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Multivalent Bifunctional Carbosilane Dendrimer Supported Ammonium and Phosphonium Organocatalysts for the Coupling of CO2 and Epoxides.

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F20%3A00531168" target="_blank" >RIV/67985858:_____/20:00531168 - isvavai.cz</a>

  • Alternative codes found

    RIV/44555601:13440/20:43895559

  • Result on the web

    <a href="http://hdl.handle.net/11104/0310792" target="_blank" >http://hdl.handle.net/11104/0310792</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1021/acssuschemeng.0c03367" target="_blank" >10.1021/acssuschemeng.0c03367</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Multivalent Bifunctional Carbosilane Dendrimer Supported Ammonium and Phosphonium Organocatalysts for the Coupling of CO2 and Epoxides.

  • Original language description

    Insertion of carbon dioxide into structure of organic epoxides leads to a formation of valuable cyclic carbonates and polycarbonates. For the purpose of this process, we report here a series of recyclable organocatalysts with superior activity. Carbosilane dendrimers (1st to 3rd generation) are employed as a support to which periphery ammonium or phosphonium centers are covalently attached to form a dendritic ionic liquid (DIL). Obtained DILs were tested as homogeneous catalysts in cycloaddition of CO2 to epoxides with respect to their activity and recyclability. The catalytic performance of active sites is enhanced by the presence of proximal hydroxyl group, playing the role of hydrogen bond donor. Experimentally observed synergistic effect was confirmed by Density Functional Theory (DFT) calculations. The activity of DILs is affected more by the structure of onium salt than by the size of support (dendrimer generation). Dendritic catalysts of all tested generations could be recovered by nanofiltration and repeatedly reused. In order to simplify the separation of the catalysts, composite materials were prepared by intercalating the more active ammonium dendrimers into the interlayer space of natural montmorillonite. Resulting heterogeneous catalysts were easily separable by centrifugation, while retaining reasonable level of activity.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10401 - Organic chemistry

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    ACS Sustainable Chemistry & Engineering

  • ISSN

    2168-0485

  • e-ISSN

  • Volume of the periodical

    8

  • Issue of the periodical within the volume

    31

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    12

  • Pages from-to

    11692-11703

  • UT code for WoS article

    000562123100022

  • EID of the result in the Scopus database

    2-s2.0-85091650441