Synthesis and properties of TSF-based spin-polarized donor
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- 作者：Hideji Komatsu ; Ryoji Mogi ; Michio M. Matsushita ; Tadashi Miyagi ; Yuzo Kawada ; Tadashi Sugawara
- 关键词：Spin-polarized donor ; Coexisting system of magnetism and conductivity ; Tetraselenafulvalene ; Nitronyl nitroxide ; Negative magnetoresistance
- 刊名：Polyhedron
- 出版年：2009
- 出版时间：22 June 2009
- 年：2009
- 卷：28
- 期：9-10
- 页码：1996-2000
- 全文大小：488 K
文摘
A novel organic donor radical, TSBN, which is a benzotetraselenafulvalene derivative carrying a nitronyl nitroxide group in a cross-conjugated manner was prepared. X-ray crystallographic analysis revealed that TSBN forms a sheet-like network within the ac plane through intermolecular chalcogen contacts. Its spin-polarized structure was confirmed by cyclic voltammogram, ESR spectra of singly oxidized species and DFT calculation. The neutral crystal of TSBN showed nonlinear I–V characteristics at 2 K and exhibited negative magnetoresistance (−5 % at 2 K under 5 T).