The unfavorable D3h isomer of the C78 fullerene cage is present in Sc3N@C78, an endohedral fullerene which has been prepared by the trimetallic nitride template process. The crystal structure of the fullerene–porphyrin adduct Sc3N@C78⋅[Co(oep)]⋅1.5 C6H6⋅0.3 CHCl3 (oep=octaethylporphyrin) shows that the scandium atoms are located over the centers of the [6,6] ring junctions of pyracylene patches on the inner surface of the fullerene (see picture).

organization of 1 into a liquid-crystalline phase is that it allows the unprecedented control of the molecular orientation of 1 in thin solid films. Induced orientation of the liquidcrystalline domains of 1 under a shearing force results in highly anisotropically ordered thin solid films that serve as dichroic polarizers of light at long wavelengths (greater than 600 nm). Future work will investigate the fluorescence, semiconducting, and photoconducting properties of 1.

Articles you may be interested inSecond-harmonic spectroscopy of surface immobilized gold nanospheres above a gold surface supported by self-assembled monolayers J. Chem. Phys. 125, 174703 (2006) Imaging nanometer-thick patterned self-assembled monolayers via second-harmonic generation microscopy

organization of 1 into a liquid-crystalline phase is that it allows the unprecedented control of the molecular orientation of 1 in thin solid films. Induced orientation of the liquidcrystalline domains of 1 under a shearing force results in highly anisotropically ordered thin solid films that serve as dichroic polarizers of light at long wavelengths (greater than 600 nm). Future work will investigate the fluorescence, semiconducting, and photoconducting properties of 1.

Efficient polymer-fullerene photovoltaic devices require close proximity of the two materials to ensure photoexcited electron transfer from the semiconducting polymer to the fullerene acceptor. We describe studies in which a bilayer system consisting of spin-cast 2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene copolymer (MEH-PPV) and sublimed C60 is heated above the MEH-PPV glass transition temperature in an inert environment, inducing an interdiffusion of the polymer and the fullerene layers. With this process, a controlled, bulk, gradient heterojunction is created bringing the fullerene molecules within the exciton diffusion radius of the MEH-PPV throughout the film to achieve highly efficient charge separation. The interdiffused devices show a dramatic decrease in photoluminescence and concomitant increase in short circuit currents, demonstrating the improved interface.