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(A) Chemical structures of complexes of poly(2-vinylpyridine) and 4’-[3,5-di(trideca-2,4-diynyloxyl)]azobenzene-4-sulfonic acid. Before UV irradiation at 254 nm, the azo group exists as a trans isomer. Upon irradiation, the cis isomer has a bent shape that perturbs the ordered structure of the membrane. (B) Cryo-TEM micrographs of the multilayer polymersomes before (left) and after (right) UV irradiation for 45 min. Adapted with permission.[147]
