Mössbauer Spectroscopy Studies of Polyacetylene Doped With Selected Metal Halides

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Abstract
Highly conducting derivatives of polyacetylene formed in the redox reactions with FeCl3 FeBr3 and SnCl4 have been studied by Mossbauer spectroscopy. From the temperature dependence of the recoil-free fraction, the Mossbauer lattice temperatures 89K, of the following binary compounds (CH(FeCl4)y)x, (CH(FeBr4)y)x and (CH(SnCl5)y)x, were calculated as 89K, 120K and 95K respectively. It has been also shown that it is possible to synthesize a ternary compound (CH(SnCl5)y (FeCl4))x through consecutive reactions of (CH)X with SnCl4 and FeCl3. 119Sn and 57Fe Mossbauer parameters of the ternary compound do not change significantly as compared to the ones of the corresponding binary compounds (CH(SnCl5)y)x and (CH(FeCl4)y)x indicating that the inserted species of different chemical nature do not influence mutually their coordination spheres.