Synthesis, Characterization, Antimicrobial Activity and Theoretical Studies of New Polymeric Schiff-base

A novel Schiff-base compound was synthesized by condensation of 4-hydroxybenzaldehyde and 4-aminoazobenzene. The prepared Schiff-base was converted to a polymer by reaction with formaldehyde and resorcinol. The two types of the prepared compounds were characterized with spectral techniques (FT-IR and 1H-NMR). The biological activity as antibacterial and antifungal was tested using the cork well diffusion method against some standard microorganisms, which indicate that these compounds showed good antimicrobial activity. HyperChem-8 program has been used to determine total energy, LUMO-HOMO, bond length and angles.

Synthesis of Polymeric Schiff Base (PSB) Nanostructural Materials via Interfacial Polymerization

Nanostructural materials of polymeric Schiff base (PSB) have been selectively synthesized via interfacial polymerization (IP) by modifying the polymerization process. The effects of synthesizing methods, catalyst, the monomer concentration and the reaction time on the morphology of PSB nanostructural materials are investigated. The samples are characterized by TEM, FT-IR, UV-Vis, XRD, thermal analysis, and electrical conductivity measurement techniques. The results show that the PSB nanostructural materials, such as nanofilms and-rods, can be obtained via IP. Na+ and NH4+ ions act as shape-regulated agents. Na+ ion can control the growth of PSB nuclei along two-dimension to obtain PSB nanofilms and NH4+ is advantage to the growth of PSB nuclei along one-dimension to obtain PSB nanorods. It is also found that the polymer nanocrystals show high thermal stability and the iodine-doped polymer is a semiconductor material.