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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Coordinative interaction between nitrogen oxides and iron-molybdenum POM Mo72Fe30
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Coordinative interaction between nitrogen oxides and iron-molybdenum POM Mo72Fe30

机译：氮氧化物与铁 - 钼POM MO72FE30之间的协调相互作用

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The process of adsorption of nitrogen monoxide and dioxide by the giant Keplerate nanocluster Mo72Fe30 was studied in detail under ambient conditions and air/argon atmosphere. The obtained Raman and IR spectra showed that the coordination of NOx to the Mo72Fe30 leads to the formation of nitrate ions by sharing the bridged or terminal oxygen in FeO6 polyhedra with the adsorbed NO2 molecules. In accordance with elemental analysis and X-ray photoelectron spectroscopy, the composition of the produced complex was found to be [POM-(NO2)(x)](NO2)(y) (where x = 6, y = 14 +/- 3). The carried out thermal analysis revealed the significant influence of NOx coordination in the release of water molecules and decomposition of the constitutional acetate ligands for Mo72Fe30. Furthermore, the performed measurements of the temperature dependency of the electron paramagnetic resonance spectra for the pure nanocluster and that treated with NO2 allowed us to draw up a conclusion about the delocalization of weak-bonded NO2 molecules in the pores of the Mo72Fe30 crystal at 25 degrees C. The opposite situation was observed under cryogenic temperatures. The localization of NO2 molecules occurs resulting in the distortion of FeO6 octahedra towards tetrahedral symmetry accompanied with the appearance of the signal at g-factor 4.3. The produced complex compound [POM-(NO2)(x)](NO2)(y) possesses sufficient NO2 capacity, water solubility and pH-dependant decomposition; these are important properties of a potential NOx donor, which can be hypothetically applied in biomedicine.
机译：在环境条件和空气/氩气氛下，详细研究了巨型孔纳米光幕MO72FE30的氮一氧化物和二氧化氮的吸附过程。所得拉曼和IR光谱显示NOx与MO72FE30的配位通过在FeO6多面体中与吸附的NO 2分子共享桥接或末端氧来形成硝酸根离子。根据元素分析和X射线光电子能谱，发现所产生的复合物的组成为[POM-（NO 2）（x）]（NO 2）（Y）（其中x = 6，y = 14 +/- 3）。进行的热分析显示NOx协调在释放水分子中的显着影响和MO72FE30的结构乙酸盐配体的分解。此外，对纯纳细簇的电子顺磁共振谱的温度依赖性的进行测量允许我们允许我们在25度下呈现MO72FE30晶体孔中弱粘合的NO2分子的分解的结论C.在低温温度下观察到相反的情况。出现NO 2分子的定位，导致FeO6八面物朝向四面体对称的畸变伴随着在G因子4.3处的信号的外观。所产生的复合化合物[POM-（NO2）（X）]（NO 2）（NO 2）（NO 2）具有足够的NO 2容量，水溶性和pH依赖性分解;这些是潜在的NOx供体的重要特性，其可以在生物医学中被假设施用。

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