Syntheses, Structures, and Properties of Silver鈥揙rganic Frameworks Constructed with 1,1鈥?Biphenyl-2,2鈥?6,6鈥?tetracarboxylic Acid

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• 作者：Bo Li ; Shuang-Quan Zang ; Can Ji ; Hong-Wei Hou ; Thomas C. W. Mak
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：March 7, 2012
• 年：2012
• 卷：12
• 期：3
• 页码：1443-1451
• 全文大小：580K
• 年卷期：v.12,no.3(March 7, 2012)
• ISSN：1528-7505

文摘

The reactions of 1,1鈥?biphenyl-2,2鈥?6,6鈥?tetracarboxylic acid (H₄bptc), N-containing auxiliary ligand, with different silver(I) salts under hydrothermal or solvent evaporation conditions yielded five unusual complexes with distinct structural features: {[Ag₄(bptc)(bpy)₄(H₂O)]路(H₂O)₁₂}_n (1), {[Ag_1.5(bptc)_0.5(bpy)_1.5]路(NH₄)_0.5路(H₂O)₃}_n (2), {[Ag₂(H₂bptc)(bpy)₂]路(H₂O)₂}_n (3), {[Ag₂(H₂bptc)(bpy)₂]路(HClO₄)}_n (4), and {[Ag(H₂bptc)_0.5(bpe)]路(H₂O)₂}_n (5) (bpy = 4,4鈥?bipyridine, bpe = 1,2-bis(4-pyridyl)ethene). Complexes 1鈥?b>3 and 5 exhibit two-dimensional (2D) layer, and such layers are further united together to generate three-dimensional supramolecular structure through hydrogen bonding and 蟺路路路蟺 interactions, respectively. In complexes 1 and 2, butterfly shaped 16-membered water ring and infinite water tape are obtained, respectively. Both compounds 4 and 5 are 2-fold interpenetrated 3D frameworks. Complex 4 shows channels along the c axis that are occupied by the perchloric acid molecules. Different from robust 4, the 3D supramolecular architecture of 5 is based on the formation of hydrogen bonding between (H₂O)₄ cluster and the adjacent layers. In addition, the thermogravimetric analysis, powder X-ray diffraction (XRD), and photoluminescent behavior of the complexes have also been investigated.