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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Mn-12 single-molecule magnets incorporated into mesoporous MCM-41 silica
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Mn-12 single-molecule magnets incorporated into mesoporous MCM-41 silica

机译：Mn-12单分子磁体结合到中孔MCM-41二氧化硅中

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摘要

The incorporation of four Mn-12 derivatives, namely [Mn12O12(O2CR)(16)(H2O)(4)] (R = CH3 (1), CH3CH2 (2), C6H5 (3), C6F5 (4)), into the hexagonal channels of the MCM-41 mesoporous silica have been studied. Only the smallest clusters I and 2 that are those with compatible size with the pores of MCM-41 could be incorporated into the mesoporous silica. Powder X-ray diffraction (XRD) analysis and N-2 adsorption-desorption isotherm experiments show that the well-ordered hexagonal structure of MCM-41 is preserved and that the Mn-12 clusters are inside the pores. The magnetic properties of the MCM-41/1 nanocomposite material indicate that the structure of the cluster is maintained after incorporation into the MCM-41 walls, but some differences appear that may be attributed to partial substitution of carboxylate groups of 1 by silanol groups of the wall surface. In contrast with the pristine Mn12 derivatives calcination of the composite samples gives rise to materials with similar properties to those observed before calcination. (C) 2003 Elsevier Science Ltd. All rights reserved. [References: 20]
机译：将四种Mn-12衍生物，即[Mn12O12（O2CR）（16）（H2O）（4）]（R = CH3（1），CH3CH2（2），C6H5（3），C6F5（4））掺入已经研究了MCM-41中孔二氧化硅的六角形通道。只有与MCM-41的孔大小兼容的最小簇1和2才能掺入中孔二氧化硅中。粉末X射线衍射（XRD）分析和N-2吸附-解吸等温线实验表明，MCM-41的六方六方结构得以保留，并且Mn-12簇处于孔内。 MCM-41 / 1纳米复合材料的磁性能表明，团簇的结构在掺入MCM-41壁后得以保持，但可能出现一些差异，这可能归因于1的羧酸盐基团被1的硅烷醇基团部分取代。墙面。与原始Mn12衍生物相反，复合样品的煅烧产生的材料具有与煅烧之前观察到的材料相似的性能。 （C）2003 Elsevier ScienceLtd。保留所有权利。 [参考：20]

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