Combined X‐Ray Emission Spectroscopy at Phosphorus and Nickel: Detecting Subtle Changes in Catalyst Electronic Structure at High Resolution (Small 37/2025)

Valence Electronic Structures In article number 2505199, Zachary Mathe and Serena DeBeer introduced phosphorus valence-to-core X-ray emission spectroscopy as a highly sensitive, spin- and metal-agnostic probe of valence electronic structure in bisphosphine catalysts. Calculations with density functional theory accurately reproduce difference spectra of similar species and provide structure-spectrum relationships. Combined spectroscopy and calculations offers a promising program for investigation of catalytic mechanisms.