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Publication
Organometallics
Paper
Ferrocenylenegermane Polymers and Copolymers
Abstract
Ferrocenylenegermane polymers and copolymers (1) have been prepared, in situ, by thermal treatment of the product from the reaction between dilithioferrocene and the corresponding R2GeCl2, R = methyl (1a), ethyl (1b), n-butyl (1c), or their mixtures, Me2GeCl2+ n-Bu2-GeCl2(1d) and Et2GeCl2+ n-Bu2GeCl2 (1e). Thin films of the polymers can exhibit both semicrystalline or amorphous morphology dependent upon the nature of the alkyl group and/or mode of casting. When cast from THF, 1c was observed as an amorphous material; however, after time a crystalline form was obtained. Films of mixed polymer systems, 1b + 1c, cast from THF immediately resulted in crystalline forms for both polymers, i.e., a seeding of 1c by 1b occurred. The diethyl/di-n-butyl copolymer was amorphous and elastomeric as was the dimethyl/di-n-butyl analog. Cyclic voltammetry indicated the presence of two reversible redox couples in solution with potentials slightly higher than the Si analogs. The copolymers also exhibited distinctive electrochemistry and not a combination of the two individual components. © 1995, American Chemical Society. All rights reserved.