Crystal structure, thermal behavior and spectroscopic studies of a new organic hydrogen arsenate

Abstract

The present paper undertakes the study of a title organic-inorganic hybrid material 2-amino-3-benzyloxy pyridinium dihydrogenmonoarsenate, [C₁₂H₁₃N₂O]H₂AsO₄, which has been synthesized by slow evaporation at room temperature using 2-amino-3-benzyloxypyridine as the structure-directing agent. The structure was determined by single-crystal X-ray diffraction at 296 K. This compound is crystallized in the noncentrosymmetric orthorhombic space group P2₁2₁2₁ with the lattice parameters a = 4.89 (7), b = 10.41 (1), c = 26.79 (3) Ã…, V = 1364.3 (3) Ã…³, and Z = 4. The crystal structure has been determined and refined to R₁ = 0.0363 and wR₂ = 0.1246 using 5438 independent reflections. The atomic arrangement can be described by infinite anionic chains running parallel to the [100] direction. The organic entities are located between these chains. H-bonds connecting the different species play an important role in the one-dimensional network cohesion. This compound is also characterized by solid-state ¹³C MAS NMR, IR, Raman spectroscopy and TG-ATD thermal analysis. Moreover, protonic conduction of this compound determined by impedance has been studied in the temperature range 299 - 403 K.