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通过在介孔结构金属有机框架材料MIL-101(Cr)和MIL-100(Al)的孔洞中合成自旋交叉化合物[Fe(HB(pz)_3)_2]的方法 ,可以得到SCO@MOF复合物。通过红外光谱(FTIR)、粉末X射线衍射(PXRD)、原子吸收光谱(AAS)以及气体吸附-脱附等进行了进一步测试。通过变温磁测量对复合材料的温度诱导自旋转换行为的研究表明,复合材料的自旋转换行为发生改变甚至是消失了。复合材料的这一现象可以解释为[Fe(HB(pz)_3)_2]在MOF主体材料的孔洞中形成了一种新的结晶相,且孔壁压力将会阻碍[Fe(HB(pz)_3)_2]从低自旋态向高自旋态转变。不同SCO@MOF复合物得到了相似的自旋转换行为结果。这确认了当自旋交叉化合物在金属有机框架材料孔洞中形成时,MOFs材料的限制压力或基体效应对其自旋转换行为的影响显然是至关重要的。
The SCO @ MOF composite can be obtained by synthesizing the spin-cross compound [Fe (HB (pz) _3) _2] in the pores of the mesostructured metal organic framework materials MIL-101 (Cr) and MIL-100 Things. Further tests were carried out by infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), atomic absorption spectroscopy (AAS) and gas adsorption-desorption. The temperature-induced spin-conversion behavior of composites by temperature-dependent magnetic measurements shows that the spin-conversion behavior of the composites changes or even disappears. The phenomenon of the composite material can be explained by the fact that [Fe (HB (pz) _3) _2] forms a new crystalline phase in the pores of the MOF host material and the wall pressure will hinder [Fe (HB _3) _2] Transition from low spin state to high spin state. Similar spin-transition behavior results were obtained for different SCO @ MOF complexes. This confirms that when the spin-on compounds are formed in the pores of the metal-organic framework material, it is clearly crucial that the MOFs’ limiting pressure or matrix effect on their spin-transfer behavior is affected.