Heussner, Kirsten; Grabau, Mathias; Forster, Johannes; Streb, Carsten published an article in 2011, the title of the article was Can Hydrophobic Interactions Influence Supramolecular Aggregation in Self-Assembled Organic-Inorganic Hybrid Structures?.Category: alcohols-buliding-blocks And the article contains the following content:
This study aims to provide insights into the ability of amphiphilic cations to influence the assembly of hybrid organic-inorganic crystal lattices using hydrophobic interactions. To study the hypothesis, a prototype amphiphilic cation, tert-butyldiethanolammonium, was employed together with molybdenum oxide clusters of increasing size and charge in the self-assembly of type I hybrid systems. The molybdate clusters were used as model inorganic building blocks as they can be formed in situ and their size and charge can be adjusted by pH control. Using this strategy, three hybrid structures were obtained and characterized using single-crystal x-ray diffraction, theor. bond valence sum calculations, elemental anal., FTIR spectroscopy, TG and theor. Hirshfeld anal. Heptamolybdate Na5[tBuNH(C2H4OH)2][Mo7O24]·ca. 14H2O (1) was isolated, which features sodium-linked dimeric cluster species and isolated octadecanuclear sodium clusters. Octamolybdate [tBuNH(C2H4OH)2]4[Mo8O26]·ca. 4H2O (2) was isolated, containing the octanuclear β-[Mo8O26]4- cluster. At low pH levels (below pH 2), [tBuNH(C2H4OH)2]14[Mo36O112(H2O)16][Mo36O112(H2O)14{tBuNH(C2H4OH)2}2]·ca. 36H2O (3) was obtained, which is based on a 36-center molybdenum oxide cluster. Crystallog. anal. of the assemblies showed that the formation of hydrophobic regions within the crystal lattice is affected by the size of the inorganic building blocks employed. In 1 and 2, the hydrophobic tert-Bu groups of the amphiphilic cations aggregate into hydrophobic assemblies. In contrast, the structural arrangement in 3 is dominated by the large inorganic cluster and the organic cations are incorporated as isolated units. This behavior is further supported by theor. Hirshfeld surface anal. of the organic counterions, which suggests that, with increasing cluster size, the contribution of long-range, hydrophobic intermol. interactions decreases, which is in line with the crystallog. anal. for 1-3. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Category: alcohols-buliding-blocks
The Article related to heptamolybdate octamolybdate polymolybdate amphiphilic butyldiethanolammonium preparation crystal supramol structure, crystal structure heptamolybdate octamolybdate polymolybdate amphiphilic butyldiethanolammonium salt and other aspects.Category: alcohols-buliding-blocks
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