New tetrapropylammonium tetrabromozincate complex [(C3H7)4N]2ZnBr4(II) - synthesis, spectral, thermal characterization and antioxidant activity

ABSTRACT. The importance of the A2BX4 complex (A = bivalent ion, NH4+ and its alkyl radical derivatives; B = bivalent transition metal ion and X = halogen) has increased in recent years due  to fascinating physical properties such as ferro elastic, ferroelectric, and corresponding – unequal phases at low temperatures. In modern technologies the use of transistors, ferromagnetic garnets, sensor systems, softener templates, and ultraviolet light, as well as IR solid-state lasers,          efficient crystalline materials are expected. A slow evaporation approach at room temperature was used to grow the TPAPBr-Zn [(CH3CH2CH2)4N]2ZnBr4(II) challenging kind A2BX4. Elemental analysis, powder diffraction, differential thermal analysis, FT-IR, proton and carbon-13 NMR spectroscopic techniques are used to characterize the synthesized compound.  The presence of chemical groups and methylene radical groups in the compound are confirmed by the FT-IR spectra. The presence of an N-propyl group in the molecule is indicated by the nuclear magnetic resonance spectra. Thermogram of the compound reveals two-stage decomposition showing endo followed by exothermic decomposition resulting zinc oxide as an end product. As synthesised compound shown significant inhibitory activity towards free radical.   KEY WORDS: Synthesis, Elemental analysis, Spectroscopic studies, TG analysis, Antioxidant, Tetrapropylammonium tetrabromozincate(II)   Bull. Chem. Soc. Ethiop. 2023, 37(3), 623-631.                                                              DOI: https://dx.doi.org/10.4314/bcse.v37i3.7