The feasibility of creating atomic wires on vicinal silicon surfaces via pseudomorphic step-edge decoration has been analyzed for the case of Ga on Si(112). Scanning tunneling microscopy and density functional theory calculations indicate the formation of Ga zigzag chains intersected by quasiperiodic vacancy lines or "misfit dislocations." This structure strikes a balance between the system's d...

A new method for the catalytic didehydroxylation of vicinal diols is described. Employing a readily available low-valent rhenium carbonyl complex and a simple alcohol as a reducing agent, both terminal and internal vicinal diols are deoxygenated to olefins in good yield. The optional addition of acid (TsOH, H(2)SO(4)) provides access to lower reaction temperatures. This new system enables the t...

We present a density-functional theory study addressing the on-surface adsorption of oxygen at the Pd(11N) (N = 3, 5, 7) vicinal surfaces, which exhibit (111) steps and (100) terraces of increasing width. We find the binding to be predominantly governed by the local coordination at the adsorption site. This leads to very similar bonding properties at the threefold step sites of all three vicina...

Ca release by D-myo-inositol 1,4,5-trisphosphate receptors (IP3Rs) is widely considered to require the vicinal 4,5-bisphosphate motif of IP3, with P-5 and P-4 engaging the a and b domains of the binding site; using synthesis and mutagenesis we show that the adenine of synthetic glyconucleotides, through an interaction with Arg504, can replace the interaction of either P-1 or P-5 with the a-doma...

The magnetoresistance sMRd studies of magnetite thin films deposited on vicinal MgO substrates show an enhanced MR along the miscut direction as compared to the direction perpendicular to it. The MR anisotropy increases with the decrease in temperature and peaks at the Verwey transition. The increase in magnetoresistance and anisotropy behavior is attributed to the formation of a greater number...

We have studied changes in surface morphology of vicinal Si(111) surfaces with a miscut of 1.3° in the [2:11] direction after Al deposition at elevated temperatures. The clean surface phase separates into a (111)-oriented phase and a stepped phase. Submonolayer Al deposition at 650°C, the normal preparation temperature of the Al/Si(111)-(E3×E3)R30° structure, only induces minor changes in the s...

Dramatic changes in the surface morphology have been observed during the oxidation of stepped NiAl(16,14,1) by LEED and STM. The initial sequence of identical (110) terraces is lifted in favor of large, triangular planes, whose mean size is determined by the mismatch-induced stress that accumulates in the thin alumina film. The asymmetry of the original step direction on NiAl(16,14,1) with resp...

Thiazolium carbene-catalyzed reactions of 1,2-diketones and 1,2,3-triketones with enones and ynones have been investigated. The diketones gave α,β-double acylation products via unique Breslow intermediates isolable as acid salts, whereas the triketones formed stable adducts with the NHC instead of the coupling products.

Halogen exchange reactions between hexacoordinate tin dihalides (LnCH2)2SnX2 and (LnCH2)2SnY2 (LnCH2 = C,O-chelate n-membered lactamomethyl ligand, n 5–7, X, Y Cl, Br, I) produce mixed (LnCH2)2SnXY. Along with the signals of original complexes, NMR 119Sn spectra solutions containing two different homodihalides show third signal a median chemical shift. The results monitoring studies, conductivi...