Soft Chemical Processing of Mety1-Nitroanilinium Dihydrogenmonophosphate Complex

Abstract

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.