Riju C. Issac S. S. Harilal Geetha K. Varier C. V. Bindhu V. P. N. Nampoori C. P. G. Vallabhan Cochin University of Science and Technology International School of Photonics Laser Division Cochin 682 022, India Abstract. Pulsed photoacoustic studies in solutions of C70 in toluene are made using the 532-nm radiation from a frequency-doubled Nd:YAG laser. It is found that contrary to expectation, ...

Chemical oxidation is useful for solubilizing and separating endohedral metallofullerenes, as demonstrated here by a separation of three categories of Gd@C2n species and by the solubilization of Tm@C60+ and Tm@C70+ for the first time.

A new family of imidazoline-arylene macrocycles have been constructed through the simultaneous formation of four imidazoline rings in one step. These macrocycles can efficiently complex with fullerenes C60 and C70 through the formation of ground-state complexes.

The effect of alkyl chains in substituted diphenylmethano[70]fullerenes (C70-DPM) on the device characteristics of DPP(TBFu)2 small molecule-based bulk heterojunction (BHJ) organic solar cell devices is investigated. By measuring charge carrier mobilities as well as the morphology and crystallinity of each device we have been able to understand and explain the differences found between solar ce...

Perfluorophenyl functionalities have been introduced as side chain substituents onto regioregular poly(3-hexyl thiophene) (rr-P3HT), under various percentages. These functional groups were then converted to azides which were used to create polymeric hybrid materials with fullerene species, either C60 or C70. The P3HT–fullerene hybrids thus formed were thereafter evaluated as potential compatibi...

Addition of benzyne to C70 results in four isomeric monoadducts (compounds 1a-d) in a 42:35: 13:10 ratio as determined by 1H NMR. These compounds were separated by repeated passes through HPLC columns. The major isomer (1a) resulted from addition to the highly pyramidalized C1-C2 bond as shown by 13C NMR and UV/vis spectroscopy. The structure of the C1-C2 adduct (1a) was confirmed by X-ray crys...

Optical glasses doped with a fullerene mixture of C60/C70 were made in our lab. Three peaks, corresponding to C60 , C70 , and a modified fullerene ~possibly its oxide!, respectively, were found in the chromatogram of high performance liquid chromatography ~HPLC! analysis of the 0.1-wt % fullerene doped phosphate glass. Depending on the doping procedure and impurity, weak to strong interacting b...

Organic solar cells with a high degree of thermal stability require bulk-heterojunction blends that feature a high glass transition, which must occur considerably above the temperatures encountered during device fabrication and operation. Here, we demonstrate for the first time a polymer : fullerene blend with a glass transition temperature above 200 C, which we determine by plasmonic nanospect...