Tuning of Gate Opening of an Elastic Layered Structure MOF in CO2 Sorption with a Trace of Alcohol Molecules
Tuning of Gate Opening of an Elastic Layered Structure MOF in CO2 Sorption with a Trace of Alcohol Molecules
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DOI：
10.1021/la201008v
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发表时间：
2011-06-07
期刊：
影响因子：
3.9
通讯作者：
Kanoh, Hirofumi
中科院分区：
文献类型：
--
作者：
Cheng, Yan;Kajiro, Hiroshi;Kanoh, Hirofumi
调节金属有机骨架材料的吸附行为是一个重要的研究课题。[Cu（bpy）（2）（BF 4）（2）]是一种代表性的柔性MOF，其在CO2吸附上显示出迷人的门现象，乙醇处理对水合形式的[Cu（bpy）（2）（BF 4）（2）]引起更容易的脱水和CO2门压的显著降低。IR、X射线衍射（XRD）和X射线吸收精细结构（XAFS）测量的结果表明，即使在室温下，乙醇处理后，水合形式的晶格中的水分子也可以被去除，并且基本的2D层状结构保持有轻微的层间膨胀。热重（TG）和气相色谱/质谱（GC/MS）分析和CO2吸附的结果表明，门现象的变化是由微量的残留乙醇分子的结构。在不同极性和分子大小的醇中观察到类似的现象。
It is important to tune the sorption behavior of metal organic framework (MOF) materials. Ethanol treatment on the hydrated form of [Cu(bpy)(2)(BF4)(2)], which is a representative flexible MOF showing the fascinating gate phenomenon on CO2 sorption, induces an easier dehydration and a significant decrease in the CO2 gate pressure. The results of IR, X-ray diffraction (XRD), and X-ray absorption fine structure (XAFS) measurements indicated that water molecules in the lattice of the hydrated form can be removed even at room temperature after the ethanol treatment and the basic 2D layered structure remains with a slight interlayer expansion. The results of thermogravimetric (TG) and gas chromatograph/mass spectrometry (GC/MS) analyses and of CO2 sorptions indicated that the change of the gate phenomenon was caused by a trace of residual ethanol molecules included in the structure. Similar phenomena were observed on alcohols with different polarity and molecular size.