Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 130, Issue 42, Pages 13956-13960Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja804053a
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We present a systematic theoretical study on the mechanism of half-metallicity and ferromagnetism for one-dimensional (1-D) sandwich molecular wires (SMWs) constructed with altering cyclopentadienyl (Cp) and first-row transition metal (Mt). It is unveiled for the first time that, in (MtCp)infinity, one valence electron would transfer from the Mt to the Cp ring, forming Cp- and Mt(+) altering structures. This electron transfer not only makes them more stable than the benzene analogues (MtBz)infinity but also leads to completely different half-metallic and ferromagnetic mechanisms. We analyze such unusual half-metallicity and ferromagnetic behaviors and explain each SMW magnetic moment quantitatively. Finally, we indicate that a Peierls transition does not occur in these 1-D SMWs.
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