Pal Sushanta K, Itkis Mikhail E, Tham Fook S, Reed Robert W, Oakley Richard T, Haddon Robert C
Department of Chemistry, University of California, Riverside, California 92521-0403, USA.
J Am Chem Soc. 2008 Mar 26;130(12):3942-51. doi: 10.1021/ja077771o. Epub 2008 Feb 29.
We report the preparation, crystallization, and solid-state characterization of the first member of a new family of tris(1,9-disubstituted phenalenyl)silicon neutral radicals. In the solid state, the radical packs as weak partial pi-dimers with intermolecular carbon...carbon contacts that fall at the van der Waals atomic separation. Magnetic susceptibility measurements indicate approximately 0.7 Curie spins per molecule from room temperature down to 50 K, below which antiferromagnetic coupling becomes apparent; the compound has a room-temperature single-crystal conductivity of sigmaRT = 2.4 x 10(-6) S cm(-1).
我们报道了一类新型三（1,9-二取代菲咯啉基）硅中性自由基家族首个成员的制备、结晶及固态表征。在固态中，该自由基以弱的部分π-二聚体形式堆积，分子间碳……碳接触处于范德华原子间距。磁化率测量表明，从室温到50 K，每个分子约有0.7居里自旋，低于此温度反铁磁耦合变得明显；该化合物在室温下的单晶电导率为σRT = 2.4×10⁻⁶ S cm⁻¹。
