A Ga‐MIL‐53‐type Framework based on 1,4‐Phenylenediacetate Showing Subtle Flexibility

A Ga‐MIL‐53‐type Framework based on 1,4‐Phenylenediacetate Showing Subtle Flexibility
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基于 1,4â苯二乙酸酯的 GaâMILâ53â 型框架显示出微妙的灵活性

DOI:
10.1002/zaac.201900241
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发表时间:
2019
期刊:
Zeitschrift für anorganische und allgemeine Chemie
影响因子:
--
通讯作者:
Helge Reinsch
Helge Reinsch
中科院分区:
--
文献类型:
--
作者:
Timo Rabe;Helge Reinsch

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以硝酸镓、1,4‐苯二乙酸(H2PDA)和氢氧化钠为原料,在100℃条件下反应24 h,合成了新型MOF Ga‐MIL‐53‐PDA [Ga(OH)(O2C‐C8H8‐CO2)]·H2O(1)。该产物与典型的MIL‐53结构类似。通过粉末X射线衍射(PXRD)数据的Rietveld细化确定了其晶体结构。采用1,4‐苯二丙酸(H2PDP)进一步合成,得到了致密的层状配位聚合物[Ga2(OH)4(O2C‐C10H12‐CO2)](2)和[Ga(OH)(O2C‐C10H12‐CO2)](3),可以建立精确的结构模型。所有化合物都被充分表征并测试了潜在的呼吸行为。最值得注意的是,Ga‐MIL‐53‐PDA在脱水/再水化过程中表现出微妙的柔韧性,这也证实了它的多孔性,但没有观察到剧烈的结构变化。
The new MOF Ga‐MIL‐53‐PDA [Ga(OH)(O2C‐C8H8‐CO2)]·H2O (1) was synthesized by a hydrothermal reaction of gallium nitrate, 1,4‐phenylenediacetic acid (H2PDA) and sodium hydroxide at 100 °C for 24 h. The product is a structural analogue of the archetypical MIL‐53 framework. Its crystal structure was determined by Rietveld refinement of powder X‐ray diffraction (PXRD) data. Furthermore 1,4‐phenylenedipropionic acid (H2PDP) was employed for further synthesis, which resulted in the dense layered coordination polymers [Ga2(OH)4(O2C‐C10H12‐CO2)] (2) and [Ga(OH)(O2C‐C10H12‐CO2)] (3), for which accurate structural models could be established. All compounds were fully characterized and tested regarding potential breathing behavior. Most remarkably, Ga‐MIL‐53‐PDA showed a subtle flexibility upon de/‐rehydration also confirming its porosity, but no drastic structural changes were observed.
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