Dual fluorescence

{
  "id": "MLC-T-CHM-003466",
  "term": "Dual fluorescence",
  "field": "Chemistry",
  "definition": "The emission of light from two distinct excited states of a single fluorophore, resulting in two separate fluorescence bands in the emission spectrum. This phenomenon arises when a molecule can exist in two different excited-state conformations or electronic configurations that have distinct emission properties. An example is the emission from both locally excited and twisted intramolecular charge transfer (TICT) states.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "excited state",
    "fluorescence",
    "fluorophore",
    "ground state"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 327 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/dual-fluorescence/"
}