New o- and p-methacryloylaminophenylarsonic monomers. Useful building units for water-soluble polymeric and nonlinear optical materials

New o- and p-methacryloylaminophenylarsonic monomers and their sodium salts were prepared from the condensation reaction of o- and p-aminophenylarsonic acids and methacryloyl chloride for obtaining water-soluble cationic exchange polymeric materials by radical polymerization of such monomers. Noteworthy features were the coordination of some metal ions with the o- and p-methacryloylaminophenylarsonic acid (o- and p-MAPHA) monomers by interchange of the corresponding salts and the good nonlinear optical (NLO) properties displayed by these compounds. The structures of the new monomers were determined by mass spectrometry and IR, 1 H-NMR, and 13 C-NMR spectroscopy.