Intermolecular carbon nanotube junctions were formed through amide linkage of amino functionalized multiwall carbon nanotubes and [Ru (dcbpy)(bpy)2](PF6)2, an inorganic metal complex. Nanotube interconnects were visualized using atomic force microscopy. Absorption and emission spectroscopy showed significant changes between starting products and the resulting ruthenium nanotube complex, indicative of successful chemical modification.
We have synthesized and investigated the electronic properties of poly[2-(2‘-ethylhexyloxy)-5-phenyl-1,4-phenylenevinylene], 12, and its methylsulfonyl derivative poly[2-(2‘-ethylhexyloxy)-5-(4‘ ‘-methylsulfonylphenyl)-1,4-phenylenevinylene], 13. Polymer 13 contains a second-order nonlinear optic
chromophore which is in conjugation with the polymer backbone. Polymers 12 and 13 have been used as
the electroluminescent (EL) layers in single layer light-emitting diodes (LEDs) (ITO/polymer/Al). We have
found that when 12 was used, the LEDs had an external EL quantum efficiency of 0.01%. Attachment of
the methylsulfonyl moiety to 12 to give 13 in an attempt to increase the electron affinity of the parent
polymer was found to make no difference to the efficiency of the single layer EL devices and appeared
qualitatively to reduce their lifetimes.
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