I. I. Adamenko

Structure and Thermophysical Properties of Fullerene C60 Aqueous Solutions

The structure and thermophysical properties of fullerene C60aqueous solutions were investigated both experimentally and theoretically. The aggregation kinetics results indicated that the structure of fullerene C60aggregates in water could be described as a fractal system. The IR and electronic absorption spectra obtained confirm the presence of the crystalline phase in aqueous solution. The numerical values of thermodynamic coefficientsαP,βT,βS,cP, andcV, and sound velocity were determined from the measured (P–V–T) data. The vibrational spectrum of the crystalline structure (Thsymmetry group) formed from the hydrated single fullerene C60molecules in aqueous solutions was calculated using the molecular dynamics approach.

Self-organization C60 nanoparticles in toluene solution

The structure of fullerene C60 in toluene solution was investigated both experimentally and theoretically in detail. C60 was found to aggregate slowly even in fairly dilute solution concentrations ranging from 0.18 to 0.78 g/l at room temperature. The electronic absorption spectra obtained testify to the mainly molecular character of absorption. The aggregation kinetics results indicated that the structure of C60 aggregates could be described as a fractal system. The numerical calculations predicted the formation of stable fullerene (C60)N clusters in toluene solution with sizes >1.2 nm and aggregation number N≥3.

Equation of state for C60 toluene solution

Abstract Thermodynamic properties of fullerene C60 solution in toluene were investigated in the range of pressures from 0.1 to 103.1 MPa and temperatures from 313 to 371 K. The correct equation of state for C60 toluene solution was determined using theexperimental PVT data.

STRUCTURE, VIBRATIONAL, AND CALORICAL PROPERTIES OF FULLERENE C60IN TOLUENE SOLUTION

The structure, vibrational and calorical properties of fullerene C60 in toluene solution were investigated both experimentally and theoretically in detail. The aggregation kinetics results indicated that the structure of C60 aggregates in toluene could be described as a fractal system. The electronic absorption spectra of C60 toluene solution with different concentration testify to the molecular character of absorption. The vibrational spectrum of smallest stable spherical cluster formed from the 13 single fullerene C60 molecules in toluene solution was calculated using the molecular dynamics approach and compared with Raman spectroscopy data. The numerical values of thermodynamical coefficients αP, βT,βS, cP, cV and sound velocity were determined from the (P-ρ-T) data measured for C60 toluene solution.

Thermodynamic properties of C60 fullerene water solution

The (P-V-T) data of C60 fullerene water solutions (C60FWS) were measured in dependence on the concentration of C60 molecules (0.05 and 0.15mg/ml) using the metallic bellows method with differential inductive sensor of linear shifts in the temperature range of 295 to 400K and pressure range of 0.1 to 153 MPa. The sound velocity (vs) in C60FWS was determined by the direct pulse method of fixed distance. The density (p) of C60FWS was measured using the pycnometer method. As a result, we found the numerical values for the isobaric coefficient of thermal expansion (α P ), the isothermal (βr) and adiabatic (β5) compressibility coefficients, and also the molar heat capacity (c p and c v ) for CfioFWS under ambient conditions.

The Model Calculation of the Phase (P-T) Diagram for Fullerene C60

Abstract A detailed theoretical study of the phase (P-T) diagram of fullerene C60 is carried out using both the thermodynamic principles and the calculated model based on the rigid molecules interacting via the (n-m) potential model.