Dissociative Adsorption of 3-Chloropropyne on Si(111)-(7 × 7): Binding and Structure

Abstract

To achieve silicon functionalization for the development of hybrid devices, multifunctional molecules may be employed to attach to the silicon surfaces. It is important to get a fundamental understanding about the molecule/silicon interface chemistry and the binding configuration. The surface chemistry of 3-chloropropyne (HC≡C-CH(2)Cl) on the Si(111)-(7 × 7) surface, as a model system for understanding the interaction of the multifunctional molecules with a silicon surface, was studied by X-ray photoelectron spectroscopy (XPS), high-resolution electron energy loss spectroscopy (HREELS), and density functional theory (DFT). The 3-chloropropyne adsorbs molecularly on the silicon surface at 110 K. A chemical reaction clearly occurs such that 3-choloropropyne bonds onto the Si(111)-(7 × 7) surface at room temperature by forming C-Si linkage through the cleavage of C-Cl bond, and preserving the ethyne C≡C triple bond. This functionalized silicon surface may act as an intermediate for the growth of multiple organic layers by further attaching other functional molecules.

Grafting alkynyl groups on the surface of nano‐aramid fibers towards flame retardant thermoplastic polyurethane

“…25 Unfortunately, the compatibility of untreated ANF with TPU is still unchanged. 3-Chloropropyne (PC) is widely used as an intermediate for organic synthesis and the acetylene group is retained in the binding configuration with other substances, and the acetylene group can be used as an intermediate to link other functional molecules, 26 which can improve the dispersion of compatibility of ANF within TPU. As the proton of the amide bond on ANF is removed after deprotonation, PC is able to attach to the amide bond of ANF via covalent bonding interaction.…”

Adsorption of formic acid on Si(111)7 × 7 at room temperature: a valence band photoemission and Si2p photodesorption study

“…As for the adsorption of molecules on silicon surfaces, there has been a considerable amount of studies, using several approaches both computational and experimental, on several surfaces reconstruction, clean or hydrogen terminated and as a function of temperature …”

“…As for the adsorption of molecules on silicon surfaces, there has been a considerable amount of studies, using several approaches both computational [10,11] and experimental, [12][13][14][15] on several surfaces reconstruction, clean or hydrogen terminated [16][17][18][19] and as a function of temperature. [20,21] In spite of the large efforts, these studies were not always conclusive, and some questions are still open.…”