5 years ago

Semipermeable Organic–Inorganic Hybrid Microreactors for Highly Efficient and Size-Selective Asymmetric Catalysis

Semipermeable Organic–Inorganic Hybrid Microreactors for Highly Efficient and Size-Selective Asymmetric Catalysis
Lingyan Jing, Hengquan Yang, Fengwei Zhang, Xiaoming Zhang, Lijuan Wei
A highly efficient and size-selective organic–inorganic hybrid microreactor was fabricated successfully by assembling the semipermeable microporous silica hollow nanospheres at the interface of organic polymers containing an asymmetric transfer hydrogenation catalyst. The small micropores in the silica shells (1.0–1.5 nm) of the microreactors provide short mass-transfer channels for small molecules but prevent the diffusion of large reactants through the shell. At the same time, the combination of the outer microporous silica and inner polymers endows the microreactor with hydrophobic@hydrophilic property, which helps its dispersion in water as well as the adsorption of reactant molecules from water, yielding an ideal microenvironment for water medium catalysis reactions. Such microreactors could efficiently catalyze the aqueous asymmetric transfer hydrogenation (ATH) of small-sized ketones with catalytic activity comparable to the homogeneous Rh-VBSDPEN catalyst (TOF 625 vs 724 h–1). Meanwhile, the microreactors also showed size selectivity toward large-sized reactants. Our studies provide an approach for the construction of artificial bioinspired microreactors with size-selective properties and favorable catalysis microenvironments.

Publisher URL: http://dx.doi.org/10.1021/acscatal.7b01659

DOI: 10.1021/acscatal.7b01659

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.