Synthysis, Characterization and Conformation of Some New Macromolecules Containing Nitrone Moieties

Macromolecules containing Nitrone moieties were prepared by oxidation of imines formed by the reaction of terephthaldehyde with diamine compounds using a mixture of hydrogen peroxide and glacial acetic acid. The Nitrone compounds were characterized by CHN analysis, Infra-red and mass spectrometry. Geometrical optimization and calculation of  heat of formation for these compounds confirm that the structure of these compounds is of the E form. Keywords : Macromolecules, Nitrones, Conformatio

Synthesis, Mesomorphic and Molar Conductivity Studies of some Macrocyclic Phthalocyanine Palladium (II)

Two series of Macrocyclic Phthalocyanine Palladium(II) namely 4,4,4,4-RnPcPd and 3,3,3,3-RnPcPd were prepared and characterized. The mesomorphic investigation by hot stage polarizing microscope for these series was carried out. This investigation revealed that the 4,4,4,4-RnPcPd series exhibited columner mesophases while the second series 3,3,3,3-RnPcPd did not show any liquid crystalline properties.The molar conductivity measurments carried out in dimethyl sulfoxide and N,N-dimethyl formamide solvents for all prepared compounds at room temperature indicate that these compounds behave as weak electrolytes . Keywords: Macrocyclic compounds, Macrocyclic complexes, Liquid Crystals, Conductivity

Antioxidant Activity of some Dibenzylidine Diamine-18-Crown-6 Materials

ABSTRACT In the present study,Dibenzylidine Diamine-18-Crown-6 materials have been synthesised by the condensation of Diamine-18-Crown-6 with subsituted benzaldhyde and characterized by Elemental Analysis, Infra red and Proton Magnetic Resonance Spectroscopy.All the synthesized materials were screend for their antioxidant behaviour using standared DPPH free radical as hydrogen acceptor