The locations of the 0 0 0 -bands for S 1 ← S 0 and S 1 → S 0 transitions have been found for C 60 solutions in hexane. It is shown that the profile of the S 1 ← S 0 band is mainly shaped by h u (4), t 1u (4)-and h g (1), a g (2)-modes that are active in absorption. Bands involving the h u (4)-and t 1u (4)-modes in the emission process have also been identified in the fluorescence spectrum. The appearance of the 0 0 0 -band in the forbidden 1 1 T 1g ← 1 1 A g transition is explained by symmetry reduction in the C 60 +environment system due to the interaction of electrons with local phonons. The temperature coefficients of the red shift for the 256.3-and 328.3-nm bands of allowed 1 T 1u ← 1 1 A g transitions for C 60 in hexane are equal to -1.45 and -0.46 cm -1 ⋅K -1 , respectively. The peak and half-width values of the 337.2-nm band for C 60 in polystyrene remain unchanged on cooling to 77 K. Absorption in the 700-800-nm region for concentrated hexane solutions of fullerene at 292 K results from the production of (C 60 ) n -clusters.Keywords: vibronic spectra, broadening, temperature effect, dispersion interactions, 0-0 band, solvatochromic shift, (C60)n-clusters.Introduction. The spectral properties of fullerene C 60 are interesting because of the broad application of materials based on carbon nanoparticles in science, industry, and medicine [1][2][3][4][5][6][7]. The solution of several astrophysical problems was also directly related to the study of the spectral properties of fullerenes [8,9]. Polymers that can be used as a basis for creating optical emission limiters, photo-conducting materials, and materials suitable for transforming solar energy into electrical are being sought [3, 10-12]. For example, the ability of C 60 bound covalently to phthalocyanine to transform long-lived (0.2 ms) photoinduced states with charge separation [11] was used to fabricate a solar cell in which the polymer matrix acted as an external light-collecting antenna and effected charge transfer into the reaction center, the phthalocyanine-fullerene dyad [12].Fullerene C 60 is a spherical molecule with point-group symmetry I h . The unique structure is responsible for its unusual photophysical properties that differ substantially from those of heterocyclic compounds. The vibronic spectra of C 60 exhibit both allowed and symmetry-forbidden transitions. Extensive theoretical and experimental investigations enabled bands and lines in spectra of fullerene C 60 to be identified [9,[13][14][15][16][17][18][19][20][21][22][23][24][25][26] and general trends of the shift upon changing the nature of the medium to be explained [13,14]. As a rule, n-alkanes were used as the solvents [13,14]. The bands and symmetry assignment of transitions for C 60 have been described in detail [16]. Measurements at low temperatures were made in glassy solvents such as toluene [15], 3-methylpentane, and hexane [16,17] at 77 K, in inert-gas matrices at 4.2 K and lower [9,18,19,26], and in the gas phase (in molecular beams cooled by expansion) [21][22][23][24]....

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Structure, mechanical and electrical properties of thin films prepared by means of co-deposition of fullerenes C 60 and titanium were studied. The obtained results show the potential applicability of titanium-fullerene films as electrotechnical materials and coatings.Keywords: titanium-fullerene films / structure / mechanical and electrical properties / Die Struktur und die mechanischen und elektrischen Eigenschaften von dünnen Fulleren C 60 -Titan-Schichten, die über Abscheidungsverfahren hergestellt wurden, wurden untersucht. Die erzielten Ergebnisse zeigen mögliche Anwendungen von Titan-Fulleren-Filmen als elektrotechnische Materialien und Beschichtungen.

The physical and chemical principles of the preparation of carbon nanoparticles (fullerenes, carbon nanotubes) and their complexes, and the methods for introducing nanoparticles into metal, ceramic and polymer matrices are considered. The most important properties of some materials containing these cluster molecules are given. It is shown that the introduction of carbon nanoparticles into materials, even in small fractions (up to 1.0 wt. %), significantly in some cases, at times alters their structure, electrical and tribological properties.