Polyquinoline derivatives

A related field involves the formation of anthrazoline, polyanthrazo-line, and polyquinoline derivatives using diketones and di-o-aminoaryl-carbonyl compounds. Vast varieties of pyridines, naphthyridines, and phenanthrolines have also been prepared similarly. 

Synthesis and Properties. Polyquinolines are formed by the step-growth polymerization of o-aminophenyl (aryl) ketone monomers and ketone monomers with alpha hydrogens (mosdy acetophenone derivatives). Both AA—BB and AB-type polyquinolines are known as well as a number of copolymers. Polyquinolines have often been prepared by the Friedlander reaction (88), which involves either an acid- or a base-catalyzed condensation of an (9-amino aromatic aldehyde or ketone with a ketomethylene compound, producing quinoline. Surveys of monomers and their syntheses and properties have beenpubhshed (89—91). 

Agrawal and Jenekhe [1102] reported the electrochemistry and UV-vis spectroscopy of a series of conjugated polyquinolines and polyanthrazolines with systematically varied substituents. The good agreement between the value of the bandgap energy as derived from UV-vis spectroscopy and as derived from electrochemical data (electrode potential of polymer reduction and oxidation) is noteworthy. Despite the fact that such a correlation is logical, experimental support is scant. 

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