A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability
A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability
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一种氧化还原活性桥配体，可促进自旋离域、高自旋配合物和磁性多重可切换性
DOI：
10.1002/ange.201803842
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发表时间：
2018
影响因子：
--
通讯作者：
Ma X
中科院分区：
文献类型：
--
作者：
Ma X
利用具有氧化还原活性和强络合性的tphz桥连配体组装了一个双核Co Ⅱ配合物[Co2（tphz）（tpy）2]n+（n=4，3或2; tphz：tetrapidphenazine; tpy：terpyridine）.这种复合物的磁性可以从原始化合物（n=4）的T1/2为470 K的自旋交叉调节到当还原一次（n=3）时具有ST=5/2自旋基态的单分子磁体，最后当还原两次（n=2）时为抗磁性物质。 两个连续的可逆还原伴随着复合物内自旋离域的增加，即使在室温下也促进了显着的大磁交换耦合和高自旋物种。
A dinuclear CoIIcomplex, [Co2(tphz)(tpy)2]n+(n=4, 3 or 2; tphz: tetrapyridophenazine; tpy: terpyridine), has been assembled using the redox‐active and strongly complexing tphz bridging ligand. The magnetic properties of this complex can be tuned from spin‐crossover withT1/2≈470 K for the pristine compound (n=4) to single‐molecule magnet with an ST=5/2 spin ground state when once reduced (n=3) to finally a diamagnetic species when twice reduced (n=2). The two successive and reversible reductions are concomitant with an increase of the spin delocalization within the complex, promoting remarkably large magnetic exchange couplings and high‐spin species even at room temperature.