Adsorbate geometry distinction in arenethiols by ion/surface reactive collisions

Article Abstract:

Ion/surface reactive collisions and charge exchange leading to chemical sputtering are sensitive to chemisorbate structure of aromatic compounds. The differences in adsorption geometry were investigated using self-assembled monolayers of 1,2-, 1,3- and 1,4-benzenedimethanethiol adsorbed in gold and silver thin films as target surfaces. Results suggested that the difference in adsorbate geometry is due to the presence of aromatic C-H and S-H chains and an S-C-H bend from the gold monolayer and the absences of these in the silver monolayer.

Research, Monomolecular films, Adsorption, Aromatic compounds

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Coupling desorption electrospray ionization with ion mobility/mass spectrometry for analysis of protein structure: Evidence for desorption of folded and denatured states

Article Abstract:

A desorption electrospray ionization (DESI) source is coupled to an ion mobility time-of-flight mass spectrometer for the analysis of protein structures. The results have indicated that the DESI experiment is gentler than ESI and under appropriate conditions it is possible to preserve structural information throughout the DESI process.

Cytochrome c, Ionization, Lysozyme, Chemical properties

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A direct comparison of protein structure in the gas and solution phase: the Trp-cage

Article Abstract:

The article presents a direct comparison of the gas and solution-phase structures of the Trp-cage protein, with reference to the similarity in charge location. There seems to be difference in the structures, with an enhancement in hydrogen bonds and exposure of hydrophobic parts in the gas phase.

Observations, Molecular dynamics, Hydrogen bonding, Hydrogen bonds, Atomic properties, Hydrophobic effect, Zwitterions

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