Single-crystal-to-single-crystal intercalation of a low-bandgap superatomic crystal
Single-crystal-to-single-crystal intercalation of a low-bandgap superatomic crystal
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DOI：
10.1038/nchem.2844
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发表时间：
2017-12-01
期刊：
影响因子：
21.8
通讯作者：
Roy, Xavier
中科院分区：
文献类型：
--
作者：
O'Brien, Evan S.;Tuan Trinh, M.;Roy, Xavier
在固态化合物的晶格中可控地引入杂质是材料科学的基石。插层是将客体原子、离子或分子插入主体结构的原子层之间，可以在许多材料中产生新颖的电子、磁性和光学性质。在这里，我们描述了一种插层化合物，其中主体[Co 6 Te 8（（PPr 3）-Pr-n）（6）][C-60]（3）由原子精确的分子簇的二元组装形成，是传统层状原子化合物的超原子类似物。我们发现，四氰基乙烯（TCNE）可以插入到超结构通过单晶到单晶的转变。利用电子吸收光谱、电输运测量和电子结构计算，我们证明了插层是由主体[Co 6 Te 8（（PPr 3）-Pr-n）（6）][C-60]（3）和插层剂TCNE之间的电荷交换驱动的。这些结果表明，插层是一个强大的手段来操纵超原子晶体的材料性能。
The controlled introduction of impurities into the crystal lattice of solid-state compounds is a cornerstone of materials science. Intercalation, the insertion of guest atoms, ions or molecules between the atomic layers of a host structure, can produce novel electronic, magnetic and optical properties in many materials. Here we describe an intercalation compound in which the host [Co6Te8((PPr3)-Pr-n)(6)][C-60](3), formed from the binary assembly of atomically precise molecular clusters, is a superatomic analogue of traditional layered atomic compounds. We find that tetracyanoethylene (TCNE) can be inserted into the superstructure through a single-crystal-to-single-crystal transformation. Using electronic absorption spectroscopy, electrical transport measurements and electronic structure calculations, we demonstrate that the intercalation is driven by the exchange of charge between the host [Co6Te8((PPr3)-Pr-n)(6)][C-60](3) and the intercalant TCNE. These results show that intercalation is a powerful approach to manipulate the material properties of superatomic crystals.