メチルニトロアニリン-リン酸複合体のソフトケミカルプロセッシング (セラミックスのケミカルプロセッシング<特集>)

概要

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C2H9N2O2+-H2PO4-complex was prepared by adding of 2-metyl-4-nitoroanilinium[MNA(2-4)] and 4-metyl-2-nitoroanilinium[MNA(4-2)] into the 85% H3PO4 solution at 60°C. The large platelet crystals were obtained after maturing for several days at room temperature. The XRD pattern of the newly obtained crystal of MNA(4-2) +-H2PO4-was indexed as orthorhombic unit cell with a=33.14A, b=8.307A, c=8.056A, respectively. Also, the complexes were identified as the layered structure in which the MNA cations were sandwitched between H2PO4- sheets via hydrogen bonds. The results of thermal analysis demonstrated that the thermal stability of complexes was closely related to the basic activities of organic moiety. According to the UV-Vis spectra, the maximum position of absorbance shifted to higher wavenumber, because a change in the molar polarity was occurred by the formation of the complex. The dielectric constants at MHz was almost independent of the temperature in ranging of 15-17. In particular, the conformational discrepancy of MNA(2-4) and MNA(4-2) reflected on the dielectric properties and the apparent distance of hydrogen bonds bridging between MNA cation and H2PO4-. A novel preppration procedure for the material design with dielectric property is suggested.
社団法人粉体粉末冶金協会の論文