具有四重基态的稳定镍卟啉中氧自由基。
Stable Ni Porphyrin meso-Oxy Radical with a Quartet Ground State.
作者信息
Stähler Cosima, Shimizu Daiki, Yoshida Kota, Furukawa Ko, Herges Rainer, Osuka Atsuhiro
机构信息
Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, Otto-Hahn-Platz 4, Kiel, 24098, Germany.
Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.
出版信息
Chemistry. 2017 May 29;23(30):7217-7220. doi: 10.1002/chem.201701354. Epub 2017 May 2.
10,15,20-Tris(pentafluorophenyl)-substituted Ni -porphyrin meso-oxy radical bearing two coordinating pyridines was synthesized as a stable radical with a quartet ground state (S=3/2). X-ray structural analysis revealed that the Ni porphyrin moiety is fairly planar and the Ni-N bond lengths are considerably longer, indicating the high-spin state of the Ni center. The radical exhibited a quartet ground state, indicating the ferromagnetic interaction between the high-spin Ni center (S=1) and the porphyrin meso-oxy radical (S=1/2).
合成了带有两个配位吡啶的10,15,20-三（五氟苯基）取代的镍卟啉中-氧自由基，其为具有四重基态（S = 3/2）的稳定自由基。X射线结构分析表明，镍卟啉部分相当平面，且Ni-N键长明显更长，表明镍中心处于高自旋态。该自由基表现出四重基态，表明高自旋镍中心（S = 1）与卟啉中-氧自由基（S = 1/2）之间存在铁磁相互作用。
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