Abstract:
Ethoxy chromium (0) Fischer carbene pentacarbonyl complexes [(CO)5CrC(OEt)R]; R = 2-
thienyl (1), 2-furyl (2) were covalently anchored onto aminopropyltrimethoxysilanefunctionalised
silicon-wafers to form Cr-grafted Si-wafers S1 and S2 that were characterized
by X-ray photoelectron spectroscopy (XPS). X-ray photoelectron spectroscopy determined
that binding energy of the Cr 2p3/2 photoelectron line of the thienyl-containing complexes
were smaller than that of the furyl-containing complexes. The binding energy of the Cr 2p3/2
photoelectron line of the ethoxycarbene complexes was smaller than that of aminocarbenes.
The binding energy of the Cr 2p3/2 photoelectron line of the Cr-grafted Si-wafers were ca. 1
eV higher than that of the related aminocarbenes. A 25 – 33 % anchoring of the Crcomplexes
1 and 2 on the aminopropyltrimethoxysilane-functionalised silicon-wafers was
achieved.
