Abstract
Crystals structure of p-Nitroanilinium sulfate, (C6H7N2O2+, HSO4−) grown from aqueous solution were characterized by single crystal X-ray diffraction at 298K. This compound crystallizes in P212121 space group of orthorhombic system. The structure is built by chains formed by (NH3C6H4NO2+) organic cations between which are situated the sulfate mineral anions (HSO4−). The thermal analyses were realized by differential scanning calorimetry (DSC) technique which indicated that the p-Nitroanilinium sulfate present a reversible phase transition at Tc=338(2)K. The SHG measurements were realized at room temperature as well as with temperature depending. During heating and cooling processes the second harmonic signals show a reversible phase transition at 57°C. These results are in good agreement with the results obtained from DSC measurements.
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