Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, OR, 97331-4003, USA.
Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA.
Angew Chem Int Ed Engl. 2017 Aug 14;56(34):10161-10164. doi: 10.1002/anie.201702318. Epub 2017 May 16.
Multimeric oxo-hydroxo Al clusters function as models for common mineral structures and reactions. Cluster research, however, is often slowed by a lack of methods to prepare clusters in pure form and in large amounts. Herein, we report a facile synthesis of the little known cluster Al (OH) (H O) (SO ) (Al ) through a simple dissolution method. We confirm its structure by single-crystal X-ray diffraction and show by Al NMR spectroscopy, electrospray-ionization mass spectrometry, and small- and wide-angle X-ray scattering that it also exists in solution. We speculate that Al may form in natural water systems through the dissolution of aluminum-containing minerals in acidic sulfate solutions, such as those that could result from acid rain or mine drainage. Additionally, the dissolution method produces a discrete Al cluster on a scale suitable for studies and applications in materials science.
多聚氧羟铝簇合物可用作常见矿物结构和反应的模型。然而，由于缺乏制备纯态和大量簇合物的方法，簇合物研究往往进展缓慢。在此，我们通过简单的溶解方法报告了一种制备结构未知的 Al(OH)(H2O)(SO4)(Al)簇合物的简易方法。我们通过单晶 X 射线衍射证实了其结构，并通过 Al NMR 光谱、电喷雾电离质谱、小角和广角 X 射线散射表明其在溶液中也存在。我们推测，Al 可能通过含铝矿物在酸性硫酸盐溶液中的溶解在自然水系统中形成，例如可能由酸雨或矿山排水造成的那些溶液。此外，该溶解方法在适用于材料科学研究和应用的规模上产生了离散的 Al 簇。
