Trapping Aluminum Hydroxide Clusters with Trisilanols during Speciation in Aluminum(III)-Water Systems: Reproducible, Large Scale Access to Molecular Aluminate Models.
Trapping Aluminum Hydroxide Clusters with Trisilanols during Speciation in Aluminum(III)-Water Systems: Reproducible, Large Scale Access to Molecular Aluminate Models.
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在铝 (III)-水系统的形态形成过程中用三硅烷醇捕获氢氧化铝簇：可重复、大规模地获得分子铝酸盐模型
DOI：
10.1002/ange.201604305
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发表时间：
2016
影响因子：
--
通讯作者：
C. Limberg
中科院分区：
文献类型：
--
作者：
K. S. Lokare;N. Frank;B. Braun-Cula;I. Goikoetxea;J. Sauer;C. Limberg
To gain molecular level insights into the properties of certain functions and units of extended oxides/hydroxides, suitable molecular model compounds are needed. As an attractive route to access such compounds the trapping of early intermediates during the hydrolysis of suitable precursor compounds with the aid of stabilizing ligands is conceivable, which was tested for the aluminum(III)/water system. Indeed, trisilanols proved suitable trapping reagents: their presence during the hydrolysis of AliBu2H in dependence on the amount of water used allowed for the isolation of tri‐ and octanuclear aluminum hydroxide cluster complexes [Al3(μ2‐OH)3(THF)3(PhSi(OSiPh2O)3)2] (1) and [Al8(μ3‐OH)2(μ2‐OH)10(THF)3(p‐anisylSi(OSiPh2O)3)4] (2).1can be regarded as the Al(OH)3cyclic trimer, where six protons have been replaced by silyl residues. While2features a unique [Al8(μ3‐OH)2(μ2‐OH)10]12+core. In contrast to most other known aggregates of this type,1and2can be readily prepared at reasonable scales, dissolve in common solvents, and retain an intact framework even in the presence of excessive amounts of water. This finding paves the way to future research addressing the reactivity of the individual functional groups.
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