Four monomers containing azomethine-type spacers and 1-naphthyl groups at the extremities were synthesized by a coupling reaction between 1-naphthaldehyde with four different diamines. Full conjugated polyazomethines were obtained by oxidative polymerization of the monomers using anhydrous FeCl3. Both monomers and polymers were investigated by IR, UV-Vis and 1H NMR methods.
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Grigoraş et al. (2001) studied this question.