Advanced Materials

Cover image for Vol. 28 Issue 45

23_16i/2011Cyclodextrins: Highly Polarized Emission from Oriented Films Incorporating Water-Soluble Conjugated Polymers in a Polyvinyl Alcohol Matrix (Adv. Mater. 16/2011)

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 significant because rotaxination affords enhanced properties, such as increased PL efficiency, larger gain bands, suppressed polaron formation, and reduced exciton migration.

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