Generally, metal nanoparticles are prepared by a variety of chemical methods that are not environmentally friendly. We report on the use of aqueous solutions of ionic polymers containing arsonic acid groups for the green synthesis of Au and Ag nanoparticles of intriguing shapes at room temperature without using additional reducing reagent. Our results indicate that these ionic polymers are not only capable of reducing metal ions but also can protect the nanoparticles in the colloidal solutions. In general, the process of metal ions reduction using these ionic polymers is very slow, but the ability of the polymers to protect the Au and Ag nanoparticles permits us to obtain colloidal solutions that are stable for several months. This method would be very much useful for the preparation of other metal nanoparticles.

No abstract

Synthesis of ortho‐ and para‐acryloylaminophenylarsonic acids (o‐AAPHA and p‐AAPHA) monomers and their homopolymers, useful as ion‐exchange materials, are reported. Both the monomers and homopolymers are synthesized with >90% yield. The structures of the new compounds are determined by NMR and FTIR spectroscopy. Molecular weights of the polymers are determined from light scattering measurements and found to be Mw = 38,759 g/mol for o‐AAPHA polymer and Mw = 31,347 g/mol for p‐AAPHA polymer. Good thermal stability of the new compounds derived from their intra‐ or intermolecular hydrogen bondings suggests their applications as proton‐exchange membrane at high temperatures. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 1627–1634, 2006

Abstract-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 oand 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.