The Mn₂O₃ nanoparticles have been prepared using solid state thermal decomposition of MnL¹ and MnL², L¹=N,N'-bis(2-hydroxy-4-methoxybenzophenone)-1,3-propanediamine and L²=N,N'-bis(2-hydroxy-4-methoxybenzophenone)-1,2-cyclohexanediamine, at 500°C for 3 h and characterized by the Fourier transform infrared spectroscopy, X-ray powder diffraction and scanning electron microscopy. The Fourier transform infrared spectroscopy and X-ray powder diffraction confirm that the formed product at 500°C is Mn₂O₃. The MnL¹ and MnL² complexes were prepared from the one-pot reaction of MnCl₂·H₂O, diamine and 2-hydroxy-4-methoxybenzophenone and characterized by elemental analyses, the Fourier transform infrared spectroscopy and thermogravimetry.
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