Gas phase ion/molecule reactions in monogermane-hydrocarbon mixtures: a comparative Fourier transform mass spectrometry and chemical ionization mass spectrometry study

Benzi, Paola; Operti, Lorenza; Vaglio, Gian Angelo; Volpe, P.; Speranza, Maurizio; Gabrielli, Roberto

doi:10.1016/0168-1176(90)85100-g

Cited by 42 publications

(30 citation statements)

References 22 publications

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] These investigations were aimed at extending the fundamental knowledge of ion-molecule reactions and their mechanisms. Moreover, an understanding of the ion chemistry of these systems can be useful in the improvement of the deposition of amorphous semiconductor films by radiolytic methods.…”

Section: Introductionmentioning

confidence: 99%

Gas Phase Ion−Molecule Reactions in Phosphine/Silane Mixtures

Antoniotti¹,

Operti²,

Ragazzoni³

et al. 1996

J. Phys. Chem.

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Phosphine/silane mixtures have been investigated by ion trap mass spectrometry, and reaction pathways together with rate constants of the main reactions are reported. Mechanisms of ion-molecule reactions have been elucidated by single and multiple isolation steps, and exact mass measurements have been performed by Fourier transform mass spectrometry. The SiH n + (n ) 0-3) ions react with phosphine to give SiPH n + (n ) 1-4) ions. These ions further react and yield SiP 2 H n + (n ) 2-5) and Si 2 PH n + (n ) 3-7) ions, which, in turn, react following different pathways with silane or phosphine to give Si 2 P 2 H n + (n ) 5, 6, 8) and Si 3 PH n + (n ) 5-7), respectively. Mixed SiPH n + (n ) 1-4) ions also originate from the PH n + (n ) 0, 1) phosphine primary ions, as well as from the P 2 H n + (n ) 0-3) secondary ions of phosphine. Protonation of phosphine from several ionic precursors is a very common process and yields the stable phosphonium ion, PH 4 + . Trends in total abundances of tertiary SiP 2 H n + (n ) 2-4) and Si 2 PH n + (n ) 3-7) ions as a function of reaction time for different PH 3 /SiH 4 pressure ratios show that excess of silane favors the nucleation of mixed Si-P ions. The mechanism and energetics of the reaction of Si + with PH 3 have been investigated by ab initio calculations, and the most stable structure of the SiPH + product, with a hydrogen bridge between silicon and phosphorus, has been identified.

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Section: Introductionmentioning

confidence: 99%

Gas Phase Ion−Molecule Reactions in Phosphine/Silane Mixtures

Antoniotti¹,

Operti²,

Ragazzoni³

et al. 1996

J. Phys. Chem.

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“…(iii) Interest in the mechanism for the formation of ions containing Ge−C bonds has motivated a number of studies involving GeH 4 with simple hydrocarbons 146 ions. Since reactions observed under chemical ionization conditions are promoted both by ions originating from GeH 4 and those from the corresponding carbon compound, the overall mechanism for these reactions is quite complex.…”

Section: A Thermochemistry Structure and Reactivity Related To The mentioning

confidence: 99%

“…, ethylene145 , allene146,150 and alkynes. Primary ions of germane undergo very slow reaction with methane and ethane and experiments carried out under methane or ethane chemical ionization conditions reveal the formation of small amounts of GeCH 5 + , GeCH 7 + and GeC 2 H 9 + as the result of tertiary reactions146 .…”

mentioning

confidence: 99%

Gas‐Phase Chemistry and Mass Spectrometry ofGe‐,Sn‐ andPb‐Containing Compounds

Riveros

Takashima

2009

Patai's Chemistry of Functional Groups

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Introduction Mass Spectrometry of Ge , Sn and Pb Derivatives Gas‐Phase Ion Chemistry Gas‐Phase Chemistry of Neutral Ge , Sn and Pb Species Acknowledgments

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“…[3][4][5] Understanding the nature of ion/molecule clustering reactions is an extremely important problem in the field of cluster chemistry, in particular the investigation of the chain propagation and the consequent cluster nucleation and growth.…”

Section: Introductionmentioning

confidence: 99%

“…Following previous studies dealing with 3 P ϩ and PH ϩ reacting with PH 3 , the quantum chemical study of these processes has been extended to the ion/molecule reactions starting from PH 2 ϩ and PH 3 ͑reaction a͒ or PH 3 ϩ and PH 3 ͑reaction b͒, as observed by ion trapping. In these experiments, PH 2 ϩ reacts to give P 2 H n ϩ (nϭ1,3) product ions, with loss of H 2 through different pathways.…”

mentioning

confidence: 99%