The Interaction of Guest Molecules with Co-MOF-74: A Vis/NIR and Raman Approach.
The Interaction of Guest Molecules with Co-MOF-74: A Vis/NIR and Raman Approach.
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DOI：
10.1002/anie.201801966
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发表时间：
2018-06
影响因子：
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通讯作者：
Ina Strauss;Alexander Mundstock;Dominik Hinrichs;Rasmus Himstedt;A. Knebel;C. Reinhardt;Dirk Dorfs
中科院分区：
文献类型：
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作者：
Ina Strauss;Alexander Mundstock;Dominik Hinrichs;Rasmus Himstedt;A. Knebel;C. Reinhardt;Dirk Dorfs
通过溶剂热法合成了长度为数百微米的Co-MOF-74棒状晶体，并评价了它们与不同气体的相互作用以用于选择性气体传感。我们发现Co-MOF-74晶体在偏振光照射下具有强烈的各向异性吸收行为。用各种光谱技术研究了客体（CO2、丙烷、丙烯、Ar、MeOH、H2 O）与Co-MOF-74的相互作用。维斯/NIR显示Co-MOF-74的峰位移取决于与客体的相互作用。在可见光和NIR中，最大吸光度选择性地对应于CoII -客体相互作用的强度而移动。甚至丙烯和丙烷也可以在室温下通过它们与Co-MOF-74的不同相互作用来区分。拉曼光谱用于检测Co-MOF-74在气体吸附时的改变的振动行为。我们表明，吸附的H2 O导致的拉曼光谱中的峰的最大值的特征位移。
Co-MOF-74 rod like crystals with a length of several hundred micrometers are synthesized by a solvothermal procedure and their interaction with different gases is evaluated for selective gas sensing. We show strongly anisotropic absorption behavior of the Co-MOF-74 crystals when illuminated with polarized light. The interactions of guests (CO2 , propane, propene, Ar, MeOH, H2 O) with Co-MOF-74, is studied by various spectroscopic techniques. Vis/NIR shows peak shifts of Co-MOF-74 depending on the interaction with the guest. In the visible and the NIR the maximum absorbance is shifted selectively corresponding to the intensity of the CoII -guest interaction. Even propene and propane could be distinguished at room temperature by their different interactions with Co-MOF-74. Raman spectroscopy was used to detect a modified vibrational behavior of Co-MOF-74 upon gas adsorption. We show that the adsorption of H2 O leads to a characteristic shift of the peak maxima in the Raman spectra.