Infrared vibrational spectroscopy of isotopically labeled ethyl-terminated Si(111) surfaces prepared using a two-step chlorination/alkylation procedure

Erik Johansson; Patrick T. Hurley; Bruce S. Brunschwig; Nathan S Lewis

doi:10.1021/jp901792y

Infrared vibrational spectroscopy of isotopically labeled ethyl-terminated Si(111) surfaces prepared using a two-step chlorination/alkylation procedure

Erik Johansson, Patrick T. Hurley, Bruce S. Brunschwig, Nathan S Lewis

California Institute of Technology

Research output: Contribution to journal › Article

22 Citations (Scopus)

Abstract

Fourier transform infrared (FTIR) spectroscopy was used to investigate C₂H₅-Si(111) surfaces prepared using a chlorination/alkylation method. After alkylation, in addition to ethyl groups, such surfaces showed the presence of hydrogen bonded to atop silicon surface atoms. Systematic isotopic substitution of protic solvents and reagents with their fully or partially deuterated counterparts revealed the origin of the surface-bound hydrogen on the C₂H₅-Si(111) surfaces. The presence or absence of the Si-H stretch at 2080 cm^-1 and the Si-D stretch at ∼1510 cm^-1, respectively, indicated that the hydrogen originated from the methyl group of the ethyl Grignard reagent.

Original language	English
Pages (from-to)	15239-15245
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	113
Issue number	34
DOIs	https://doi.org/10.1021/jp901792y
Publication status	Published - Aug 27 2009

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ASJC Scopus subject areas

Physical and Theoretical Chemistry
Electronic, Optical and Magnetic Materials
Surfaces, Coatings and Films
Energy(all)

Cite this

Johansson, E., Hurley, P. T., Brunschwig, B. S., & Lewis, N. S. (2009). Infrared vibrational spectroscopy of isotopically labeled ethyl-terminated Si(111) surfaces prepared using a two-step chlorination/alkylation procedure. Journal of Physical Chemistry C, 113(34), 15239-15245. https://doi.org/10.1021/jp901792y

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abstract = "Fourier transform infrared (FTIR) spectroscopy was used to investigate C2H5-Si(111) surfaces prepared using a chlorination/alkylation method. After alkylation, in addition to ethyl groups, such surfaces showed the presence of hydrogen bonded to atop silicon surface atoms. Systematic isotopic substitution of protic solvents and reagents with their fully or partially deuterated counterparts revealed the origin of the surface-bound hydrogen on the C2H5-Si(111) surfaces. The presence or absence of the Si-H stretch at 2080 cm-1 and the Si-D stretch at ∼1510 cm-1, respectively, indicated that the hydrogen originated from the methyl group of the ethyl Grignard reagent.",

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AB - Fourier transform infrared (FTIR) spectroscopy was used to investigate C2H5-Si(111) surfaces prepared using a chlorination/alkylation method. After alkylation, in addition to ethyl groups, such surfaces showed the presence of hydrogen bonded to atop silicon surface atoms. Systematic isotopic substitution of protic solvents and reagents with their fully or partially deuterated counterparts revealed the origin of the surface-bound hydrogen on the C2H5-Si(111) surfaces. The presence or absence of the Si-H stretch at 2080 cm-1 and the Si-D stretch at ∼1510 cm-1, respectively, indicated that the hydrogen originated from the methyl group of the ethyl Grignard reagent.

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10.1021/jp901792y