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Jesús del Barrio, Eva Blasco, Luis Oriol, Rafael Alcalá and Carlos Sánchez-Somolinos Diblock copolymer–azobenzene complexes through hydrogen bonding: Self-assembly and stable photoinduced optical anisotropy Journal of Polymer Science Part A: Polymer Chemistry 51

Article first published online: 5 JAN 2013 | DOI: 10.1002/pola.26523

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The preparation of a series of photoaddressable supramolecular block copolymers is demonstrated by mixing a carboxy-terminated azobenzene derivative, AZO, and two PS-b-P4VP block copolymers. Homogeneous liquid crystalline materials were obtained for ratios of AZO to vinylpyridine repeating unit, x, lower or equal to 0.50. Mixtures with higher x resulted in heterogeneous materials showing clear macrophase separation. Photoinduced orientation of the azobenzene units was obtained in films of PS-b-P4VP(AZO)x with x = 0.25 and 0.50.

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