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Cross-Linked Poly-Vinyl Polymers versus Polyureas as Designed Supports for Catalytically Active M0 Nanoclusters. Part I. Nanometer Scale Structure of the Polyurea Support EnCatTM 40

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F07%3A00091364" target="_blank" >RIV/67985858:_____/07:00091364 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Cross-Linked Poly-Vinyl Polymers versus Polyureas as Designed Supports for Catalytically Active M0 Nanoclusters. Part I. Nanometer Scale Structure of the Polyurea Support EnCatTM 40

  • Original language description

    The cross-linked polymer EnCatTM 40 (polyurea) is investigated on the micro-(ESEM) and nanometer scale (ISEC, ESR, 13C CP MAS NMR) both in the dry (ESEM, 13C CP MAS NMR) and in the swollen state (ISEC, ESR, 13C CP MAS NMR). After swelling with THF or DMF, nanoporous domains featured by ca. 1.2 nm pores are clearly detected with ISEC. ESR analysis based on the evaluation of the rotational mobility of a suitable spin probe dissolved in THF, DMF, MeOH and PhCH3 as swelling media, does qualitatively confirmthe presence of nanoporosity also in MeOH- and PhCH3-swollen EnCatTM 40. Our manifold analysis reveals the lack of any detectable nanoporosity in water.

  • Czech name

    Srovnání vlastností zesítěných vinylových polymerů a polymočoviny jako optimalizovatelných nosičů katalyticky aktivních kovových nanoklastrů. Část I. Nanometrická struktura polymočovinového nosiče EnCatTM 40

  • Czech description

    Zesítěný polymer EnCatTM 40 (polymočovina) byl zkoumán v mikrometrickém (SEM) i nanometrickém měřítku ((ISEC, ESR, 13C CP MAS NMR) a to jak v suchém stavu (ESEM, 13C CP MAS NMR), tak i ve zbobtnalém stavu (ISEC, ESR, 13C CP MAS NMR). Po zbobtnání v THF nebo DMF, byly v polymeru pomocí ISEC zjištěny nanoporézní domény s póry o velikosti cca 1,2 nm. ESR měření rotační mobility vhodné sondy v prostředí THF, DMF, MeOH and PhCH3 kvalitativně potvrdila existenci nanoporozity v EnCatTM 40 zbobtnalém v MeOH a vPhCH3. Naše mnohonásobná analýza prokázala absenci jakékoli porozity ve vodném prostředí.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CI - Industrial chemistry and chemical engineering

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Journal of Molecular Catalysis A-Chemical

  • ISSN

    1381-1169

  • e-ISSN

  • Volume of the periodical

    275

  • Issue of the periodical within the volume

    1-2

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    7

  • Pages from-to

    233-239

  • UT code for WoS article

  • EID of the result in the Scopus database