Reactions of Na+, K+, and Ba+ Ions with O2, NO, and H2O Molecules

Abstract

Ion–molecule reactions of sodium, potassium, and barium ions with O2, NO, and H2O have been studied in a drift tube–mass spectrometer apparatus. The following rate constants or upper limits were obtained: Na+,K, +, Ba++O2(NO)→products, k < 10−13cm3/sec (0.04 − ∼ 5 eV), Na++H2O+M→Na+·H2O+M, k(3) = 1.0(+ 0.5, − 0.3) × 10−28cm6/secfor M = H2O, k(3) = 4.7(+ 1.2, − 1.0) × 10−30cm6/secfor M = He, K++H2O+M→K+·H2O+M, k(3) = 4.5(+ 2.3, − 1.5) × 10−29cm6/secfor M = H2O, k(3) = 2.6(+ 0.7, − 0.5) × 10−30cm6/secfor M = He. The consequences of these results for the D and E region of the upper atmosphere are briefly described.

A Theoretical Study of the Ion−Molecule Chemistry of K+·X Complexes (X = O, O2, N2, CO2, H2O): Implications for the Upper Atmosphere

“…The results are listed in Table . Note that the estimated value of k 5 is in accord with an upper limit of 2 × 10 -30 cm 3 molecule -1 s -1 measured in a drift tube experiment . For the association of K + and O, k 6 was estimated using the same parameters for 〈Δ E 〉 down and n .…”

Gas‐Phase Reactions of Atomic Lanthanide Cations with D2O: Room‐Temperature Kinetics and Periodicity in Reactivity

“…Surprisingly, to the best of our knowledge, there are no previous reports on the reactions of Ln + with water, although gas‐phase reactions between water and other metal cations have been surveyed by several groups 16. As early as 1971, Biondi et al17 reported the first measurement of the reactions of K + and Na + with water. Reactions of first‐row transition metal cations with water have been surveyed by the Armentrout research group16b, 18 using guided ion‐beam mass spectrometry.…”

Application of laser ablation inductively coupled plasma (dynamic reaction cell) mass spectrometry for depth profiling analysis of high-tech industrial materials

“…However, a systematic study of the literature for bimolecular gas phase cation-molecule reaction kinetics 16 revealed that O 2 could be used as an alternative to NH 3 for the interference-free or at least less-interfered determination of K 1 . Indeed, while K 1 shows no reactivity towards O 2 , 17 the reaction of the interfering ArH 1 with O 2 is thermodynamically allowed and fast. 15 Under optimised conditions, the signal-tobackground-ratio for K could also be improved by a factor of 20 by using O 2 .…”