Alexander Shaplov - “One - Pot” Synthesis of Aromatic Poly-(1,3,4-Oxadiazole)s in novel solvents - Ionic Liquids

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  Publication Details (including relevant citation   information):

  E.I. Lozinskaya, A.S.   Shaplov, M.V. Kotseruba, L.I. Komarova, K.A. Lyssenko,   M.Yu. Antipin, D.G. Golovanov, Ya.S. Vygodskii. J.   Polym. Sci. Part A: Polym. Chem.,   2006, v.44, no. 1, P.380-394.


  The new   convenient method for the synthesis of high molecular weight   aromatic poly-(1,3,4-oxadiazole)s (PODs) has been proposed. These   polymers were prepared by “one-pot” procedure from dicarboxylic   acid and hydrazine’s salt (sulfate, phosphate) or dicarboxylic   acid dihydrazides. The mixture of ionic liquid and triphenyl   phosphite was used both as a a solvent and condensing agent. The   polycyclization occurred at sufficiently low temperature equal to   210oC for 2 - 5 hours and   resulted in obtaining film-forming PODs having inherent   viscosities up to 0.9 dl/g and good thermal stability.

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