Retrocyclopropanation Reactions of Fullerenes: Complete Product Analyses
作者:M. Ángeles Herranz、Charles T. Cox、Luis Echegoyen
DOI:10.1021/jo034102u
日期:2003.6.1
Mono- and bis-pyrene malonates 1 and 2 were synthesized and reacted with C-60 to prepare the corresponding Bingel adducts 3 and 4. These compounds were characterized electrochemically and exhibited the well-established retrocyclopropanation reaction when subjected to bulk electrolytic reductions. For the first time, it was possible to perform detailed product analyses after the retrocyclopropanation reactions, and these showed the presence of the original malonates 1 and 2 along with C60, in reasonable yields, around 50%.
Design and synthesis of multi-component 18π annulenic fluorofullerene ensembles suitable for donor–acceptor applications
作者:Glenn A. Burley、Anthony G. Avent、Ilya V. Gol’dt、Peter B. Hitchcock、Hamad Al-Matar、Demis Paolucci、Francesco Paolucci、Patrick W. Fowler、Alessandro Soncini、Joan M. Street、Roger Taylor
DOI:10.1039/b309959h
日期:——
A series of trannulene (all-trans annulene) derivatives of [60]fullerene have been prepared by reacting C60F18 with methanetricarboxylate esters that incorporate a range of photoactive functions. All the compounds have the intense emerald-green colour of fullerene trannulenes, characterised by strong bands at ca. 612 and 667 nm. Single crystal X-ray studies show that the packing varies with the nature of the addend, attributable to differing steric effects. UV/vis absorption spectra display transitions of the respective fullerene and addend models, indicating absence of electronic interactions between them in the ground state. These now provide an extensive series for testing photoactive (light-harvesting) properties, with the exceptional properties of having strong visible light absorption. Their exceptional stability is attributed to the 18Ï aromatic circuit, inability to undergo nucleophilic substitution without disrupting this circuit, and a curved cage region that is shielded to reagents by the three bulky addends.
Mono- and Di-Pyrene [60]Fullerene and [70]Fullerene Derivatives as Potential Components for Photovoltaic Devices
作者:Piotr Piotrowski、Wojciech Mech、Kamila Zarębska、Maciej Krajewski、Krzysztof P. Korona、Maria Kamińska、Magdalena Skompska、Andrzej Kaim
DOI:10.3390/molecules26061561
日期:——
molecular structures at the DFT/B3LYP/6-31G(d) level. Efficiency of solar cells made of PTB7: C60 and C70 fullerene pyrenederivatives were analyzed based on the determined energy levels of the HOMO and LUMO orbitals of the derivatives as well as the extensive spectral results of fullerene derivatives and their mixtures with PTB7. As a result, we found that the electronic and spectral properties, on which the