Photochromism

{
  "id": "MLC-T-CHM-013395",
  "term": "Photochromism",
  "field": "Chemistry",
  "definition": "A reversible transformation of a chemical species between two forms, induced by electromagnetic radiation, where the two forms have different absorption spectra. This change involves a light-induced alteration in the molecular structure, which can be reversed either thermally or by irradiation with light of a different wavelength. Photochromic materials are used in applications such as ophthalmic lenses and optical data storage.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "irradiation",
    "stable",
    "transformation",
    "visible"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 387 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photochromism/"
}