Growth and characterization of 4‐Aminopyridinium‐4‐nitro phenolate single crystals

Abstract

Key words growth from solutions, optical properties, X-ray diffraction. PACS 81.10. Dn, 95.85.Nv Organic optical material 4-Aminopyridinium-4-nitro phenolate (4AP4NP) has been synthesized, and single crystals of size 20 x 14 x 6 mm 3 have been grown from acetone solvent at room temperature by solvent evaporation technique. The grown crystals have been characterized by X-ray diffraction to determine the cell parameters, and by FT-IR technique to confirm the formation of the expected compound. The crystal belongs to monoclinic crystal system with space group P2 1 /a.The structural perfection of the grown crystals has been analyzed by high-resolution X-ray diffraction (HRXRD) rocking curve measurements. The thermal stability of the compound has been determined by TG-DTA curves. The transmittance of 4AP4NP has been used to determine the refractive index n; the extinction coefficient K and both the real ε r and imaginary ε i components of the dielectric constant as functions of photon energy. The optical band gap of 4AP4NP is 2.4 eV. The dielectric and mechanical behavior of the specimen was also studied.