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C60 Derivative (c60 + derivative)
Selected AbstractsChemInform Abstract: Regioselectivity in Radical Reactions of C60 Derivatives.CHEMINFORM, Issue 36 2001Benoit de La Vaissiere Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Di- and Dodeca-Mitsunobu Reactions on C60 Derivatives: Post-Functionalization of Fullerene Mono- and Hexakis-AdductsCHEMISTRY - A EUROPEAN JOURNAL, Issue 43 2009Philippe Pierrat Dr. Fullerene derivatives: The Mitsunobu reaction was applied to the post-functionalization of mono- and hexakis-methanofullerenes (see figure). This novel approach can be used in combination with other fullerene derivatizations and thus allows easy access to new structures. [source] Developmental toxicity in zebrafish (Danio rerio) embryos after exposure to manufactured nanomaterials: Buckminsterfullerene aggregates (nC60) and fullerolENVIRONMENTAL TOXICOLOGY & CHEMISTRY, Issue 5 2007Xiaoshan Zhu Abstract The present paper summarizes, to our knowledge, the first study regarding the developmental toxicity of stable buck-minsterfullerene aggregates suspended in water (nC60) using zebrafish (Danio rerio) as a vertebrate model. Zebrafish embryo survival, hatching rate, heartbeat, and pericardial edema were noted and described within 96 h of exposure. Fullerol (a hydroxylated C60 derivative, C60(OH)16,18) at 50 mg/L did not exert toxicity to zebrafish embryos. In contrast, nC60 at 1.5 mg/L delayed zebrafish embryo and larval development, decreased survival and hatching rates, and caused pericardial edema. Toxicity was mitigated by adding an antioxidant (glutathione), which suggests that a free radical,induced mechanism or another form of oxidative stress played a role in developmental toxicity. [source] Fabrication, Optical Modeling, and Color Characterization of Semitransparent Bulk-Heterojunction Organic Solar Cells in an Inverted StructureADVANCED FUNCTIONAL MATERIALS, Issue 10 2010Tayebeh Ameri Abstract Semitransparent inverted organic photodiodes are fabricated with a Baytron PH500 ethylene-glycol layer/silver grid as the top electrode. Reasonable performances are obtained under both rear- and front-side illumination and efficiencies up to 2% are achieved. Some light is shed on visual prospects through optical simulations for a semitransparent device of poly(3-hexylthiophene) (P3HT) and the C60 derivative 1-(3-methoxycarbonyl)propyl-1-phenyl[6,6]C71 (PC70BM) in the inverted structure. These calculations allow the maximum efficiency achievable to be predicted for semitransparent cells based on P3HT:PC70BM versus the transparency perception for a human eye. The simulations suggest that low-bandgap materials such as poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b,]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) have a better potential for semitransparent devices. In addition, the color range recognized by the human eye is predicted by the optical simulation for some semitransparent devices including different active layers. [source] High-Performance Polymer Solar Cells of an Alternating Polyfluorene Copolymer and a Fullerene Derivative,ADVANCED MATERIALS, Issue 12 2003M. Svensson Solar cells prepared using the alternating copolymer shown in the Figure blended with a C60 derivative (PCBM) are demonstrated to have a high performance, with a power conversion efficiency of 2.2,% under simulated solar light. The molecular weight of the polymer is low due to limited solubility, and films of the polymer exhibit red-shifted absorption. [source] Comparison between the Photophysical Properties of Pyrazolo- and Isoxazolo[60]fullerenes with Dual Donors (Ferrocene, Aniline and Alkoxyphenyl)EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 13 2007Laura Perez Abstract Two series of new pyrazolo- and isoxazolo[60]fullerenes covalently linked to vinylenephenylene bearing ferrocene, dibutylaniline or dodecyloxyphenyl electron-donor groups attached in the periphery have been synthesized. The photophysical properties of these newly synthesized dual-donor,C60 derivatives have been investigated and compared by applying time-resolved fluorescence and nanosecond transient techniques in both polar and nonpolar solvents. Charge separation via the excited singlet state of C60 is more efficient in the pyrazolo-C60 triads than in the isoxazolo-C60 triads. It was found that the pyrazoline ring mediates charge separation as a result of the stronger electron-donating character of the nitrogen atom of the pyrazoline ring compared with the oxygen atom of the isoxazoline ring. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source] Electropolymerizable Terthiophene S,S -Dioxide-Fullerene Diels-Alder Adduct for Donor/Acceptor Double-Cable PolymersMACROMOLECULAR RAPID COMMUNICATIONS, Issue 12 2007Yolanda Vida Abstract The preparation of a novel fullerene-thiophene derivative by Diels-Alder addition of terthiophene S,S -dioxide was demonstrated. Extrusion of SO2 from the adduct is an effective process that yields a stable cyclohexadiene-1,4-bisthiophene,C60 adduct in good isolable yield. The product has been accurately characterized and opens the way to synthesize new C60 derivatives "via" Diels-Alder methodology without the possibility of cycloreversion. Electrochemical and spectroscopic properties of this macromolecule were studied and supported by theoretical calculations to interpret its electronic structure. The first approach to the electropolymerization of this macromonomer produces donor-acceptor molecular wires providing a new and versatile way to fullerene-based double cable polymers. [source] N -Unsubstituted and N -Arylated Fulleropyrrolidines: New Useful Building Blocks for C60 Functionalization,CHINESE JOURNAL OF CHEMISTRY, Issue 9 2006Chen-Hua Tong Abstract Two series of stable and soluble fulleropyrrolidines have been prepared from the reactions of C60, glycine or its N -arylated derivatives and aliphatic aldehydes or ketones in refluxing toluene or chlorobenzene. The new C60 derivatives represent new useful building blocks for further preparation of more funcionalized C60 derivatives. [source] | ||||||||||||||||||||||