Self-quenching

{
  "id": "MLC-T-CHM-010713",
  "term": "Self-quenching",
  "field": "Chemistry",
  "definition": "The reduction in the fluorescence or phosphorescence quantum yield of a substance due to interactions between excited-state molecules of the same species. This process occurs at higher concentrations where excited molecules can transfer energy to ground-state molecules, leading to non-radiative deactivation. It is a concentration-dependent phenomenon.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "quenching",
    "Stern-Volmer kinetic relationships",
    "ground state"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2273 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/self-quenching/"
}