Synthesis, Crystal Structures, and Spectroscopic Characterization of Bis-aldehyde Monomers and Their Electrically Conductive Pristine Polyazomethines.

ABSTRACT: Bis-aldehyde monomers 4-(4'-formyl-phenoxy)benzaldehyde (3a), 3-methoxy-4-(4'-formyl-phenoxy)benzaldehyde (3b), and 3-ethoxy-4-(4'-formyl-phenoxy)benzaldehyde (3c) were synthesized by etherification of 4-fluorobenzaldehyde (1) with 4-hydroxybenzaldehyde (2a), 3-methoxy-4-hydroxybenzaldehyde (2b), and 3-ethoxy-4-hydroxybenzaldehyde (2c), respectively. Each monomer was polymerized with p-phenylenediamine and 4,4'-diaminodiphenyl ether to yield six poly(azomethine)s. Single crystal X-ray diffraction structures of 3b and 3c were determined. The structural characterization of the monomers and poly(azomethine)s was performed by FT-IR and NMR spectroscopic techniques and elemental analysis. Physicochemical properties of polymers were investigated by powder X-ray diffraction, thermogravimetric ana

SUBMITTER: Hafeez A 

PROVIDER: S-EPMC6780126 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature