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

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ID: 52048
2019
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Abstract
Bis-aldehyde monomers 4-(4'-formyl-phenoxy)benzaldehyde (), 3-methoxy-4-(4'-formyl-phenoxy)benzaldehyde (), and 3-ethoxy-4-(4'-formyl-phenoxy)benzaldehyde () were synthesized by etherification of 4-fluorobenzaldehyde () with 4-hydroxybenzaldehyde (), 3-methoxy-4-hydroxybenzaldehyde (), and 3-ethoxy-4-hydroxybenzaldehyde (), respectively. Each monomer was polymerized with -phenylenediamine and 4,4'-diaminodiphenyl ether to yield six poly(azomethine)s. Single crystal X-ray diffraction structures of and 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 analysis (TGA), viscometry, UV-vis, spectroscopy and photoluminescence. These polymers were subjected to electrical conductivity measurements by the four-probe method, and their conductivities were found to be in the range 4.0 × 10 to 6.4 × 10 Scm, which was significantly higher than the values reported so far.
Reference Key
hafeez2019synthesispolymers Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Hafeez, Abdul;Akhter, Zareen;Gallagher, John F;Khan, Nawazish Ali;Gul, Asghari;Shah, Faiz Ullah;
Journal Polymers
Year 2019
DOI
E1498
URL
Keywords
conductivity polyazomethines bis-aldehydes poly(schiff base)s single crystals spectroscopic characterization

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