Synthesis and physical properties of transition metal complexes of poly(9-n-hexylfluorene) and poly(l-n-hexylindene)

Summary form only given. Polyfluorene and polyindene are /spl pi/-conjugated organic polymers with both /spl eta/sub 5// - or /spl eta/sub 6// /spl pi/-coordination abilities to transition metal centers. It is interesting to understand how the electrical, optical and magnetic properties of the /spl pi/-conjugated systems in such polymers can be perturbed by the electronic interaction with d-electrons (orbitals) of transition metals. We have previously reported the electrochemical synthesis of poly(9-n-hexylfluorene) (PHF) and poly(l-n-hexylindene) (PHI), which are soluble in less polar organic solvents such as benzene or dichloromethane and thus utilizable as reagents in homogeneous reactions. In this paper we present a study on the synthesis and physical properties of transition metal complexes of PHF and PHI. Reaction of PHF with Mn(CO)/sub 5/Br in the presence of AICl/sub 3/ gives PHF-Mn(CO)/sub 3/ where PHF behaves as /spl eta/sub 5//-ligands. PHF-Mn(CO)/sub 3/ shows a shift of absorption edge in the visible spectrum to the longer wavelength and an increase in electric conductivity compared to free PHF. Synthesis and physical properties of other polymer complexes, PHF-CO(C/sub 5/Me/sub 5/)/sup +/ and PHI-Rh(C/sub 5/Me/sub 5/)/sup +/ will be also reported.