Disorder-to-order transition of 1,4-dimethylnaphthalene: Formation of molecular complex with water and p-xylene on Al2O3 (0001)

Article Abstract:

Water, which has a lower desorption temperature than 1,4-dimethylnaphthalene (DMN), was vacuum deposited first, followed by DMN, in a bilayer experiment. It was observed that when the surface is heated, water percolates through the DMN and forms a molecular H2O-DMN surface complex that desorbs simultaneously and the stochiometric ratio of this complex was determined to be [(DMN).sub.(1.4 plusmn 0.3)].H2O.

Analysis, Water, Fluorescence, Stoichiometry, Chemical properties

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Surface studies of aqueous methanol solutions by vibrational broad bandwidth sum frequency generation spectroscopy

Article Abstract:

Raman, FTIR and vibrational broad bandwidth sum frequency generation (BBSFG) spectroscopy are used to investigate the liquid phase and the air liquid interface of aqueous methanol solutions. The surface studies strongly suggest that methanol is a more efficient hydrogen bonding acceptor when the methanol molecule resides in the interfacial region.

All Other Basic Organic Chemical Manufacturing, Methanol, Usage, Fourier transform infrared spectroscopy, Spectra (Spectroscopy)

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1-methyl naphthalene reorientation at the air-liquid interface upon water saturation studied by vibrational broad bandwidth sum frequency generation spectroscopy

Article Abstract:

The surface structure and the reorientation of the 1-methyl naphthalene (1-MN) molecules upon saturation of the 1-MN liquid with water are investigated by using vibrational broad bandwidth sum frequency generation spectroscopy. 1-MN molecules have the majority of the methyl groups aligned on the air side of the interface.

Molecules

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