Bathochromic shift

{
  "id": "MLC-T-CHM-001144",
  "term": "Bathochromic shift",
  "field": "Chemistry",
  "definition": "The shift of a spectral band in the absorption, emission, or fluorescence spectrum of a chemical compound to a longer wavelength, corresponding to a lower frequency. This phenomenon, also known as a red shift, is caused by a change in the chemical environment or molecular structure, such as substitution or a change in solvent polarity. A bathochromic shift indicates a decrease in the energy gap between the electronic states involved in the transition.",
  "synonyms": [
    "bathochromic effect"
  ],
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "blue shift",
    "hypsochromic shift",
    "red shift"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1088 (https://doi.org/10.1351/pac199466051077)",
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2230 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/bathochromic-shift/"
}