title: A [4+2]-like cycloaddition of methyl methacrylate on Si(100)-2 x 1.
abstract: The attachment of methyl methacrylate (MMA) on Si(100)-2x1 was investigated using high-resolution electron energy loss spectroscopy (HREELS), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), and density functional theory (DFT) calculations. The HREELS spectra of chemisorbed MMA show the disappearance of characteristic vibrations of C=O (1725 cm(-1)) and C(sp(2))-H (3110, 1400, and 962 cm(-1)) coupled with the blue shift of the C=C stretching mode by 34 cm(-1) compared to those of physisorbed molecules. These results clearly demonstrate that both C=C and C=O in MMA directly participate in the interaction with the surface to form a SiCH(2)C(CH(3))=C(OCH(3))OSi species via a [4+2]-like cycloaddition. This binding configuration was further supported by XPS, UPS, and DFT studies.
authors.affiliation: Department of Chemistry, National University of Singapore.
authors.forename: Jing Yan
authors.initials: JY
authors.lastname: Huang
authors.forename: Hai Gou
authors.initials: HG
authors.lastname: Huang
authors.forename: Yue Sheng
authors.initials: YS
authors.lastname: Ning
authors.forename: Qi Ping
authors.initials: QP
authors.lastname: Liu
authors.forename: Solhe F
authors.initials: SF
authors.lastname: Alshahateet
authors.forename: Yue Ming
authors.initials: YM
authors.lastname: Sun
authors.forename: Guo Qin
authors.initials: GQ
authors.lastname: Xu