Tetra-s attachment of allyl cyanide on Si„111...-7Ã7
نویسندگان
چکیده
The investigation of allyl cyanide adsorption on Si(111)-737 using high-resolution electron-energy-loss spectroscopy ~HREELS!, x-ray photoelectron spectroscopy ~XPS!, and ultraviolet photoelectron spectroscopy ~UPS! reveals a tetra-s binding mode through two @212#-like cycloaddition reactions. The HREELS spectra of chemisorbed monolayer show the absence of CvC, CwN, and C(sp)uH stretching modes coupled with the appearance of CvN stretching mode at ;1590 cm, demonstrating that both the CvC and CwN of allyl cyanide directly participate in binding with the surface to form C—C and CvN bonds, respectively. This binding configuration was further confirmed in our XPS and UPS studies. The imine-containing skeleton formed on the surface can possibly be employed as a molecular template for a further modification of Si surfaces and syntheses in vacuum.
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