Synthesis, Structures, and Properties of Two Three-Dimensional Metal鈥揙rganic Frameworks, Based on Concurrent Ligand Extension

详细信息    查看全文

• 作者：Dabin Shi ; Yanwei Ren ; Huanfeng Jiang ; Bowei Cai ; Jiaxian Lu
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：June 18, 2012
• 年：2012
• 卷：51
• 期：12
• 页码：6498-6506
• 全文大小：454K
• 年卷期：v.51,no.12(June 18, 2012)
• ISSN：1520-510X

文摘

A tritopic carboxylate ligand, tris(4鈥?carboxybiphenyl)amine (L-H₃), has been synthesized and applied in the construction of microporous metal鈥搊rganic frameworks (MOFs). Two novel metal鈥搊rganic frameworks (MOFs), {[Zn₂(L)(OH)]路2DMF路H₂O}_{鈭?/sub> (1) and {[Cu(L-H)(DMA)]路DMA路2H2O}鈭?/sub> (2), have been constructed out of L-H3, Zn²⁺, and Cu²⁺, respectively. 1 has a 2-fold interpenetrating three-dimensional framework formed by L connectors and the [Zn2(CO2)3] secondary building units (SBUs). As for 1, it is worth pointing out that one 渭2鈥揙H group links two Zn atoms between two neighboring SBUs to produce interesting Zn鈥揙鈥揨n zigzag chains in the structure. 2 has a two-dimensional grid sheet formed by L-H connectors and the typical paddle-wheel [Cu2(CO2)4] SBUs. Two-dimensional (2D) sheets nest with each other, which finally forms a three-dimensional (3D) nested framework. Two MOFs are characterized by infrared (IR) spectroscopy, thermogravimetry, single-crystal and elemental analyses, and powder X-ray diffraction methods. Framework 1鈥?exhibits high permanent porosity (Langmuir surface area = 848 m²/g), high thermal stability (up to 450 掳C), highly active properties for Friedel鈥揅rafts alkylation reaction, as well as the potential application for the CO2 gas storage and luminescent material. The catalytic results reveal that 2鈥?is indeed an efficient heterogeneous catalyst for olefin epoxidation reactions.}