Adsorption of 11-Mercaptoundecanoic Acid on Ni(111) and Its Interaction with Probe Molecules

Abstract

The gas-phase adsorption of 11-mercaptoundecanoic acid (HOOC(CH2)10SH) on Ni(111) in ultrahigh vacuum was studied using angle-dependent X-ray photoelectron spectroscopy (ADXPS) and temperature-programmed desorption (TPD). We present evidence which shows that 11-mercaptoundecanoic acid is adsorbed to Ni(111) via the sulfur atom with the carboxylic acid group disposed away from the surface. The monolayer thickness of this molecule, 10.4 ± 1.7 Å, estimated by photoelectron attenuation in ADXPS, was comparable to ellipsometric measurements of related n-alkanethiols on Au(111). The interaction of polar (CH3OH) and nonpolar (n-C6H14) probe molecules with this acid-terminated surface showed that the former interact more strongly than the latter as studied by TPD. A Redhead analysis was used to analyze the TPD spectra of CH3OH and n-C6H14 desorbing from this thiol-covered, acid-terminated Ni(111) surface. The calculated low-coverage desorption energy for CH3OH desorption from HOOC(CH2)10SH/Ni(111) was 41 kJ mol-1. The calculated low-coverage desorption energy for n-C6H14 desorption from HOOC(CH2)10SH/Ni(111) was 37 kJ mol-1.

Self-assembly of 1,4-phenylene diisocyanide and terephthalic acid on Ni, Cu and Pt

“…and 287.1 eV are assigned to aromatic carbon atoms, carbon atoms adjacent to isocyanide groups, and carbon atoms in surface-bonded and free isocyanide groups. The smallest peak, at 288.5 eV, occurs in the region expected for carbon in carboxylate groups [55]. Hence, this peak, in conjunction with the oxygen peak of Fig.…”

Preparation of Alkanethiolate-Functionalized Core/Shell Fe3O4@Au Nanoparticles and Its Interaction with Several Typical Target Molecules

“…Thiols bound to Au surface as thiolates have S (2p) binding energies of about 162 eV, whereas unbound thiols have binding energies of 164-165 eV. 16,43 None of the alkanethiolates SAMs showed any traces of unbound thiolates. According to their chemical configuration, an 11-MUA molecule contains 11 carbon atoms at different valence states and two oxygen atoms, whereas an 11-DDT molecule contains 12 carbon atoms at the same valence state but contains no oxygen atom.…”

Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

“…The last peak at 289.6 eV corresponds to the carboxylic carbon. [28][29][30][31][32][33][34][35] The analysis of the carbon 1s core level region for a SAM of 11-MUA represents the starting point to characterize the functionalization process with macrocycle 2 28 or with naphthalimide rotaxane. Figure 2, top panel, shows the C 1s core level region for a monolayer functionalized with naphthalimide rotaxane molecules: as can be clearly seen, there are several differences between the spectrum recorded for the SAM alone and for the SAM modified with the rotaxane, confirming that they refer to different situations.…”