Photochemical funnel

{
  "id": "MLC-T-CHM-008819",
  "term": "Photochemical funnel",
  "field": "Chemistry",
  "definition": "A region on a potential energy surface where two or more electronic states become degenerate or nearly degenerate, facilitating rapid non-radiative decay. This intersection allows for efficient conversion of electronic excitation energy into vibrational energy, leading to radiationless deactivation. Such funnels are often associated with conical intersections between excited and ground electronic states.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "conical intersection",
    "ground state",
    "singlet-triplet crossing"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 385 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photochemical-funnel/"
}