Design and Characterizations of Essential Metal (II)-Amino Acid : L-Arginine & L- Alanine containing Polyphosphonitrile Derivatives

Over the past decade, inorganic polymers, particularly polyphosphazenes, have garnered significant attention in materials science due to their unique structural versatility and tuneable properties. Polyorganophosphazenes, with the general formula [NPR2], offer a broad range of physical and chemical characteristics, largely determined by the nature of their side groups (R), which can include Amino, Alkoxy, Aryloxy, Alkyl, or Aryl functionalities. In this study, we report the synthesis and characterization of a novel class of inorganic polymeric derivatives Metal (II)-amino acid-substituted polyphosphonitriles. These derivatives were prepared using amino acids (L-arginine and L-alanine) and side groups containing sodium, ethoxy, and phenoxy moieties. The central Metal(II) ions—Zn(II), Cu(II), Mg(II), Ca(II), and Fe(II)—are essential metals with known biological and catalytic relevance. The successful incorporation of these components was achieved through controlled polymerization and substitution reactions, resulting in structurally diverse and functionally promising materials. The synthesized polymers were characterized by their physical properties, including colour, conductivity, pH, melting point, dipole moment, and dielectric behaviour. Spectroscopic techniques such as Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD) were employed to confirm the structural features of the new materials. This study introduces a promising new class of inorganic-organic hybrid polymers with potential applications in areas such as Biomedicine, Environmental Remediation, Agricultural area and Advanced Material Engineering.