Polyoxometalate (POM) H₃PMo₁₂O₄₀ was coassembled with stimuli-responsive triblock copolymer poly(ethylene oxide)-block-polystyrene-block-poly(2-(dimethylamino)ethyl methacrylate) (PEO-b-PS-b-PDMAEMA) by electrostatic interactions. Depending on the POM contents, the hybrid complexes can self-assemble into a series of morphologies: micelles, rods, toroids, and vesicles. Unlike traditional morphology transition of amphiphilic block copolymer derived from a broad range of hydrophobic volume fractions, POM-induced morphology transitions just occurred in a narrow range of volume fractions. The length of rod micelles exponentially decreased with solvent compositions (tetrahydrofuran/H₂O). The hybrid assemblies showed acid–base responsibility due to the PDMAEMA block. Rod micelles could further assemble and disassemble reversibly upon adding acid/base. Fluorescent polyoxometalate Na₉EuW₁₀O₃₆ was also complexed with PEO-b-PS-b-PDMAEMA to prepare fluorescent vesicles. The vesicles showed off–on switchable fluorescence behavior accompanied with reversible vesicle-to-micelle transformation in response to pH stimuli.

中文翻译：

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多金属氧酸盐调节的刺激响应性三嵌段共聚物的形态演变

多金属氧酸盐（POM）H ₃ PMO ₁₂ ö ₄₀与刺激响应三嵌段共聚物的聚（环氧乙烷）coassembled -块-polystyrene-块-聚（2-（二甲基氨基）乙基甲基丙烯酸酯）（PEO- b -PS- b-PDMAEMA）。取决于POM的含量，杂化复合物可以自组装成一系列形态：胶束，棒，环面和囊泡。与衍生自宽范围的疏水体积分数的两亲嵌段共聚物的传统形态转变不同，POM诱导的形态转变仅发生在窄范围的体积分数中。棒状胶束的长度随溶剂组成（四氢呋喃/ H ₂ O）呈指数下降。由于PDMAEMA嵌段，混合组件表现出酸碱作用。棒状胶束在添加酸/碱后可进一步可逆地组装和分解。荧光多金属氧酸盐Na ₉ EuW ₁₀ O ₃₆也与PEO-b -PS- b -PDMAEMA制备荧光囊泡。囊泡表现出可关闭的可切换荧光行为，并伴随着对pH刺激的可逆囊泡向胶束转化。