ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Methyl-, ethyl- and n-butyl ferrocene (I–III) form dark colored charge transfer complexes with TCNE both in solution and by trituration of the solid donor and acceptor. Their Mössbauer spectra suggest only minor reduction of the TCNE acceptor. On the other hand, 1,1′-dimethylferrocene (IV) forms a ferricenium complex with TCNE of 1∶2 stoichiometry whose structure is likely similar to that determined for [IV][TCNQ]2. The new 1∶2 ferricenium-TCNE phase undergoes a novel, spontaneous, irreversible solid-state transformation back to a mixture of a low spin FeII ferrocene species and a high spin FeII complex over a period of weeks at ambient temperature. In preliminary studies, irradiation of samples of these materials with white light (including near infrared wavelengths) suggests significant photochemical activity of the type $$D^0 A^0 \xrightarrow{{hv}}D^ + A^ - $$ and vice versa in the solid state. This is observable in Mössbauer spectra at 77 K. In the absence of irradiation with tungsten-halogen white light sources, however, the photo product is not permanently trapped at this temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02072915
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