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Highly oriented luminescent films are produced by stretching a 30‐μm‐thick polyvinyl alcohol matrix doped with water‐soluble polyrotaxanes and their unthreaded analogues. Photoluminescence experiments reveal that over 95% of the emitted light is polarized along the orientation direction. A hybrid organic–inorganic light‐emitting diode is built to investigate the possibility of using these films as...
Water‐soluble conjugated polymers reach high degrees of alignment in stretched polyvinyl alcohol matrices, either when encapsulated by threading into cyclodextrins to form a polyrotaxane (polarization ratio, PR∼50), or unencapsulated (PR∼110), report Franco Cacialli and co‐workers on p. 1855. This is remarkable because cyclodextrin encapsulation might have been expected to prevent alignment, and is...
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