Syntheses, Structures, and Gas Adsorption Properties of Two Novel Cadmium鈥揝odium Organic Frameworks with 1,3,5-Benzenetricarboxylate Ligands

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• 作者：Ying Fu ; Jie Su ; Zhibo Zou ; Sihai Yang ; Guobao Li ; Fuhui Liao ; Jianhua Lin
• 刊名：Crystal Growth & Design
• 出版年：2011
• 出版时间：August 3, 2011
• 年：2011
• 卷：11
• 期：8
• 页码：3529-3535
• 全文大小：1047K
• 年卷期：v.11,no.8(August 3, 2011)
• ISSN：1528-7505

文摘

Solvothermal reactions of Cd(CH₃COO)₂路2H₂O and NaOH with 1,3,5-benzenetricarboxylic acid (H₃BTC) in a mixture of H₂O/DMA (DMA = N,N鈥?dimethylacetamide) gave rise to two novel 3D porous metal鈥搊rganic frameworks (MOFs), [Cd₃Na₆(BTC)₄(H₂O)₁₂]路H₂O (1) and [Cd₃Na₂(BTC)₃(H₂O)₃]路[H₂N(CH₃)₂]路H₂O (2), which were characterized by single crystal and variable temperature powder X-ray diffraction (VTPXRD), IR spectroscopy, elemental analyses, inductively coupled plasma measurements, and coupled thermogravimetric鈥搈ass spectrometric analyses. Compound 1 crystallizes in the tetragonal space group P4₂/n and could be described as a 2-fold interpenetrated net having a boracite (bor) topology, bridged by {Na₃O₁₂} trimers. Compound 2 crystallizes in the monoclinic space group Cc with 1D channels distributed in an unusual honeycomb fashion along the b-axis. {Na₂O₁₀} dimers, (CH₃)₂NH₂⁺ ions, and guest water are located in these channels. TG-MS and VTPXRD studies revealed that 1 had a high thermal stability up to 340 掳C under air, and 2 was stable up to 310 掳C. The gas-adsorption investigation disclosed that compound 1 exhibited H₂ uptake of 1.11 wt % at 77 K and 1.0 bar, with a high adsorption heat (8.4 kJ mol^鈥?).