Site‐Selective Catalysis of a Multifunctional Linear Molecule: The Steric Hindrance of Metal–Organic Framework Channels

The site‐selective reaction of a multifunctional linear molecule requires a suitable catalyst possessing both uniform narrow channel to limit the molecule rotation and a designed active site in the channel. Recently, nanoparticles (NPs) were incorporated in metal–organic frameworks (MOFs) with the t...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2018-06, Vol.30 (23), p.e1800643-n/a
Main Authors: Zhang, Weina, Zheng, Bing, Shi, Wenxiong, Chen, Xinyi, Xu, Zhiling, Li, Shuzhou, Chi, Yonggui Robin, Yang, Yanhui, Lu, Jun, Huang, Wei, Huo, Fengwei
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Diols
Functional groups
MATERIALS SCIENCE
metal nanoparticles
Metal-organic frameworks
Molecular chains
Nanoparticles
Oxidation
Porosity
porous structure
Sailing
site-selective catalysis
Steric hindrance
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Summary:The site‐selective reaction of a multifunctional linear molecule requires a suitable catalyst possessing both uniform narrow channel to limit the molecule rotation and a designed active site in the channel. Recently, nanoparticles (NPs) were incorporated in metal–organic frameworks (MOFs) with the tailorable porosity and ordered nanochannel, which makes these materials (NPs/MOFs) highly promising candidates as catalytic nanoreactors in the field of heterogeneous catalysis. Inspired by a “Gondola” sailing in narrow “Venetian Canal” without sufficient space for a U‐turn, a simple heterogeneous catalyst based on NPs/MOFs is developed that exhibits site‐selectivity for the oxidation of diols by restricting the random rotation of the molecule (the “Gondola”) in the limited space of the MOF channel (the narrow “Venetian Canal”), thereby protecting the middle functional group via steric hindrance. This strategy is not limited to the oxidation of diols, but can be extended to the site‐selective reaction of many similar multifunctional linear molecules, such as the reduction of alkadienes. Novel heterogeneous catalysts, nanoparticles (NPs)/metal–organic frameworks (MOFs), exhibit site‐selectivity for multifunctional molecules by restricting the random rotation of the molecule in the limited space of the metal–organic‐framework channel, thereby protecting the middle functional group via steric hindrance. This strategy can also be extended to the site‐selective reaction of many similar multifunctional linear molecules, such as oxidation of diols and reduction of alkadienes.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201800643