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Reactions Involving Cluster Ions
Author(s) -
Niles F. E.,
Heimerl J. M.,
Keller G. E.,
Puckett L. J.
Publication year - 1972
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs007i001p00117
Subject(s) - ion , alkali metal , reaction rate constant , chemistry , afterglow , analytical chemistry (journal) , photoionization , cluster (spacecraft) , ammonia , atomic physics , ionization , kinetics , physics , organic chemistry , gamma ray burst , chromatography , astronomy , quantum mechanics , computer science , programming language
Rate constants for room‐temperature reactions involving atmospheric cluster ions have been measured using two laboratory facilities: (1) a stationary afterglow facility employing photoionization and separate mass analysis for ions and neutrals, and (2) a drift tube facility employing thermionic emission of alkali ions and mass analysis of ions. In the afterglow facility, the sequence of reactions initiated by NO + ions reacting in a gaseous mixture of nitric oxide and water vapor and terminated by H 3 O + ·4H 2 O has been studied at 296°K with each rate constant measured independently. Likewise the sequence of reactions initiated by NO + ions reacting in a gaseous mixture of nitric oxide and ammonia and terminated by NH 4 ·3NH 3 has been studied at 296°K. In the drift tube facility, the clustering of atmospheric gases to the alkali ions Li + , Na + , and K + has been studied. From laboratory studies of the clustering of atmospheric gases to alkali ions, a map of the minimum values for initial clustering reaction rate constants and equilibrium constants has been drawn. The importance of the formation of a weakly bound cluster ion followed by a switching reaction to form a strongly bound cluster ion to the ion chemistry of the D region has been shown.