Flux Growth of an Intermetallic with Interstitial Fluorides via Decomposition of a Fluorocarbon
Flux Growth of an Intermetallic with Interstitial Fluorides via Decomposition of a Fluorocarbon
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通过碳氟化合物的分解，金属间化合物与间隙氟化物的通量增长
DOI：
10.1021/acs.inorgchem.2c03642
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发表时间：
2023
影响因子：
4.6
通讯作者：
Latturner, Susan E.
中科院分区：
文献类型：
--
作者：
Larson, James T.;Latturner, Susan E.
La15(FeC6)4F2是在十氟联苯(C12F10)同时作为碳源和氟源的存在下，通过在La/Ni共晶熔剂中与铁反应生长出来的。这种温和的氟化技术能够分离出含有氟化物间隙的金属间化合物，而不是形成离子金属氟化物。该化合物采用六方晶系结构，空间群为P6̅，其特征是FeC6单元由一个中心铁原子组成，三个乙烯基团以三角平面构型配位。其结构与以前报道的La15(FeC6)4H有关，但由于氟化物完全占据了间隙氢化物位置，导致了邻层稀土离子的部分占据和位置分裂无序。没有观察到超级细胞的形成。
La15(FeC6)4F2was grown as large crystals by reacting iron in a La/Ni eutectic flux in the presence of decafluorobiphenyl (C12F10) which acts as both a carbon and fluoride source. This mild fluorinating technique enables the isolation of an intermetallic product containing fluoride interstitials, as opposed to forming ionic metal fluorides. The compound adopts a structure in the hexagonal crystal system with space groupP6̅ which features FeC6units composed of a central iron atom coordinated by three ethylenide units in a trigonal planar configuration. The structure is related to the previously reported La15(FeC6)4H, but with fluoride fully occupying the interstitial hydride positions, which induces partial occupancies and site splitting disorder in the adjacent layers of lanthanide ions. No supercell formation is observed.