Photoadsorption centre

{
  "id": "MLC-T-CHM-008798",
  "term": "Photoadsorption centre",
  "field": "Chemistry",
  "definition": "A specific site on the surface of a material that becomes active for adsorbing a molecule upon electronic excitation by light. This transient site is created when the material absorbs a photon, leading to a localized change in electronic structure that facilitates the binding of an adsorbate. The lifetime of such a centre is finite, and it reverts to its inactive state after the adsorbed molecule desorbs or the electronic excitation decays.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "active state"
  ],
  "references": [
    "PAC, 2011, 83, 931. 'Glossary of terms used in photocatalysis and radiation catalysis (IUPAC Recommendations 2011)' on page 965 (https://doi.org/10.1351/PAC-REC-09-09-36)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photoadsorption-centre/"
}