Physico-chemical properties of the C60-tris-malonic derivative water solutions

Physico-chemical properties of the C60-arginine water solutions

“…The latest fact reveals that addition of even small portions of the C 60 -Arg derivative extremely compact and structures the solution. Similar behavior of concentration dependences of partial molar volumes was previously observed in our scientific group for such water-soluble fullerene derivative as polyhydroxy-and carboxy-fullerenes [8,11,12]. It is noteworthy that crossing of the average molar volume through the minimum (Fig.…”

“…11. Analogous behavior with multistage dehydration and decarboxylation was previously observed for carboxylated fullerene-C 60 [(C(COOH) 2 ] 3 [11]. Analysis of Fig.…”

“…We can point out the following regularities: (i) we have not detected monomer molecules (with linear dimension equal to δ 0 ≈ 2 nm) in all investigated solutions even in very diluted; (ii) the presence of the «first type associates» with linear dimension δ 1 ≈ 40-50 nm was observed in comparatively dilute solutions (С С 60 −Arg N 0.0125 g·dm with formation of viscous and gelatinous solutions including "huge associates" with linear dimension δ 4 ≈ n1 ÷ n10 μm (units or tens of μm). In this case the destroying of stable colloid solution takes place; (iv) for the description of such experimental facts in the association process the model of consequent hierarchical association model was used [11,12]. We consider that monomer spherical molecular form first type spherical associates, than first type spherical associates form second type spherical associates (first and second type associates form nano-colloid solutions), than second type spherical associates form third type spherical associates (the third type associates corresponds to the colloid heterogeneous system), than third type spherical associates form forth type spherical associates (the forth type associates corresponds to destroying colloid system).…”

“…Water-soluble derivatives of fullerenes have great potential due to unique structural, physical, and chemical properties and especially due to possibilities of practical application in various fields of science and technology in particular in biology and medicine due to promising biological activity of such compounds [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Physico-chemical properties of the water-soluble C70-tris-malonic solutions

“…Analysis of literature reveals the lack of the experimental data devoted to investigation of physico-chemical properties of water-soluble derivatives of fullerenes and there solutions although such kind of research is a basis for the developing and optimization of the water-soluble fullerenes derivatives application. We can cite only several papers devoted to physico-chemical study of the water-soluble fullerenols, C 60 -carboxyfullerene and amino acid derivatives of C 60 water solutions [13][14][15][16][17][18][19][20][21][22].…”