The gas-phase ion chemistry of the silane/propyne mixture was studied by ion trap mass spectrometry with the aim of finding the best experimental conditions leading to the formation of Si- and C-containing ion clusters of increasing size. To this purpose, the optimal pressure ratio among the two gases was about 1:1. Ion/molecule reactions were investigated and rate constants determined for propyne alone and for the silane/propyne systems. In these systems, several mixed ions were formed; in particular, the Si2CH5+ ion species is obtained and reaches 20% abundance after 1s reaction time under the experimental conditions used here.
Gas-phase ion chemistry in silane/propyne mixtures
OPERTI, Lorenza;RABEZZANA, Roberto;TURCO, Francesca;VAGLIO, Gian Angelo
2003-01-01
Abstract
The gas-phase ion chemistry of the silane/propyne mixture was studied by ion trap mass spectrometry with the aim of finding the best experimental conditions leading to the formation of Si- and C-containing ion clusters of increasing size. To this purpose, the optimal pressure ratio among the two gases was about 1:1. Ion/molecule reactions were investigated and rate constants determined for propyne alone and for the silane/propyne systems. In these systems, several mixed ions were formed; in particular, the Si2CH5+ ion species is obtained and reaches 20% abundance after 1s reaction time under the experimental conditions used here.
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