Metalloid Al- and Ga-clusters:: a novel dimension in organometallic chemistry linking the molecular and the solid-state areas?
Metalloid Al- and Ga-clusters:: a novel dimension in organometallic chemistry linking the molecular and the solid-state areas?
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DOI：
10.1039/b507002n
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发表时间：
2005-01-01
影响因子：
4
通讯作者：
Schnöckel, H
中科院分区：
文献类型：
--
作者：
Schnöckel, H
在稳定的金属化合物之间的金属-金属键的形成和断裂，其中金属原子被氧化（例如。G.溶液中的孤立物质或本体中的金属盐）和本体金属是理解该过程的基本步骤，其中作为中间体的准金属Al和Ga簇的形成和化学行为是必不可少的。许多类金属Al和Ga簇的例子表明，它们的形成反映了高度的复杂性，就像大块金属本身看似简单的形成一样：从含有小分子实体的亚稳态Al（I）和Ga（I）溶液开始，类金属簇在许多自组织步骤中生长，包括聚集以及不可逆的氧化还原级联。这类新的簇似乎在分子和固态区域之间开辟了化学的新维度，因为，第一次，它表明，在精心选择的条件下，确定的分子物种，即类金属簇，通过形成额外的金属-金属键而生长，固体金属代表最后一步。
Formation and fragmentation of metal - metal bonds on the way between stable metal compounds in which the metal atoms are oxidised ( e. g. isolated species in solution or metal salts in bulk) and the bulk metal are the fundamental steps to understand this process in which formation and chemical behaviour of metalloid Al and Ga clusters as intermediates are essential. Many examples of metalloid Al and Ga clusters show that their formation reflects a high degree of complexity like that of the simple seeming formation of the bulk metal itself: starting from metastable Al(I) and Ga( I) solutions containing small molecular entities, metalloid clusters grow during many self-organization steps including aggregation as well as irreversible redox cascades. This novel class of clusters seems to open a new dimension in chemistry between the molecular and the solid-state area, because, for the first time, it is shown that under well selected conditions definite molecular species, i.e. metalloid clusters, grow via the formation of additional metal - metal bonds and that the solid metal represents the final step.