Non-invasive monitoring of the growth of metal-organic frameworks (MOFs) via Raman spectroscopy.
Non-invasive monitoring of the growth of metal-organic frameworks (MOFs) via Raman spectroscopy.
复制标题
通过拉曼光谱对金属有机框架 (MOF) 的生长进行非侵入性监测。
DOI：
10.1039/d3cp01004j
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Chong MWS
中科院分区：
文献类型：
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作者：
Chong MWS
拉曼光谱用于金属有机框架（MOF）的相鉴别的适用性已经用F4_MIL-140 A（Ce）和F4_UiO-66（Ce）证明;从相同的金属和配体源制备的类似物。每种类似物都表现出独特的拉曼峰，在对结构变化更敏感的低频区域具有显著差异。非侵入性拉曼监测F4_MIL-140 A（Ce）的合成表明，一个独特的MOF拉曼峰的演变与反应的进展，该拉曼信号的结晶程度的转换是在良好的协议与报道的反应动力学确定通过同步加速器衍射方法。此外，拉曼光谱表明反应中存在的硝酸调节剂的初始快速消耗与预期的高成核概率一致。拉曼光谱是一种很有前途的技术，用于快速筛选的MOFs，并可用于研究其形成的机制，在原位与动力学洞察到的溶液和固相的反应介质。
The applicability of Raman spectroscopy for phase discrimination of metal–organic frameworks (MOFs) has been demonstrated with F4_MIL-140A(Ce) and F4_UiO-66(Ce); analogues prepared from the same metal and ligand sources. Each analogue exhibits unique Raman peaks, with significant differences in the low frequency region, which is more sensitive to structural variations. Non-invasive Raman monitoring of F4_MIL-140A(Ce) synthesis indicated evolution of a unique MOF Raman peak with reaction progress; conversion of this Raman signal to extent of crystallisation was in good agreement with reported reaction kinetics determined via a synchrotron diffraction method. Additionally, Raman spectroscopy indicated initial rapid consumption of the nitric acid modulator present in the reaction coinciding with an expected high probability of nucleation. Raman spectroscopy is a promising technique for rapid screening of MOFs and can be used to study the mechanism of their formation in situ with kinetic insight into both the solution and solid phases of the reaction medium.