14Cellular Biology, University of Leeds, LS2 9JT, UK Electrospray ion mobility-mass spectrometry (IM-MS) data show that for some small 21 molecules, two (or even more) ions with identical sum formula and mass, but distinct drift 22

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We report electroluminescence of electroluminescent devices fabricated from cis,trans- 2,5-dimethoxy-1,4 -bis[2-(3,4,5-trimethoxyphenyl)ethenyl]benzene blended in a polystyrene matrix as emission layer. This choice of materials avoids the inherently poor miscibility of polymers with other compounds and minimizes interactions between the host polymer and the electro-optically active guest, which can produce quenching sites. A blue light-emitting device with high internal quantum efficiency (∼1%) results.

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