Rotational correlation time

{
  "id": "MLC-T-CHM-010422",
  "term": "Rotational correlation time",
  "field": "Chemistry",
  "definition": "The average time a molecule takes to rotate through an angle of one radian. This parameter reflects the rate at which a molecule reorients itself in solution due to Brownian motion. It is a key factor in nuclear magnetic resonance (NMR) spectroscopy and fluorescence anisotropy measurements, providing insights into molecular size and viscosity of the medium.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "einstein",
    "stokes",
    "anisotropy",
    "emission anisotropy",
    "fluorescence",
    "fluorophore",
    "gas constant",
    "phosphorescence",
    "polarization",
    "rotational diffusion coefficient",
    "rotational relaxation time"
  ],
  "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-correlation-time/"
}