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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Developing a magnetic metal organic framework of copper bearing a mixed azido/butane-1,4-dicarboxylate bridge: magnetic and gas adsorption properties
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Developing a magnetic metal organic framework of copper bearing a mixed azido/butane-1,4-dicarboxylate bridge: magnetic and gas adsorption properties

机译：开发铜轴承铜的磁性金属有机框架混合的氮杂基/丁烷-1,4-二羧酸桥：磁性气体吸附性能

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摘要

A magnetic metal organic framework {[Cu(but-1,4-dc)(0.5)(N-3)(H2O)]H2O}(n) (MFUM-1(Cu)) (but-1,4-dc = butane-1,4-dicarboxylate) was synthesized and characterized structurally and magnetically. In MFUM-1(Cu), each Cu-II ion has a distorted octahedral geometry with an obvious Jahn-Teller distortion, where the coordination environment is composed of mixed EO-azido/aliphatic based carboxylate/H2O threefold bridges. These bridges extend the structure of MFUM-1(Cu) in two dimensions by covalent connectivity and form square-shaped channels. Also, a study was done to determine the effectiveness of sonochemical synthesis for the preparation of nano-sheets of MFUM-1(Cu) and subsequently the influence of particle size on physical properties such as magnetic behavior and thermal stability. The particles were characterized by elemental analyses, infrared spectroscopy (IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and powder X-ray diffraction (PXRD) analyses. The effects of parameters such as concentration, solvent, and reaction time on the size distribution, morphology, and yield of product were carefully studied. The magnetic properties of MFUM-1(Cu) and corresponding nano-structure were examined which indicated metamagnetism with strong intrachain ferromagnetic coupling versus the weak interchain antiferromagnetic coupling. Finally, the application of MFUM-1(Cu) in the separation of carbon dioxide from nitrogen and also from methane was theoretically investigated. High calculated selectivity of CO2 over N-2 and CH4 reveals the potential application of MFUM-1(Cu) in practical systems of gas separation.
机译：磁性金属有机框架{[Cu（但-1,4-DC）（0.5）（0.5）（N-3）（H 2 O）] H 2 O}（N）（MFum-1（Cu））（但是-1,4-DC =在结构上和磁性地合成并表征丁烷-1,4-二羧酸盐。在MFUM-1（CU）中，每个CU-II离子具有扭曲的八面体几何形状，具有明显的Jahn-Talker畸变，其中协调环境由混合EO-Azido /脂族基羧酸盐/ H2O三倍桥组成。这些桥梁通过共价连通性在两个尺寸中延伸了MFUM-1（CU）的结构，并形成方形通道。此外，完成了一项研究以确定有多种化素合成的纳米片材纳米-1（Cu）的合成的有效性，并随后对粒度对磁性性能和热稳定性的影响。通过元素分析，红外光谱（IR），扫描电子显微镜（SEM），热重分析（TGA）和粉末X射线衍射（PXRD）分析来表征粒子。仔细研究了参数浓度，溶剂和反应时间对产品的尺寸分布，形态和产量的影响。检查了MFUM-1（Cu）和相应的纳米结构的磁性，其指示具有强烈的内夹铁磁耦合与弱间隔反铁磁耦合的元磁性。最后，理论上研究了MFUM-1（Cu）在从氮气中分离二氧化碳的分离中的应用。在N-2和CH4上的CO 2的高计算选择性显示MFUM-1（CU）在天然气分离系统中的潜在应用。

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