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Negative gas‐phase ion chemistry of silane: a quadrupole ion trap study
Author(s) -
Operti Lorenza,
Rabezzana Roberto,
Vaglio Gian Angelo
Publication year - 2006
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.2662
Subject(s) - chemistry , silane , ion trap , ion , quadrupole ion trap , mass spectrum , dehydrogenation , condensation , cluster (spacecraft) , mass spectrometry , quadrupole , analytical chemistry (journal) , silicon , molecule , inorganic chemistry , atomic physics , organic chemistry , catalysis , chromatography , physics , computer science , thermodynamics , programming language
Silicon clusters are of considerable interest for their importance in astrophysics and chemical vapour deposition processes, as well as from a fundamental point of view. Here, we present a quadrupole ion trap study of the self‐condensation ion/molecule reactions of anions of silane. In the high‐pressure regime, several ion clusters are formed with increasing size: the largest ions detected are Si 5 H n −(n = 0–3). Selective ion isolation and storage allowed detection of the main reaction sequences occurring in the reacting system. The most frequent condensation step is followed by single or multiple dehydrogenation, this latter being particularly observed for the high‐mass reactant ions. As a consequence, the most abundant ions in the mass spectra are those with a low content of hydrogen, namely Si 2 H − , Si 3 H − , and Si 4 H − . These results are discussed with reference to literature data on silicon cluster anions and related systems. Copyright © 2006 John Wiley & Sons, Ltd.