Formation of Highly Ordered Terminal Alkyne Self-Assembled Monolayers on the Au{111} Surface through Substitution of 1-Decaboranethiolate
- Shenkai WangShenkai WangDepartment of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United StatesMore by Shenkai Wang
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- Dominic P. GoronzyDominic P. GoronzyDepartment of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United StatesMore by Dominic P. Goronzy
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- Thomas D. YoungThomas D. YoungDepartment of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United StatesMore by Thomas D. Young
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- Natcha WattanatornNatcha WattanatornDepartment of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United StatesMore by Natcha Wattanatorn
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- Logan StewartLogan StewartDepartment of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United StatesMore by Logan Stewart
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- Tomáš Baše*Tomáš Baše*E-mail: [email protected] (T.B.).Institute of Inorganic Chemistry, The Czech Academy of Sciences, Husinec-Řež 250 68, Czech RepublicMore by Tomáš Baše
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- Paul S. Weiss*Paul S. Weiss*E-mail: [email protected] (P.S.W.).Department of Chemistry and Biochemistry, California NanoSystems Institute and Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United StatesMore by Paul S. Weiss
Abstract
The reaction aimed at completing and closing the open cages of 1-decaboranethiol self-assembled monolayers (SAMs) on Au{111} with 4-phenyl-1-butyne results in highly ordered monolayers of 4-phenyl-1-butyne. The initially disordered 1-decaboranethiolate changed into ordered (√3×√3)R 30° lattices on Au{111} typical of alkyne SAMs, indicating the complete substitution of 1-decaboranethiolate moieties, as determined by nanoscale imaging with scanning tunneling microscopy and X-ray photoelectron spectroscopy. Vibrational spectroscopy results indicate that the process happens gradually and that alkynyl groups are not totally oxidized in the ordered 4-phenyl-1-butyne monolayer.
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