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|Title:||Si-C(N) σ Linkages and N → Si Dative Bonding at Pyridine/Si(111)-7 × 7|
|Citation:||Tao, F., Lai, Y.H., Xu, G.Q. (2004-01-20). Si-C(N) σ Linkages and N → Si Dative Bonding at Pyridine/Si(111)-7 × 7. Langmuir 20 (2) : 366-368. ScholarBank@NUS Repository.|
|Abstract:||We experimentally demonstrated that pyridine/Si(111)-7×7 can act as an electron donor/acceptor pair as a result of the charge transfer from the electron-rich N atom of pyridine to the electron-deficient adatom of the Si surface, evidenced by the upshift of 1.8 eV (state A) for the N(1s) core level upon the formation of a datively bonded complex compared to physisorbed molecules. Another state (B) whose N(1s) binding energy downshifts by 1.2 eV was assigned to an adduct through Si-C and Si-N covalent linkages, formed via a [4 + 2]-like addition mechanism on Si(111)-7 × 7. Binding molecules through the formation of the dative bond resulted from significant electron transfer opens a new approach for the creation of Si-based molecular architectures and modification of semiconductor interfacial properties with unsaturated organic molecules.|
|Appears in Collections:||Staff Publications|
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