Phosphorescence

{
  "id": "MLC-T-CHM-008786",
  "term": "Phosphorescence",
  "field": "Chemistry",
  "definition": "A type of luminescence where energy absorbed by a substance is re-emitted slowly as light. This occurs when electrons transition from an excited triplet state to the ground singlet state, a spin-forbidden process that results in a relatively long emission lifetime. The emitted light persists after the excitation source is removed.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "doublet state",
    "luminescence",
    "photochemistry",
    "quartet state"
  ],
  "references": [
    "PAC, 1984, 56, 231. 'Nomenclature, symbols, units and their usage in spectrochemical analysis-Part VI: molecular luminescence spectroscopy' on page 233 (https://doi.org/10.1351/pac198456020231)",
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2258 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/phosphorescence/"
}