Počet záznamů: 1

On the structure of polymeric composite of metallacarborane with poly(ethylene oxide)

  1. 1.
    0360030 - UMCH-V 2012 RIV US eng J - Článek v odborném periodiku
    Matějíček, P. - Brus, Jiří - Jigounov, Alexander - Pleštil, Josef - Uchman, M. - Procházka, K. - Gradzielski, M.
    On the structure of polymeric composite of metallacarborane with poly(ethylene oxide).
    Macromolecules. Roč. 44, č. 10 (2011), s. 3847-3855 ISSN 0024-9297
    Grant CEP: GA MŠk 2B08021
    Výzkumný záměr: CEZ:AV0Z40500505
    Klíčová slova: polymer * metallacarborane * poly(ethylene oxide)
    Kód oboru RIV: CB - Analytická chemie, separace
    Impakt faktor: 5.167, rok: 2011

    We studied a structure of polymeric composite based on spontaneous precipitation of sodium [3-cobalt(III) bis(1,2-dicarbollide)], NaCoD, with poly-(ethylene oxide), PEO, in salted aqueous solutions. Although the solid nanocomposite, which can be considered as a homogeneous matter, cannot form monocrystals due to the high flexibility of PEO chains, we can characterize the PEO/NaCoD structure by means of solid state NMR spectroscopy, from WAXS reflections and with help of already published structures of related systems. It indicates that the layered structure of solid NaCoD and the helical crystalline structure of PEO have disappeared after their mutual interaction. The NMR results clearly show that CoD_ anions are regularly dispersed within the PEO matrix, which consists of two distinct types of polymeric chains: one part interacting with dicarbollide clusters and the second one acting as a ligand of sodium counterions that also form regular pattern within the composite.
    Trvalý link: http://hdl.handle.net/11104/0006469