Direct synthesis and mechanism of the formation of mixed metal Fe2Ni-MIL-88B
Direct synthesis and mechanism of the formation of mixed metal Fe2Ni-MIL-88B
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DOI：
10.1039/c3ce41453a
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发表时间：
2013-01-01
期刊：
影响因子：
3.1
通讯作者：
Trong-On Do
中科院分区：
文献类型：
--
作者：
Gia-Thanh Vuong;Minh-Hao Pham;Trong-On Do
采用紫外可见光谱、红外光谱、拉曼光谱和X射线衍射等表征技术对直接合成的Fe-3-MIL-88 B和Fe_2Ni-MIL-88 B进行了分析。发现由合成的第一阶段形成的单一金属Fe-3-M0 F-235晶种是用于形成MIL-88 B的前体。然后在单一金属的情况下将在合成的第一阶段中形成的Fe-3-M0 F-235晶种转化为Fe 3-MIL-88 B，并且在混合金属合成的情况下转化为混合的Fe 2Ni-MIL 88 B。在Fe-3-MIL-88 B和Fe 2Ni-MIL-88 B的两种情况下，FeCl 4-阴离子是形成M0 F-235的关键特征。还提出了阴离子介导的M0 F-235结构的形成机制。
The direct synthesis of Fe-3-MIL-88B and Fe2Ni-MIL-88B was analyzed using different characterization techniques including UV-vis, IR, and Raman spectroscopies and XRD. It was found that single metal Fe-3-MOF-235 seeds which were formed from the first stage of synthesis are precursors for the formation of MIL-88B. Fe-3-MOF-235 seeds formed in the first stage of synthesis were then transformed to Fe3-MIL-88B in the case of single metal, and to mixed Fe2Ni-MIL88B in the case of mixed metal synthesis. In the both cases of Fe-3-MIL-88B and Fe2Ni-MIL-88B, the FeCl4- anion is a key feature for the formation of MOF-235. An anion-mediated mechanism for the formation of the MOF-235 structure is also suggested.