Iron(III) complexes of 2-methyl-6-(pyrimidin-2-yl-hydrazonomethyl)-phenol as spin-crossover molecular materials
Iron(III) complexes of 2-methyl-6-(pyrimidin-2-yl-hydrazonomethyl)-phenol as spin-crossover molecular materials
复制标题
2-甲基-6-(嘧啶-2-基-亚肼基甲基)-苯酚铁(III)配合物作为自旋交叉分子材料
DOI：
10.1039/c7dt03233a
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发表时间：
2017
影响因子：
4
通讯作者：
Kou Hui Zhong
中科院分区：
文献类型：
--
作者：
Yuan Juan;Liu Mei Jiao;Liu Cai Ming;Kou Hui Zhong
合成了4个新的2-甲基-6-（嘧啶-2-基-酰肼甲基）-苯酚（H2 L）的单核Fe（III）配合物1-4，并通过磁化率测量和单晶X-射线衍射分析进行了表征。配合物1-3是离子型化合物，分子式为[Fe（HL）2]X·nsolvent（X = ClO 4 −（1），BF 4 −（2）and Cl−（3）），而配合物4（[Fe（HL）（L）]）是中性的。配合物1-4中的中心Fe（III）离子与两个Schiff碱配体HL-或L2-的4个氮原子和2个氧原子配位，Fe（III）的配位构型均为畸变八面体构型。磁性测量表明，配合物1表现出一个自旋突变，热滞为32 K（T1/2↓ = 158 K，T1/2↑ = 190 K），配合物4表现出一个不完全的自旋突变.配合物2和3是高自旋的，室温下的χmT值分别为4.32 cm 3 K mol−1和4.39 cm 3 K mol−1。
Four new mononuclear Fe(III) complexes 1–4 of 2-methyl-6-(pyrimidin-2-yl-hydrazonomethyl)-phenol (H2L) have been synthesized and characterized by magnetic susceptibility measurements and single-crystal X-ray diffraction analysis. Complexes 1–3 are ionic compounds with the formula [Fe(HL)2]X·nsolvent (X = ClO4− (1), BF4− (2) and Cl− (3)), while complex 4 ([Fe(HL)(L)]) is neutral. The central Fe(III) ion in complexes 1–4 is coordinated by four nitrogen and two oxygen atoms of two Schiff base ligands HL− or L2−, and the coordination geometries of FeIII are all distorted octahedral. Magnetic measurements indicate that complex 1 shows an abrupt spin transition with a thermal hysteresis of 32 K (T1/2↓ = 158 K and T1/2↑ = 190 K), and complex 4 exhibits a gradual incomplete spin transition. Complexes 2 and 3 are high spin with a room-temperature χmT value of 4.32 cm3 K mol−1 and 4.39 cm3 K mol−1, respectively.