Neutral dipole-dipole dimers: A new field in science

作者：Kosower Edward M^*; Borz Galina

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2018, 192: 291-296.

DOI：10.1016/j.saa.2017.11.026

• Polyethylene IR substrate
• Neutral dipole dimer
• Low polarity water
• Palmitic acid dimer
• N-methylacetamide dimer
• Water polyoligomers

Dimer formation with dipole neutralization produces species such as low polarity water (LPW) compatible with hydrophobic surfaces (Phys. Chem. Chem. Phys. 2015,17, 24895-24900) Dimerization and dipole neutralization occurs for N-methylacetamide on polyethylene, a behavior drastically different from its contortions in acetonitrile on AgBr:AgCl planar crystals (AgX) (ChemPhysChem 2014, 15, 3598-3607).
The weak infrared absorption of the amide dimer on polyethylene is shown experimentally. Dimerization of palmitic acid is shown along with some of the many ramifications for intracellular systems. Polyoligomers of water are present on polyethylene surfaces. Some high resolution spectra of three of the polyoligomers of water are shown along with a mechanistic scheme for polyoligomer formation and dissolution. The structures of some of the oligomers are known from spectroscopic studies of water on AgX.

• 出版日期2018-3-5