Formation and dissociation of triply charged fragment ions of benzene

Abstract

Electron impact ionization of small singly charged hydrocarbon ions was applied to produce and investigate multiply charged molecular ions. The stability of triply charged hydrocarbon ions depends strongly on the number of hydrogen atoms of the molecule. C4Hj3+ were observed only for molecules that contain more than 2 hydrogen atoms. Parallel, highly correlated ab initio calculations were performed for these molecular ions. The binding energies obtained by these computations agree well with the experimental findings. Moreover, there is quantitative agreement between the experiment and the calculations on the kinetic energy of the fragment ions upon Coulomb explosion.

Tungsten nitride thin films deposited by MOCVD: sources of carbon and effects on film structure and stoichiometry

“…The formation of C 6 H 4 and H 2 by benzene (C 6 H 6 ) adsorption on Ir(1 0 0) [36] and Mo(1 1 0) [37] has been reported, and may explain why C 6 H 6 was not observed with the RGA. For deposition with 1,2-DCB, peaks are again observed at m=z=2, 26 and 36 along with readings at m=z ¼ 50 and 75, which are consistent with formation of C 4 H 2 and C 6 H 3 , respectively [34,38]. Fig.…”

Kinetic-energy release in Coulomb explosion of metastable C3H52+

“…It has been applied to several systems that are unstable with respect to Coulomb explosion, prepared by charge stripping, photon or electron impact ionization of singly charged precursors. 1,9 Other reports pertain to metastable decay of doubly charged molecules [10][11][12][13] and clusters. 14 In the present work we analyze spontaneous ͑metastable͒ Coulomb explosion of C 3 H 5 2ϩ which is formed by electron impact ionization of propane.…”