Poly(azomethine)s Derived front Ether Based Aromatic Dialdehydes Synthesis and Physicochentical Studies

Abstract

Aromatic poly(azomethine)s are high performace materials being used in large area displays, resistive switching, and memory chips etc. Structural modification of reacting monomers leads to drastic changes in the physicochemical properties of macromolecules. Therefore, in the present study a series of nine ether-based wholly aromatic dialdehydes with different substituents (-OCH3, -OC2Hs, -CH3, -CF3) have been synthesized via etherification reaction between 4-fluorobenzenecarboxaldehyde and different phenols (i.e. di-hydroxyphenols or 4-hydroxybenzenecarboxaldehydes) in inert atmosphere. These bisaldehydes have been polymerized with two diamines (pphenylenediamine, and 4,4'-diaminodiphenyl ether) using p-toluene sulfonic acid catalyst in N,N-dimethylfofmamide. Both the monomers and the polymers were synthesized in the presence of dry nitrogen atmosphere. The structural characterization was done with different spectroscopic techniques. Moreover, different physicochemical properties of synthesized polyazomethines have been studied using various techniques of spectroscopy, viscometry, thermal analysis, and solubility. The polyazon thi es applicability i optoel ctronics/semiconduct rs was checked by photoluminescence and conductivity techniques.