Cover Feature: Molecular Basis of the Chemiluminescence Mechanism of Luminol (Chem. Eur. J. 20/2019).

Quantum‐chemistry determinations of the luminol chemiluminescence mechanism have made it possible to: first, clarify the spin inversion of the reaction; secondly, to determine the concerted nature of the two steps of 3O2 addition and 1N2 elimination; thirdly, to answer why such oxygen by nitrogen substitution must occur for an efficient excited‐state population; fourthly, to describe the electronic‐structure properties of the chemiexcitation; and finally, to distinguish the paths producing light emission versus those giving rise to radiationless decay. More information can be found in the Full Paper by A. Giussani, D. Roca‐Sanjuán, et al. on page 5202. [ABSTRACT FROM AUTHOR]