Joel M. Batson and Timothy M. Swager
Conjugated -olyparaphenylenes and similar polyarylenes were synthesized
from alkyne containing polymers and either norbornadiene and
dimethylacetylene dicarboxylate with Wilkinson's catalyst, Rh(PPh3)3Cl
to make phenyl containing polymers, or with nonanenitrile and catalystic
system consisting of cobalt(II) chloride, zinc, and
1,2-bis(diphenylphosphino)ethane to make pyridine containing polymers,
both in a [2+2+2] fashion.
The alkyne containing polymers were
synthesized by sonagashira polymerization of f 1,6-heptadiyne and
1,4-bis(hexadecyloxy)-2,5-diiodobenzene, as seen in figure below. Their
properties were characterized through IR, NMR, UV-vis, and GPC.