Infrared spectrum of the silicon hydride cation SiH7 PLU

Yibin Cao, Jong-Ho Choi, Bernd Michael Haas, Matthew S. Johnson, Mitchio Okumura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Silanium ions are an important class of hypervalent molecules, and the determination of their structure will yield insights into the nature of nonclassical bonding and provide a contrast to the bonding in carbonium ions. We report the infrared spectrum of the mass-selected silicon hydride cluster ion 28SiH7 +, detected by vibrational predissociation spectroscopy. Silanium ions were formed in a pulsed high pressure glow discharge and cooled by the subsequent supersonic expansion. Photodissociation spectra were obtained using a tandem time-of-flight mass spectrometer: SiH7 + ions were mass-selected and excited by a tunable infrared laser. The resulting photofragments were detected using a reflectron as a mass analyzer. We observed a vibrational band at 3865 cm-1, which was the only one observed from 3500 cm-1 to 4200 cm-1. This result suggests that the molecule might form a symmetric complex with the structure H 2·SiH3 +·H2, in contrast to the species CH 7 +, which has the structure CH5 +·H2.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Place of PublicationBellingham, WA, United States
PublisherPubl by Int Soc for Optical Engineering
Pages326-331
Number of pages6
Volume1858
ISBN (Print)0819410853
Publication statusPublished - 1993 Dec 1
Externally publishedYes

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Silanes
Positive ions
Infrared radiation
Ions
Photodissociation
Vibrational spectroscopy
Molecules
Infrared lasers
Glow discharges
Mass spectrometers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Cao, Y., Choi, J-H., Haas, B. M., Johnson, M. S., & Okumura, M. (1993). Infrared spectrum of the silicon hydride cation SiH7 PLU In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 1858, pp. 326-331). Bellingham, WA, United States: Publ by Int Soc for Optical Engineering.

Infrared spectrum of the silicon hydride cation SiH7 PLU . / Cao, Yibin; Choi, Jong-Ho; Haas, Bernd Michael; Johnson, Matthew S.; Okumura, Mitchio.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 1858 Bellingham, WA, United States : Publ by Int Soc for Optical Engineering, 1993. p. 326-331.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cao, Y, Choi, J-H, Haas, BM, Johnson, MS & Okumura, M 1993, Infrared spectrum of the silicon hydride cation SiH7 PLU in Proceedings of SPIE - The International Society for Optical Engineering. vol. 1858, Publ by Int Soc for Optical Engineering, Bellingham, WA, United States, pp. 326-331.
Cao Y, Choi J-H, Haas BM, Johnson MS, Okumura M. Infrared spectrum of the silicon hydride cation SiH7 PLU In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 1858. Bellingham, WA, United States: Publ by Int Soc for Optical Engineering. 1993. p. 326-331
Cao, Yibin ; Choi, Jong-Ho ; Haas, Bernd Michael ; Johnson, Matthew S. ; Okumura, Mitchio. / Infrared spectrum of the silicon hydride cation SiH7 PLU Proceedings of SPIE - The International Society for Optical Engineering. Vol. 1858 Bellingham, WA, United States : Publ by Int Soc for Optical Engineering, 1993. pp. 326-331
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