H/D-Isotope sensitive dual fluorescence of the corrin-ligand of vitamin B₁₂.

ABSTRACT: The photoexcited state of the corrin-ligand of vitamin B₁₂ is an old puzzle. We show here that the metal-free corrin-ligand emits dual fluorescence in its singlet excited state. As a specific consequence of the asymmetry of the natural corrin-ligand, its strongly emitting singlet excited state exists as a pair of isomers that interconvert rapidly in an unprecedented H/D-Isotope sensitive way in competition with their fluorescent decay.

SUBMITTER: Jockusch S 

PROVIDER: S-EPMC11816046 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature