Journal of The Society of Photographic Science and Technology of Japan

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The ionization energies of 2-(4'-Octylphenyl)-6-dodecyloxynaphthalene (8-PNP-O12) layers in crystalline, Smectic B, Smectic A, and isotropic liquid phases were measured by means of photoemission yield spectroscopy in air (PYSA), and found to be 5.63, 5.72, 5.72, and 5.97 eV, respectively. The ionization energy of the layer decreased with increasing its dielectric constant, being in accord with the idea that the ionization energy of a molecule in a layer is smaller than that of a molecule in vacuum by the polarization energy for a positively charged portion in a molecule left in a layer when it is ionized. It is analyzed that the ionization energies of 8-PNP-O12 molecules in the layers with crystalline, SmB, and SmA phases are smaller by ~0.2 eV than those of the molecules in the corresponding layers with random orientation. The electronic structure of the interface between Pt electrode and 8-PNP-O12 was formed on the basis of the result obtained in this study.

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Photopolymer and adhesive using the reactivity of glycidylmethacrylate (GMA) are developed. On the other hand, recently, much attention has been paid to non-solvent or in-water reaction from the perspective of environmental protection. In the present study, as a model reaction for functionalization of water-soluble polymers, the reactivity of an epoxy compound, GMA with water-soluble tertiary amines in water. The reaction of an epoxy compounds with water-soluble tertiary amines having a vinyl group were carried out in water and the reaction products were analyzed using FT-IR and NMR spectroscopy. The reactions gave β-hydroxytetraalkylammonium hydroxides quantitatively in 2 hours. These findings are useful for functionalization of water-soluble polymers having a tertiary amine group. Functionalization of acryl amide oligomers found out that it was more useful as photopolymer than as the photo-curing characteristic.

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