Thermally Activated and Nonactivated Excited State Decay of [Cr(dgpy)₂]³.

ABSTRACT: Photoactive and luminescent chromium(III) complexes are typically coordinated by aromatic N-heterocyclic chelate ligands such as polypyridines. Photoluminescence quantum yields and lifetimes can achieve up to 30% and several milliseconds, respectively. The effect of aliphatic N-donor ligands (guanidines) on the nonradiative decay of emissive doublet states remained, however, underexplored. Here, we describe the preparation, structure, redox chemistry, gas phase stability, and photophysical properties of the complex [Cr(dgpy)₂][PF₆]₃ with pyridine and guanidine donors (dgpy = 2,6-diguanidylpyridine). Variable-temperature luminescence spectroscopy, near-infrared overtone spectroscopy as well as quantum chemical calcul

SUBMITTER: Sittel S 

PROVIDER: S-EPMC12522133 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature