Salt-induced aggregation of polyelectrolyte-amphiphilic dendron complexes in THF solutions.
Salt-induced aggregation of polyelectrolyte-amphiphilic dendron complexes in THF solutions.
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DOI：
10.1021/la803840a
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发表时间：
2009-01
期刊：
影响因子：
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通讯作者：
Xinjun Zhang;Yongliang Wang;Wei Wang;S. Bolisetty;Yan Lu;M. Ballauff
中科院分区：
文献类型：
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作者：
Xinjun Zhang;Yongliang Wang;Wei Wang;S. Bolisetty;Yan Lu;M. Ballauff
通过离子相互作用将两亲性树突（第一代、第二代和第三代）与带相反电荷的聚电解质络合而成。它们的化学结构可以通过核磁共振光谱（1H NMR）、傅里叶变换红外光谱（FT-IR）和元素分析（EA）来证实。对所有配合物的聚集行为进行了研究。在THF中加入盐的诱导下，它们表现出有趣的自组装行为，根据盐的量形成胶束和囊泡。这些自组装体的形成已经被动态光散射（DLS）、静态光散射（SLS）、电子显微镜（EM）以及原子力显微镜（AFM）所证实。稀释实验表明，所形成的囊泡具有良好的抗稀释稳定性和多电解质行为。本文描述的胶束和囊泡聚集体的形成可能是基于熵效应和盐添加引起的构建块的形状变化。
Complexes were prepared by complexing amphiphilic dendrons (first, second, and third generations) with an oppositely charged polyelectrolyte through ionic interaction. Their chemical structure can be confirmed by nuclear magnetic resonance spectroscopy (1H NMR), Fourier transform infrared spectroscopy (FT-IR), and elemental analysis (EA). All of the complexes were investigated with respect to their aggregation behavior. Under the inducement of salt addition in THF, they showed interesting self-assembly behavior, forming micelles and vesicles depending on the amount of the salt. The formation of these self-assemblies has been proven by dynamic light scattering (DLS), static light scattering (SLS), and electron microscopy (EM) as well as atomic force microscopy (AFM). Dilution experiments showed that the formed vesicles have good stability against dilution as well as polyelectrolyte behavior. The formation of micelle and vesicle aggregates described in this article is probably based on the entropy effect and the shape transformation of building blocks caused by salt addition.