Autowave processes of forming gels as a cause of the coloring of oxyhydrate gels (the chromatic effect) of some rare earth metals (yttrium, gadolinium)
Yi. Sukharev et al., Autowave processes of forming gels as a cause of the coloring of oxyhydrate gels (the chromatic effect) of some rare earth metals (yttrium, gadolinium), COLL SURF A, 194(1-3), 2001, pp. 75-84
Citations number
18
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
The authors attempted to find common reasons and regularities of inorganic
and organic biosystems gelation and the prime modeled representations of bi
osystems in the lifeless nature. With the help of a hydrodynamic model for
the movement of colloid-chemical motion of elements in hydroxide gels of ra
re earth metals (yttrium, gadolinium) the fluctuating character of excited
gel's behavior in a liquid media is shown. Account for the dipole-dipole in
teraction of gel's fragments in intermicellar solution allowed to prove mat
hematically the spiral shaped formation of a gel, which was certified exper
imentally. With the help of different methods of computer experiment, inclu
ding a molecular-dynamic modeling of polymeric hydroxide excited media, the
two-dimensional spiral-shaped formation of overmolecular fragments of yttr
ium, gadolinium. gels, characteristic of autowave processes, is found. Ther
e are given details of spiral formed vortexes. The effect of coloring the o
xyhydrate gels of some high-density metals (the chromatic effect), in parti
cular, the rare earth elements of yttrium., gadolinium., lanthanum, and oth
ers were experimentally discovered. The periodic, oscillating nature of the
change in the intensity of the gels color yttrium and gadolinium. oxyhydra
te over time has been demonstrated. Theoretical and calculation methods wer
e developed to explain the effect of coloring the oxyhydrate gels of high-d
ensity metals. (C) 2001 Elsevier Science B.V. All rights reserved. f