Light scattering in aqueous solutions of fullerene-containing polymers

Metal-free thermally-responsive pseudohybrid nanoparticles based on 2-hydroxypropyl-β-cyclodextrin

“…Additional information about the behavior of investigated pseudohybrid nanoparticles in aqueous solutions can be obtained by means of static light scattering (SLS). [28][29][30][31] Relative light scattering intensity C w /(IÀI solv ) (C w is weight concentration of nanoparticles, I and I solv are light scattering intensities of solution and solvent, respectively) for the pseudohybrid nanoparticles obtained at 25 C was observed to exhibit a striking drop by heat treatment within the range of 34-37 C. Fig. 5 shows the feature at 34-37 C just before a partial decomposition of the pseudohybrid nanoparticles (Fig.…”

Effect of Centrifugal Field upon Hydrodynamic Characteristics of Fullerene C60and Poly(N-vinylpyrrolidone) Complex in Aqueous Solutions

“…In particular, molar masses M SD obtained by sedimentation and diffusion analysis were close to M SD of the matrix polymer. [6,10,11] Intrinsic viscosity values [g] for the complex and the matrix polymer coincided, and sometimes the same dependencies of the specific viscosity on concentration were obtained. [5,6] In addition, the isothermal translational diffusion coefficient values for polymer-fullerene complexes were close to those for the matrix polymer.…”

“…[3][4][5] Investigation of fullerene C 60 and C 70 complexes with poly(Nvinylpyrrolidone) (PVP) by static (LS) and dynamic (DLS) lightscattering methods revealed that large, relatively stable intermolecular structures, which are referred to as clusters or domains, are formed in their dilute solutions, which can be detected even at very small dilutions. [5][6][7][8][9][10][11] Molar masses M w of clusters obtained by the light-scattering method are one to two orders of magnitude greater than those of matrix polymers used for complex preparation. Cluster molar mass (MM) and size depend on the polymer and solvent nature, fullerene content, fullerene type, and the MM of the polymer.…”

“…Under these conditions, the presence of clusters in polymer-fullerene complex solutions was identified, which became apparent as the 204 E. Tarabukina et al diffusion boundary dispersion declined from the straight line at high time values. [9][10][11] No detailed investigations of the effect of external forces on the cluster organization of fullerene-containing polymer solutions were carried out. However, a study of this kind may be useful in order to understand the nature of intermolecular interactions responsible for polymerfullerene cluster formation.…”