Polymerization of 4-(ferrocenylethynyl)phenylacetylene with transition metal catalysts

摘要

A new conjugated polymer carrying organometallic pendant groups, poly4-(ferrocenylethynyl)phenylacetylene, has been prepared. Rh(nbd)(OCH_3)_2 as a catalyst (nbd = norbornadiene) provides a mixture of an insoluble polymer (yield 71)free of C (ident to) CH groups and soluble oligomers (yield 22, MW ca. 1100). WOCl_4/2Me_4Sn as a catalyst provides almost exclusively a polymer (yield 60, (M-bar)_w=32 (centre dot) 10~3) containing a small amount of C (ident to) CH groups that is soluble in aromatic and low-polarity solvents. Its solubility, however, decreases upon storage in the solid state, probably due to a subsequent crosslinking. The ~(13)C NMR, IR, UV-vis and Raman spectra of the monomer and polymers are reported.