Matière Molle et Chimie (UMR 7167 ESPCI-CNRS), Ecole Supérieure de Physique et Chimie Industrielles de la Ville de Paris (ESPCI ParisTech), 10 rue Vauquelin, 75005 Paris, France.
J Am Chem Soc. 2012 Feb 29;134(8):3671-4. doi: 10.1021/ja2119496. Epub 2012 Feb 16.
We show here that complementary interactions can suppress mesoscopic order and thus lead to a counterintuitive change in material properties. We present results for telechelic supramolecular polymers based on poly(propylene oxide) (PPO), thymine (Thy), and diaminotriazine (DAT). The self-complementary systems based on Thy exhibit lamellar order and 2D crystallization of Thy in the bulk. We show that the microphase segregation is inhibited by addition of DAT: the strong complementary Thy-DAT interaction inhibits crystallization of thymine in microdomains and lamellar structuration. As a result, the supramolecular polymer with only weakly self-complementary stickers is a solid, whereas the supramolecular polymer with strongly complementary stickers is a liquid.
我们在这里展示了互补相互作用可以抑制介观有序，从而导致材料性质的反直觉变化。我们介绍了基于聚（环氧丙烷）（PPO）、胸腺嘧啶（Thy）和二氨基三嗪（DAT）的端基超分子聚合物的结果。基于 Thy 的自互补系统表现出层状有序和本体中 Thy 的 2D 结晶。我们表明，通过添加 DAT 可以抑制微相分离：强互补 Thy-DAT 相互作用抑制了胸腺嘧啶在微区和层状结构中的结晶。结果，只有弱自互补胶的超分子聚合物是固体，而具有强互补胶的超分子聚合物是液体。
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