We report on the synthesis and characterization of a series of halo-substituted polyanilines into VOPO4 center dot 2H(2)O. Treatment of the corresponding monomers with the highly oxidizing host VOPO4 center dot 2H(2)O resulted in in situ intercalation/polymerization. The resulting intercalated nanocomposites were characterized by powder X-ray diffraction, FTIR spectroscopy and thermogravimetric analysis. (C) 2007 Elsevier B.V. All rights reserved.