Rotational relaxation time

{
  "id": "MLC-T-CHM-010429",
  "term": "Rotational relaxation time",
  "field": "Chemistry",
  "definition": "The characteristic time constant for a molecule's rotational motion to return to equilibrium after a perturbation, such as absorption of polarized light. This time is inversely proportional to the rotational diffusion coefficient and depends on the molecule's size, shape, and the viscosity of its environment. It is often measured using techniques like time-resolved fluorescence anisotropy.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "debye",
    "rotational diffusion coefficient"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 416 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/rotational-relaxation-time/"
}