Accession Number : ADA264702


Title :   Conjugated Substituted Ionic Polyacetylenes


Descriptive Note : End-of-year rept.


Corporate Author : MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY


Personal Author(s) : Blumstein, Alexandre


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264702.pdf


Report Date : 05 May 1993


Pagination or Media Count : 67


Abstract : A new method for polymerization of the acetylenic bond in 2-ethynyl- pyridine and its trimethylsilyl derivative is described. The acetylenic triple bond is activated by quaternization of the pyridine nitrogen by methyltrifluoromethane-sulfonate (triflate). The resulting N- methylethynylpyzidinium triflate salts polymerize readily to the corresponding poly(N-methylethynylpyridinium acetylene)triflates when treated with a nucleophilic initiator such as pyridine, or with a free radical initiator (AIBN) . The product polymers are substituted ionic polyacetylenes of low DP with extensive backbone conjugation. Spectral data indicate that the conjugation in these systems is, by far, the highest observed for substituted polyacetylenes.


Descriptors :   *IONS , *POLYMERS , *ACETYLENES , POLYMERIZATION , NITROGEN , CHEMICAL BONDS , FREE RADICALS , PYRIDINES , EXPLOSIVES INITIATORS


Subject Categories : Organic Chemistry
      Physical Chemistry
      Polymer Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE