Infrared spectroscopy of competitive interactions between liquid crystals, metal salts, and dimethyl methylphosphonate at surfaces

Article Abstract:

Fourier transform polarization modulation infrared reflection-absorption spectroscopy (PM-IRRS) is used to characterize the influence of dimethyl methylphosphonate (DMMP) on the molecular interactions occurring within thin films of nitrile-containing liquid crystals supported on surfaces presenting metal perchlorate salts. The results have concluded that the ordering transitions reflect the relative strengths of coordination interactions occurring between the 4'-pentyl-4-biphenylcarbonitrile (5CB), DMMP, and the metal salts at these interfaces.

Spectra

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Mechanistic study of the anchoring behavior of liquid crystals supported on metal salts and their orientational responses to dimethyl methyphosphonate

Article Abstract:

An investigation of the orientational behavior of films of nematic liquid crystal (LC) 4'-pentyl-4-biphenyl-carbonitrile (5CB) supported on a variety of metal perchlorate salts and their oreintational response to dimethyl methylphosphonate (DMMP) is reported. The results suggest that 5CB supported on perchlorate salts comprised of metal ions with high electron affinities, such as Cu(super 2+), Zn(super 2+), Cd(super 2+), Co(super 2+), La(super 3+), Al(super 3+), and Fe(super 3+), assumes a homeotropic orientation.

Electronic components, not elsewhere classified, Other Electronic Component Manufacturing, Liquid Crystals

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Experimental study of dimethyl methylphosphonate decomposition over anatase TiO2

Article Abstract:

Removal of the air and decomposition of dimethyl methylphosphonate (DMMP) over high surface area anatase TiO2 at ambient temperature were identified quantitatively studied by employing Fourier transform infrared (FTIR) techniques under static conditions. The hydrolysis of adsorbed DMMP led to methanol and methyl methylphosphonate (MMP).

Science & research, Research, Decomposition (Chemistry)

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