Besides the conventional D5h(8149)-C70 fullerene, there are a large number of C70 isomers that violate the isolated pentagon rule (IPR). However, these non-IPR C70 fullerenes have been less investigated owing to their low stabilities or high reactivities. In this study, we report for the first time the X-ray structure of an unconventional endohedral C70 fullerene, Sc2O@C2(7892)-C70. The combine...

Owing amongst other to its high electron mobility, fullerene C70, has been widely used as an electron transporting layer in organic solar cells. In this research, we report the use of C70 thin films as electron transport layers of planar perovskite solar cells (PSCs) using a conventional device structure. The thickness of the C70 layer has been optimized to achieve the best efficiency of 12%. I...

The frictional behaviors of fullerenes C60 and C70 were studied because they were speculated to be solid lubricants. For the sublimated pure C60 films on Si(001), a high friction coefficient (0.55–0.8) was observed under different loads and pin materials. For the C70 film, the friction coefficient showed a pin dependence, which changed from 0.5 with an Al2O3 pin to about 0.9 with a 440 stainles...

Spin-lattice relaxation times T1 of photoexcited triplets (3)C70 in glassy decalin were obtained from electron spin echo inversion recovery dependences. In the range 30-100 K, the temperature dependence of T1 was fitted by the Arrhenius law with an activation energy of 172 cm(-1). This indicates that the dominant relaxation process of (3)C70 is described by an Orbach-Aminov mechanism involving ...

Optical absorption spectra of C70 and C76 are calculated by a tight binding model with a long ranged Coulomb interaction. The spectrum of C70 is in overall agreement with the experiment of molecules in a solution. The variations of the spectral shape are discussed relating with the symmetry reduction from C70 to C76.

C70(CF3)16 and C70(CF3)18, the first trifluoromethylated fullerene derivatives to comprise a pair of adjacent CF3 groups, have been isolated from a mixture obtained via reaction of C70 with CF3I, characterized in a single crystal XRD study and theoretically investigated at the DFT level of theory.

We describe the spontaneous chiral self-assembly of C70 with SnI4 as well a mixture C60 and SnI4. Macroscopic single crystals formula (C70)x(C60)1-x(SnI4)2 (x = 0-1) are reported. C60, which is spherical, C70, ellipsoidal, form solid solution in these crystals, cubic lattice parameter phase linearly increases x grows from 0 to 1 accordance Vegard's law. Our results demonstrate that nonspherical...

Two isomers of C70(CF3)12 have been isolated from a mixture obtained by trifluoromethylation of C70 with CF3I; their molecular structures determined by X-ray crystallography are in good agreement with the results of theoretical DFT calculations for the most stable C70(CF3)12 isomers.

Synthesis of fullerene oxides[C70(O)n] (n=1~3 or n=1) by fullerene [C70] and several oxidants such as 3-chloroperoxy benzoic acid, chromium(VI) oxide, benzoyl peroxide, trichloroisocyanuric acid take place under microwave irradiation. The MALDI-TOF MS, UV-visible spectra and HPLC analysis confirmed that the products of fullerene oxidation are [C70(O)n] (n=1~3 or n=1). Keyword : A.Fullerene oxid...

The radical anion spectra of C60 and C70 can be easily generated and studied in primary aliphatic amines. In these conditions the C60• and C70• species are accompanied by the dianions C60 and C70. In the near infrared region the electronic transitions at 1075, 1058 and 991 nm were assigned to C60• while those at about 1020-1030 nm and at 933 nm were assigned to the fullerene dianion C60 . The e...