Abstract Supermagnetic nanocomposite of polyaniline thiacalix [4] arene (Fe 3 O 4@ PANI- AmAzoTCA [4]) was prepared by coprecipitation of aniline-diaminoazo thiacalix [4] arene copolymer (PANI-AmAzoTCA [4]) and in-situ generated Fe 3 O 4 nanoparticles. Structural, morphological and magnetic properties of the nanocomposite was studied by nuclear magnetic resonance (NMR), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Atomic ...