PROVIDER: S-EPMC11311227 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature