Identification of metal-centered excited states in Cr(iii) complexes with time-resolved L-edge X-ray spectroscopy.

ABSTRACT: New coordination complexes of 3d metals that possess photoactive metal-centered (MC) excited states are promising targets for optical applications and photocatalysis. Ultrafast spectroscopy plays an important role in elucidating the photophysical mechanisms that underlie photochemical activity. However, it can be difficult to assign transient signals to specific electronic excited states and mechanistic information is often inferred from kinetics. Here it is demonstrated that 3d L-edge X-ray absorption spectroscopy is highly selective for MC excited states. This is accomplished by probing the ²E spin-flip excited state in Cr(acac)₃ using synchrotron-based picosecond time-resolved XAS in solution. This excited state of Cr(iii) has the property that its potential is nes

SUBMITTER: Ghodrati N 

PROVIDER: S-EPMC11895842 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature