Photo-induced cis-to-trans isomerization monosubstituted polyacetylenes bearing a thiophene ring prepared with a Rh complex catalyst

摘要

Previously, we have demonstrated that monosubstituted acetylenes such as phenylacetylene derivatives can be stereoregularly polymerized using a Rh complex catalyst, [Rh(norbornadiene)Cl]_2 to selectively afford the corresponding polyacetylene polymers bearing a cis-transoid structure in high yields under quite mild conditions. We also reported that triethylamine (TEA) or alcohol solvent works as the cocatalyst in the polymerization.