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Electrooptical and Molecular Properties of Fullerene-Containing Poly(Methyl Methacrylates) Prepared by Introducing Fullerenes C60 and C70 into the Polymer Structure by Different Methods

“…By contrast to the PMMA-1, PMMA-23C 60 , and PMMA-43C 60 samples, for which we revealed no enhanced degree of branching of the chains [18], the PMMA-33C 60 macromolecules were branched, as predetermined by the synthesis conditions, at which reactions of C 60 with amino derivatives yield star-like adducts of fullerene with a random number of addition sites [15,23]. This is confirmed by an increase in the molecular weight of PMMA-33C 60 by a factor of 3.5 relative to that of PMMA-3.…”

“…Thinlayer chromatography on SiO 2 plates showed that the product contained the fullerene convalently bound to the polymer, as well as free fullerene from which the product was separated by reprecipitation from chloroform. A similar reaction between fullerene C 60 and polyvinylpyrrolidone bearing a terminal 3NH 2 group yielded a product containing 60 wt % homopolymer [15]. This suggests that PMMA-33C 60 contains the initial polymer which is difficult to separate from the overall product.…”

Water-Soluble Polymeric Methanofullerene and Fulleropyrrolidine Derivatives

“…In chromatography on Sorbfil silica gel plates, the eluent (toluene, chloroform, CCl 4 ), C 60 , MFs, and FPs move along with the solvent front, while PVP3NH 2 is irreversibly adsorbed, remaining at the start zone. Under these conditions, the complex of C 60 with PVP decomposes [2,3], and two zones are observed in the chromatograms, namely, those of C 60 and PVP. In the cases of previously described covalent C 60 derivatives of PVP3NH 2 (PVP3C 60 ) [2,3], C 60 is not eluted, and the only colored zone at the start is observed.…”

Synthesis and Polar and Electrooptical Properties of a Butylamine Derivative of Fullerene C60

“…Covalent bonding in the A3C 60 synthesized was confirmed by the UV, 13 C NMR, and IR studies. The UV spectrum of A3C 60 in chloroform is a monotonically descending curve with a small inflection near 260 nm, characteristic of covalent derivatives of C 60 [6].…”

“…By contrast to fullerenes C 60 and C 70 , their amino derivatives are well soluble in organic solvents [2] and surpass unmodified fullerenes in photophysical properties [3]. A large potential of fullerenecontaining materials and easy preparation of fullerene compounds with amines stimulated in recent years synthesis of various amine derivatives of C 60 and C 70 [235], including water-soluble derivatives suitable for studying the biological activity [6]. It was noted that ÄÄÄÄÄÄÄÄÄÄÄÄ the reaction products of fullerenes with amines include regioisomers with different numbers of amine molecules added [2,7310] and also that the composition and properties of amine derivatives of fullerenes are strongly dependent on the synthesis conditions [7].…”