Cryometry data in the binary systems bis-adduct of C60 and indispensable aminoacids - lysine, threonine, oxyproline

Abstract

The article continues the development of the investigations, presented in particular in the cycle of articles, devoted to the synthesis, identification and investigation of physical-chemical properties of water soluble derivatives of light fullerene C 60 , such as: complex esters of dicarboxylic acids (malonates, oxalates); poly-hydroxylated forms (fullerenols); amino-acid derivatives (argenine, alanine). The investigation of the excess thermodynamic functions, to the best of our knowledge, has, until now, not been provided, except for two original works [Matuzenko M.Yu., Tyurin D.P., et al. (2015); Matuzenko M.Yu., Shestopalova A. A., et al. (2015)].

Cryometry and excess thermodynamic functions in water soluble of the fullerenol C60(OH)24

“…IfFig. 3one can observe very good agreement between our data and data from[36], despite on some inconsistency in the composition.FIG. 3.…”

“…For the calculation of water activity we have used well-known equation, got from the equality of the chemical H 2 O potentials in pure solid ice and non-ideal liquid solution [34][35][36][37][38]:…”

“…The investigation of the excess thermodynamic functions in such systems (activities, activity coefficients, excess (or mixing) Gibbs energies (enthalpies, entropies) etc, as authors know, until this time was not provided, except for some original works [33][34][35][36][37][38]. In these articles, in the binary systems with the help of cryometry investigations, the authors determined the decrease of the temperatures of the beginning of ice crystallization (liquidus temperatures), water activities, water activity coefficients, and then, numerically solving the Gibbs-Duhem equation -activities and activity coefficients of fullerene derivatives.…”

The use of nanocluster polyoxometalates in the bioactive substance delivery systems

“…One of the ways of modifying the surface of fullerenes provides hydroxylated derivatives such as fullerenols [195,200,205,206,208]. The specific functionalization of their surface is achieved through the use of amphiphilic polymers, amino acids, carboxylic acids, and biologically active preparations that identify molecules [206,207]. Fullerenes can be coated with biocompatible materials (encapsulation), e.g., with polyvinylpyrrolidone while conjugates including cytostatic preparations and antibodies to the corresponding cell type, can be used for delivering chemotherapeutic drugs to tumor cells.…”

Solubility phase equilibrium in ternary system fullerenol C60(OH)24 and praseodymium salt: PrCl3-C60(OH)24-H2O at 25 C

“…This article continues the cycle of publications, concerning the synthesis, identification and physico-chemical, physical, bio-chemical, biological properties investigation of the amino-acid-light fullerene adducts [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. This article is devoted to the investigation of the solubility diagram for systems containing water soluble fullerene nanoclusters, inorganic salt, including rare earth metals and actinoids, and water, as the solvent [20][21][22][23][24].…”