Ionic liquid accelerates the crystallization of Zr-based metal–organic frameworks

The Zr-based metal–organic frameworks are generally prepared by solvothermal procedure. To overcome the slow kinetics of nucleation and crystallization of Zr-based metal–organic frameworks is of great interest and challenging. Here, we find that an ionic liquid as solvent can significantly accelerat...

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Bibliographic Details
Published in:Nature communications 2017-08, Vol.8 (1), p.175-7, Article 175
Main Authors: Sang, Xinxin, Zhang, Jianling, Xiang, Junfeng, Cui, Jie, Zheng, Lirong, Zhang, Jing, Wu, Zhonghua, Li, Zhihong, Mo, Guang, Xu, Yuan, Song, Jinliang, Liu, Chengcheng, Tan, Xiuniang, Luo, Tian, Zhang, Bingxing, Han, Buxing
Format: Article
Language:English
Subjects:
639/301/299/921
639/638/224/907
639/638/77/887
Catalysts
Crystallization
Humanities and Social Sciences
Ionic liquids
Ions
Kinetics
Metal-organic frameworks
Metals
multidisciplinary
Organic solvents
Reaction kinetics
Science
Science (multidisciplinary)
Solvents
Zirconium
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Summary:The Zr-based metal–organic frameworks are generally prepared by solvothermal procedure. To overcome the slow kinetics of nucleation and crystallization of Zr-based metal–organic frameworks is of great interest and challenging. Here, we find that an ionic liquid as solvent can significantly accelerate the formation of Zr-based metal–organic frameworks at room temperature. For example, the reaction time is shortened to 0.5 h in 1-hexyl-3-methylimidazolium chloride for Zr-based metal–organic framework formation, while that in the conventional solvent N,N-dimethylformamide needs at least 120 h. The reaction mechanism was investigated in situ by 1 H nuclear magnetic resonance, spectroscopy synchrotron small angle X-ray scattering and X-ray absorption fine structure. This rapid, low-energy, and facile route produces Zr-based metal–organic framework nanoparticles with small particle size, missing-linker defects and large surface area, which can be used as heterogeneous catalysts for Meerwein–Ponndorf–Verley reaction. Crystallization kinetics of metal-organic frameworks in conventional organic solvents are usually very slow. Here, the authors show that an ionic liquid medium accelerates considerably the formation of Zr-based metal-organic frameworks that are active catalysts in the Meerwein-Ponndorf-Verley reaction.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-017-00226-y