Influence of Anions in Silver Supramolecular Frameworks: Structural Characteristics and Sorption Properties.

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• 作者：Irene Bassanetti ; Francesco Mezzadri ; Angiolina Comotti ; Piero Sozzani ; Marcello Gennari ; Gianluca Calestani ; Luciano Marchi貌
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：June 6, 2012
• 年：2012
• 卷：134
• 期：22
• 页码：9142-9145
• 全文大小：343K
• 年卷期：v.134,no.22(June 6, 2012)
• ISSN：1520-5126

文摘

The complexation of a preorganized thioether-functionalized bis(pyrazolyl)methane ligand (L) with silver precursors produces supramolecular structures organized at two hierarchical levels: [AgL]₆(X)₆ metal鈥搊rganic cyclic hexamers and their organization in 3D architectures. The cyclic toroidal hexamers of 22鈥?6 脜 external diameter are found to be stable already in solution before self-assembly into the crystalline state. In the 3D lattice, the hexameric building block are arranged in different highly symmetric space groups as a function of a variety of anions (cubic Fd3̅ with PF₆^{鈥?/sup> or BF₄鈥?/sup> and rhombohedral R3̅ with CF₃SO₃鈥?/sup> or NO₃鈥?/sup>) and form cavities with the geometrical shapes of Platonic solids (tetrahedron and octahedron) that can be occupied by a variety of solvent molecules. Upon evacuation, cubic crystals can produce stable frameworks with permanent porosity, which can absorb reversibly several vapors, CO₂ and CH₄.}