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Synthesis and structure investigation of immobilized heterometallic complexes
142 properties of a weak-base anion exchanger. It is stable in weakly alkaline, neutral and acid solutions. In neutral solutions it has complex-forming properties with respect to copper, chromium, cobalt and manganese ions. In 0.1-6 M HC1 solutions the sorbent enters into selective interactions with ions of noble metals, the maximal saturation of the polymer from a 0.1 M HC1 solution with metal ions being for platinum 85, palladium 87, rhodium 132.5, and iridium 155 mg/g. The sorption equilibrium is established within 20-30 min. The distribution coefficients are for platinum(IV) 3.5 x 103 and for iridium(IV) 3 × 103. The polymer complex-forming sorbent may be employed for the extraction of noble metals in the form of beads or fibrous material filled with small beads ( 1 0 - 1 6 / , m ) of the sorbent. Not intended for publication.
Synthesis and Structure Investigation of Immobilized Heterometailic Complexes I . E . U f l y a n d , N . D . G o l u b e v a , A . G . S t a r i k o v a n d A . D . P o m o g a i l o , State Pedagogical Institute, Rostov-on-Don, U.S.S.R. a n d Institute of Chemical Physics, Academy of Sciences of the U.S.S.R., Chernogolovka, U.S.S.R. Immobilized heterometallic complexes with controlled 1 : 1 distribution of metals were synthesized by the reaction of copper(II), nickel(II) or cobalt(II) tetradentate azomethine chelates with TiC14 and VC14 fixed on polyethylenegrafted poly(allyl alcohol). IR spectra of heterometallic complexes indicate the formation of coordination bonds between Ti(IV) or V(IV) and oxygen atoms. Electronic spectra of the nickel(II) and cobalt(II) complexes were analyzed. The decrease of magnetic moments of the complexes at low temperatures points to the presence of coupling interactions of antiferromagnetic type in these systems. The influence of Cu(II), Ni(II) or Co(II) on the kinetics of ethylene polymerization in the presence of fixed Ti(IV) or V(IV) compound is discussed. To be submitted to
ReactivePolymers.
Immobilized Mono- and Binuclear Chelates of Nickel(II) and Cobalt(II) I.E. U f l y a n d a n d A . D . P o m o g a i l o , State Pedagogical Institute, Rostov-on-Don, U.S.S.R. a n d Institute of Chemical Physics, Academy of Sciences of the U.S.S.R., Chernogolovka, U.S.S.R. Polyethylene-bearing chelating groups of the diketone, aminoketone and diacylamine types were synthesized from polyethylene-grafted polyacrylonitrile, polyacrylamide and poly(methyl vinyl ketone). Ni(II) and Co(II) complexes of the chelating polymers were prepared and characterized. Based on the electronic spectra data, the degree of covalency and splitting parameters were calculated. IR spectra confirm the chelate structure of the complexes. Magnetic properties of the complexes were investigated at 80-300 K. Magnetic moments of mononuclear complexes do not change with decreasing temperature whereas those of binuclear complexes decrease, suggesting the presence of a coupling interaction of antiferromagnetic type in these systems. To be submitted to
Reactive Polymers.
Copper(II) Complexes with Salicyioylacrylamides fixed on Polytetrafluoroethylenes I.E. Uflyand,
A.S. Kusharov,
A.D.
Pomogailo, M.O. Gurbunova a n d V . N . S h e i n k e r , State U.S.S.R. a n d Institute of Chemical Physics, Academy of
Pedagogical Institute, Rostov-on-Don, Sciences of the U.S.S.R., Chernogolovka, U.S.S.R.
Polytetrafluoroethylene surface was functionalized by gas-phase grafting of acrylic acid. The copolymer containing 5 to 20 wt.% of grafts was further reacted with thionyl chloride and salicylamide to give polytetrafluoroethylene grafted with polysalicyloylacrylamide. UV and IR data support the suggested diacylimine structure. Cu(II) complexes of the grafted polysalicyloylacrylamide were prepared and their chelate structure was established by spectral data.
Synthesis and Structure Investigation of Immobilized Heterometailic Complexes I . E . U f l y a n d , N . D . G o l u b e v a , A . G . S t a r i k o v a n d A . D . P o m o g a i l o , State Pedagogical Institute, Rostov-on-Don, U.S.S.R. a n d Institute of Chemical Physics, Academy of Sciences of the U.S.S.R., Chernogolovka, U.S.S.R. Immobilized heterometallic complexes with controlled 1 : 1 distribution of metals were synthesized by the reaction of copper(II), nickel(II) or cobalt(II) tetradentate azomethine chelates with TiC14 and VC14 fixed on polyethylenegrafted poly(allyl alcohol). IR spectra of heterometallic complexes indicate the formation of coordination bonds between Ti(IV) or V(IV) and oxygen atoms. Electronic spectra of the nickel(II) and cobalt(II) complexes were analyzed. The decrease of magnetic moments of the complexes at low temperatures points to the presence of coupling interactions of antiferromagnetic type in these systems. The influence of Cu(II), Ni(II) or Co(II) on the kinetics of ethylene polymerization in the presence of fixed Ti(IV) or V(IV) compound is discussed. To be submitted to
ReactivePolymers.
Immobilized Mono- and Binuclear Chelates of Nickel(II) and Cobalt(II) I.E. U f l y a n d a n d A . D . P o m o g a i l o , State Pedagogical Institute, Rostov-on-Don, U.S.S.R. a n d Institute of Chemical Physics, Academy of Sciences of the U.S.S.R., Chernogolovka, U.S.S.R. Polyethylene-bearing chelating groups of the diketone, aminoketone and diacylamine types were synthesized from polyethylene-grafted polyacrylonitrile, polyacrylamide and poly(methyl vinyl ketone). Ni(II) and Co(II) complexes of the chelating polymers were prepared and characterized. Based on the electronic spectra data, the degree of covalency and splitting parameters were calculated. IR spectra confirm the chelate structure of the complexes. Magnetic properties of the complexes were investigated at 80-300 K. Magnetic moments of mononuclear complexes do not change with decreasing temperature whereas those of binuclear complexes decrease, suggesting the presence of a coupling interaction of antiferromagnetic type in these systems. To be submitted to
Reactive Polymers.
Copper(II) Complexes with Salicyioylacrylamides fixed on Polytetrafluoroethylenes I.E. Uflyand,
A.S. Kusharov,
A.D.
Pomogailo, M.O. Gurbunova a n d V . N . S h e i n k e r , State U.S.S.R. a n d Institute of Chemical Physics, Academy of
Pedagogical Institute, Rostov-on-Don, Sciences of the U.S.S.R., Chernogolovka, U.S.S.R.
Polytetrafluoroethylene surface was functionalized by gas-phase grafting of acrylic acid. The copolymer containing 5 to 20 wt.% of grafts was further reacted with thionyl chloride and salicylamide to give polytetrafluoroethylene grafted with polysalicyloylacrylamide. UV and IR data support the suggested diacylimine structure. Cu(II) complexes of the grafted polysalicyloylacrylamide were prepared and their chelate structure was established by spectral data.