• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >A Novel Network Structure of Organometallic Clusters in the Gas Phase
【24h】

A Novel Network Structure of Organometallic Clusters in the Gas Phase

机译：气相有机金属团簇的新型网络结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the gas phase, novel network structures were found in organometallic clusters between metal atoms produced by laser ablation and organic ligand molecules. For 3d metal-benzene, M_nBz_m, two kinds of structures of multiple sandwich and rice-ball were formed, depending on the metal elements. Early transition metals (M_E) of Sc, Ti, and V form the multiple-decker sandwich structure of (n, m) = (n, n + 1) in which metal atoms and benzene are alternately piled up, while late transition metals (M_L) of Fe, Co, and Ni form the rice-ball structure in which central metal clusters were fully covered by benzene molecules. The ionization energy of M_E-Bz drops significantly with increasing layers, which can be explained by delocalization of d electrons along the molecular axis. M-C_(60) binary clusters were also generated by a two-laser vaporization method; M_E-C_(60) clusters efficiently form a chain or a ring structure consisting of a dumbbell unit, in which metal atoms and C_(60) are alternately connected. For M_L-C_(60) clusters, however, the metal atom is tricapped by C_(60) and a face-centered tetrahedron structure is formed at (n, m) = (4, 4). A similar multiple-decker sandwich structure is formed also between lanthanide metal atoms (Ln) and an organic ligand of cyclooctatetraene (COT). The Ln-COT cluster is a charge transferred cluster consisting of positively charged Ln and negatively charged COT. Their electronic structure is fairly ionic and is localized around each metal atom. These novel structures of organometallic clusters should inspire new thoughts in material science because it is hoped that the regular arrangement of metal ions can introduce useful properties such as electroconductivity and magnetism.
机译：在气相中，在激光烧蚀产生的金属原子与有机配体分子之间的有机金属簇中发现了新的网络结构。对于3d金属苯，M_nBz_m，根据金属元素的不同，形成了多种三明治和饭团两种结构。 Sc，Ti和V的早期过渡金属（M_E）形成（n，m）=（n，n +1）的多层夹心结构，其中金属原子和苯交替堆积，而晚期过渡金属（ Fe，Co和Ni的M_L）形成了饭团结构，其中中心金属簇被苯分子完全覆盖。 M_E-Bz的电离能随着层数的增加而显着下降，这可以用d电子沿着分子轴的离域来解释。 M-C_（60）二元团簇也通过两激光汽化方法生成。 M_E-C_（60）簇有效地形成由哑铃单元组成的链或环结构，其中金属原子和C_（60）交替连接。但是，对于M_L-C_（60）簇，金属原子被C_（60）束缚，并且在（n，m）=（4，4）处形成面心四面体结构。镧系元素金属原子（Ln）和环辛酸酯（COT）的有机配体之间也形成了类似的多层夹心结构。 Ln-COT簇是由正电荷的Ln和负电荷的COT组成的电荷转移簇。它们的电子结构相当离子化，位于每个金属原子周围。有机金属团簇的这些新颖结构应该激发材料科学的新思想，因为希望金属离子的规则排列可以引入有用的性质，例如导电性和磁性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号