Free ion

{
  "id": "MLC-T-CHM-004654",
  "term": "Free ion",
  "field": "Chemistry",
  "definition": "An ion that exists independently in a solution or gas phase, not associated with a counterion to form an ion pair or larger aggregate. In polymerization, free ions are highly reactive species that can initiate or propagate chain growth. Their concentration is influenced by solvent polarity and temperature.",
  "subject": "Polymer",
  "references": [
    "PAC, 2008, 80, 2163. 'Glossary of terms related to kinetics, thermodynamics, and mechanisms of polymerization (IUPAC Recommendations 2008)' on page 2175 (https://doi.org/10.1351/pac200880102163)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/free-ion/"
}