Chemi-ionization

Not to be confused with chemical ionization.

Chemi-ionization is the formation of an ion through the reaction of a gas phase atom or molecule with an atom or molecule in an excited state.^[1][2]

Reactions

Chemi-ionization can be represented by

$G^* + M \to M^{+\bullet} + e^- + G$

where G is the excited state species (indicated by the superscripted asterisk), and M is the species that is ionized by the loss of an electron to form the radical cation (indicated by the superscripted "plus-dot").

See also

• Penning ionization
• Associative ionization
• Charge-exchange ionization

References

1. ^ IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version:  (2006–) "chemi-ionization". C01044
2. ^ Klucharev, A. N. (1993), "Chemi-ionization processes", Physics-Uspekhi 36: 486, Bibcode 1993PhyU...36..486K, doi:10.1070/PU1993v036n06ABEH002162