Počet záznamů: 1  

Salphen-Co(III) complexes catalyzed copolymerization of epoxides with CO2

  1. 1.
    SYSNO ASEP0443098
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevSalphen-Co(III) complexes catalyzed copolymerization of epoxides with CO2
    Tvůrce(i) Hošťálek, Z. (CZ)
    Mundil, R. (CZ)
    Císařová, I. (CZ)
    Trhlíková, Olga (UMCH-V) RID, ORCID
    Grau, E. (FR)
    Peruch, F. (FR)
    Cramail, H. (FR)
    Merna, J. (CZ)
    Zdroj.dok.Polymer. - : Elsevier - ISSN 0032-3861
    Roč. 63, 20 April (2015), s. 52-61
    Poč.str.10 s.
    Jazyk dok.eng - angličtina
    Země vyd.GB - Velká Británie
    Klíč. slovacobalt salphen catalyst ; CO2 epoxide copolymerization ; MALDI-TOF
    Vědní obor RIVCD - Makromolekulární chemie
    Institucionální podporaUMCH-V - RVO:61389013
    UT WOS000353365400008
    EID SCOPUS84925000134
    DOI10.1016/j.polymer.2015.02.018
    AnotaceThe series of novel symmetric and asymmetric salphen cobalt (III) complexes with different counteranions (trichloroacetate, dinitrophenolate, pentafluorobenzoate and acetate) was synthesized and used as catalysts in copolymerization of CO2 with propylene oxide (PO) and cyclohexene oxide (CHO). Hexacoordinated structure of complexes adducts was found in solid phase. The effect of catalyst structure, temperature, CO2 pressure, catalyst/cocatalyst ratio on overall activity and selectivity was investigated. Synthesized salphen-Co (III) complexes were effective for both PO/CO2 and CHO/CO2 highly alternating copolymerization. Substitution of phenylene framework of salphen ligand by chlorine atom led to decrease of activity in PO/CO2 copolymerization. Complexes with trichloroacetate counteranion were shown to be the most active and selective in PO/CO2 copolymerization leading to poly(propylenecarbonate) with highest molar mass. On contrary, catalytic performance of salphen Co (III) complexes in CHO/CO2 copolymerization was almost independent on ligand structure and counteranion. Excellent selectivity to poly(cyclohexenecarbonate) was achieved even at 0.1 MPa CO2. MALDI-TOF analysis of polycarbonates was used to investigate the initiation step of the copolymerization.
    PracovištěÚstav makromolekulární chemie
    KontaktEva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
    Rok sběru2016
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.