Published August 27, 2009
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Infrared Vibrational Spectroscopy of Isotopically Labeled Ethyl-Terminated Si(111) Surfaces Prepared Using a Two-Step Chlorination/Alkylation Procedure
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Abstract
Fourier transform infrared (FTIR) spectroscopy was used to investigate C_2H_5−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 C_2H_5−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.
Additional Information
© 2009 American Chemical Society. Received: February 26, 2009; Revised Manuscript Received: June 22, 2009. Publication Date (Web): July 31, 2009. We thank Dr. Katherine Plass for helpful discussions. We gratefully acknowledge the National Science Foundation (CHE-0604894) and the Molecular Materials Research Center in the Beckman Institute at Caltech for support of this work. Supporting Information: Subtraction results of the C−H stretching region for 1,1-d2-ethyl-Si(111) and 2,2,2-d3-ethyl-Si(111). Subtraction result of the two spectra in Figure 6 and the C−H stretching region of the subtraction result of the spectra from C_2D_5−Si(111) surfaces synthesized using either all protic or all deuterated solvents. This information is available free of charge via the Internet at http://pubs.acs.org.Attached Files
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Additional details
- Eprint ID
- 15458
- Resolver ID
- CaltechAUTHORS:20090828-231035223
- NSF
- CHE-0604894
- Caltech Beckman Institute
- Created
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2009-09-09Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field