14098-44-3. Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 14098-44-3, Name is Benzo-15-crown-5,introducing its new discovery.
Role of Polymer Structure on the Conductivity of N-Doped Polymers
The n-doping of several conjugated co-polymers based on perylene diimide (PDI) and napthalene diimide (NDI) acceptors co-polymerized with ethynylene, ethylene, and bithiophene by the dimeric dopant (2-Cyc-DMBI)2 is reported. The n-doping reactions are confirmed in solution by UV?Vis?NIR spectroscopy and in thin films with photothermal deflection spectroscopy (PDS). The reduced species of the ethynylene-linked polymers are found to be more delocalized along the polymer backbone than the bithiophene-linked polymers by comparison of the absorption spectra. A high conductivity of 0.45 S cm?1 is measured for the ethynylene-linked polymer P(PDI2OD-A). In contrast, neither of the two bithiophene-linked polymers, P(NDI2OD-T2) and P(PDI2OD-T2), achieve conductivities greater than 4 ¡Á 10?3 S cm?1. Furthermore, there is no correlation between the conductivity of the doped films and the mobility of the pure films used in this study. Grazing incidence X-ray diffraction (GIXD) measurements of the films find that a similar doped phase forms irrespective of the crystallinity of the pure host polymer. In absence of a significant difference in morphology, these results suggest a link between the polaron delocalization length of the polymers and the conductivity, and more fundamentally between the backbone structure of the polymer and the polaron delocalization length.
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Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare