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首页> 外文期刊>Chemistry: A European journal >Host-Guest [2+2] Cycloaddition Reaction: Postsynthetic Modulation of CO2 Selectivity and Magnetic Properties in a Bimodal Metal-Organic Framework
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Host-Guest [2+2] Cycloaddition Reaction: Postsynthetic Modulation of CO2 Selectivity and Magnetic Properties in a Bimodal Metal-Organic Framework

机译：主客体[2 + 2]环加成反应：双峰金属-有机骨架中CO2选择性和磁性的合成后调控

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摘要

Simultaneous tuning of permanent porosity and modulation of magnetic properties by postsynthetic modification (PSM) with light in a metal-organic framework is unprecedented. With the aim of achieving such a photoresponsive porous magnetic material, a 3D photoresponsive biporous framework, MOF1, which has 2D channels occupied by the guest 1,2-bis(4-pyridyl)ethylene (bpee), H2O, and EtOH molecules, has been synthesized. The guest bpee in 1 is aligned parallel to pillared bpee with a distance of 3.9 angstrom between the ethylenic groups; this allows photoinduced PSM of the pore surface through a [2+2] cycloaddition reaction to yield MOF2. Such photoinduced PSM of the framework structure introduces enhanced CO2 selectivity over that of N-2. The higher selectivity in MOF2 than that of MOF1 is studied through theoretical calculations. Moreover, MOF2 unveils reversible changes in T-c with response to dehydration- rehydration. This result demonstrates that photoinduced PSM is a powerful tool for fabricating novel functional materials.
机译：在金属有机框架中通过光进行后合成修饰（PSM）来同时调节永久孔隙率和调节磁性质是前所未有的。为了实现这种光敏多孔磁性材料，具有3D光敏双孔框架MOF1具有2D通道，该2D通道被客体1,2-双（4-吡啶基）乙烯（bpee），H2O和EtOH分子占据。已合成。 1中的客体bpee与柱状bpee平行排列，烯键之间的距离为3.9埃;这允许通过[2 + 2]环加成反应对孔表面进行光诱导的PSM，从而生成MOF2。这种光致骨架结构的PSM引入了比N-2更高的CO2选择性。通过理论计算研究了MOF2中比MOF1更高的选择性。此外，MOF2揭示了T-c对脱水-脱水反应的可逆变化。该结果表明，光诱导的PSM是用于制造新型功能材料的有力工具。

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