Formation of the Inclusion Complex of Helical Syndiotactic Poly(methyl methacrylate) and Polycyclic Aromatic Hydrocarbons
Formation of the Inclusion Complex of Helical Syndiotactic Poly(methyl methacrylate) and Polycyclic Aromatic Hydrocarbons
复制标题
DOI：
10.1021/ma200255m
复制
发表时间：
2011-04
期刊：
影响因子：
5.5
通讯作者：
T. Kawauchi;M. Kawauchi;Y. Kodama;T. Takeichi
中科院分区：
文献类型：
--
作者：
T. Kawauchi;M. Kawauchi;Y. Kodama;T. Takeichi
我们发现，多环芳烃（PAHs），如芘和菲可以封装在一个间规聚（甲基丙烯酸甲酯）（st-PMMA）的螺旋腔，导致形成一个结晶包合物。将苯乙烯-聚甲基丙烯酸甲酯（st-PMMA）凝胶在芘甲苯溶液中真空干燥12 h和160 °C干燥1 h，制得苯乙烯-聚甲基丙烯酸甲酯（st-PMMA）-芘包合物（st-PMMA/pyrene）。含有19wt%芘的st-PMMA/芘包合物在其X射线衍射图中显示出特征反射图案，并且在差示扫描量热法实验中显示出184.4 °C的熔点。基于芘含量的包合物的分子建模表明，封装的芘分子紧密排列在st-PMMA螺旋。结果表明，芘的含量为10%时，由于芘的激基缔合物的形成，st-PMMA/芘包合物膜具有荧光发射，支持了一维荧光的推断。
We found that polycyclic aromatic hydrocarbons (PAHs) such as pyrene and phenanthrene can be encapsulated in a syndiotactic poly(methyl methacrylate) (st-PMMA) helical cavity, leading to the formation of a crystalline inclusion complex. The inclusion complex of st-PMMA and pyrene (st-PMMA/pyrene) was prepared from the st-PMMA gel formed in a toluene solution of pyrene by drying under vacuum at room temperature for 12 h and at 160 °C for 1 h. The st-PMMA/pyrene inclusion complex containing 19 wt % pyrene showed a characteristic reflection pattern in its X-ray diffractogram and a melting point of 184.4 °C in differential scanning calorimetry experiments. Molecular modeling of the inclusion complex based on the pyrene content indicated that the encapsulated pyrene molecules are closely aligned in the st-PMMA helix. The st-PMMA/pyrene inclusion complex film containing 10 wt % pyrene showed a fluorescence emission because of the formation of a pyrene excimer in the complex, supporting the inference of one-dime...