Novel inorganic-organic-layered structures: crystallographic understanding of both phase and morphology formations of one-dimensional CdE (E = S, Se, Te) nanorods in ethylenediamine.
Novel inorganic-organic-layered structures: crystallographic understanding of both phase and morphology formations of one-dimensional CdE (E = S, Se, Te) nanorods in ethylenediamine.
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DOI：
10.1021/ic025846d
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发表时间：
2003-03
影响因子：
4.6
通讯作者：
Z. Deng;Libo Li;Yadong Li
中科院分区：
文献类型：
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作者：
Z. Deng;Libo Li;Yadong Li
通过S、Se或Te元素与Cd（2+）在适当的溶剂热温度下反应，得到了一类新型的无机-有机层状结构，即CdE.0.5en（E = S，Se，Te; en =乙二胺）.这些化合物包含由乙二胺分子间隔的无机CdE框架的原子片，乙二胺分子充当相邻无机层中的两个Cd原子之间的桥接配体，并且还防止这些无机板塌陷和冷凝成本体CdE相。从结构的角度来看，在乙二胺介导的溶剂热合成和独特的条纹形态的CdTe产品通过后水热处理的CdE.0.5en层状前体的形成的纳米棒的基本机制被揭示。的结构选择性结晶的II-VI族化合物半导体在乙二胺中的条件下的直接溶剂热合成或在后转换的层状前体也被解释的基础上，在前体中的无机板和那些在纤锌矿或锌的相之间的原子连接的相似性。此外，CdE.0.5en前体，其具有强的量子限制效应，这是由于其特殊的无机-有机结构与交替的CdE和乙二胺层，提供了进一步的可能性，定制其电子，磁性和光学性能，通过结构修饰的无机或有机成分。
A novel class of inorganic-organic-layered structures, CdE.0.5en (E = S, Se, Te; en = ethylenediamine), were obtained through reactions between elemental S, Se, or Te and Cd(2+) at appropriate solvothermal temperatures. These compounds contain atomic sheets of inorganic CdE frameworks spaced by ethylenediamine molecules, which serve as bridged ligands between two Cd atoms in neighboring inorganic layers and also prevent these inorganic slabs from collapsing and condensing into the bulk CdE phase. From the structural viewpoint, the essential mechanism for the formation of CdE nanorods in ethylenediamine-mediated solvothermal synthesis and the unique striated morphologies of the CdE products obtained through post-hydrothermal treatment of the CdE.0.5en layered precursors were revealed. The structure-selective crystallization of II-VI compound semiconductors in ethylenediamine under conditions of direct solvothermal synthesis or during the postconversion of the layered precursors was also explained on the basis of the similarity in atomic connectivity between the inorganic slabs in the precursors and those in wurtzite or zinc-blende phases. In addition, the CdE.0.5en precursors, which possess strong quantum-confinement effects resulting from their special inorganic-organic structures with alternating CdE and ethylenediamine layers, provide further possibilities of tailoring their electronic, magnetic, and optical properties through the structural modification of either the inorganic or the organic components.