Zero-zero absorption or emission

{
  "id": "MLC-T-CHM-012806",
  "term": "Zero-zero absorption or emission",
  "field": "Chemistry",
  "definition": "The electronic transition between the lowest vibrational level of the ground electronic state and the lowest vibrational level of an excited electronic state. This transition corresponds to the pure electronic energy difference between the two states, without any change in vibrational energy. It typically appears as the highest energy (shortest wavelength) band in an emission spectrum or the lowest energy (longest wavelength) band in an absorption spectrum.",
  "synonyms": [
    "0-0 absorption",
    "0-0 emission",
    "zero-zero absorption",
    "zero-zero emission"
  ],
  "subject": "Organic and Biomolecular Chemistry",
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2284 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/zero-zero-absorption-or-emission/"
}