Peculiarity in the electronic structure of Cu(II) complex ferromagnetically coupled with bisimino nitroxides
Peculiarity in the electronic structure of Cu(II) complex ferromagnetically coupled with bisimino nitroxides
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DOI：
10.1021/jp802810s
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发表时间：
2008-09-18
影响因子：
2.9
通讯作者：
Nihei, Masayuki
中科院分区：
文献类型：
--
作者：
Ikoma, Tadaaki;Oshio, Hiroki;Nihei, Masayuki
本文用电子自旋共振（ESR）技术研究了亚氨基硝酰基铜（Ⅱ）配合物的电子结构（Cu-bisimpy），它具有正方形平面结构和具有极强铁磁交换相互作用的基态四重态，以及它的相关化合物（bismpy = 2，6-双（1 '-氧基-4'，4 '，5'，5 '-四甲基-4'，5 '-二氢-1' H-咪唑-2 '-基）吡啶）。与双自由基配体（bisimpy）、锌（II）双自由基配合物（Zn-bisimpy）和铜（II）三联吡啶配合物（Cu-tpy）（tpy = 2，2 '; 6'，2“-terpyridine）相比，Cu-bisimpy具有独特的磁性轨道。多频ESR谱提供了一组可靠的Cu-bisimpy的磁性参数，它具有小的g各向异性（g（x）= 2.02，g（y）= 2.01，g（z）= 2.08）和与Cu的小的超精细耦合（竖线A（x）竖线= 42.0MHz，竖线A（y）竖线
By means of the electron spin resonance (ESR) technique, we have investigated the electronic structures of the tridentate imino nitroxyl diradical complex with copper(II) (Cu-bisimpy), which has a square planar structure and a ground quartet state with an extremely strong ferromagnetic exchange interaction, and its related compounds (bisimpy = 2,6-bis(1'-oxyl-4',4',5',5'-tetramethyl-4',5'-dihydro-1'H-imidazol-2'-yl)pyridine). It was clarified that Cu-bisimpy had unique magnetic orbitals, compared with the biradical ligand (bisimpy), a zinc(II) biradical complex (Zn-bisimpy) and a copper(II) terpyridine complex (Cu-tpy) (tpy = 2,2';6',2 ''-terpyridine). Multifrequency ESR spectroscopy provided a reliable set of magnetic parameters of Cu-bisimpy, which has a small g anisotropy (g(x) = 2.02, g(y) = 2.01, g(z) = 2.08) and small hyperfine coupling with Cu (vertical bar A(x)vertical bar = 42.0 MHz, vertical bar A(y)vertical bar