在组装的共晶体中,diodobutadiyne的压力诱导聚合
Christopher Wilhelm1, Stephen A Boyd, Samrat Chawda
1Department of Chemistry, State University of New York, Stony Brook, New York 11794-3400, USA.
高压诱导了在共晶体内diodobutadiyne的拓化学聚合,形成了有序合聚合物poly ((diiododiacetylene) (PIDA). 这种压力诱导的聚合法克服了以前热或辐射方法的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 与bis(pyridyl) oxalamides一起的Dio-butadiyne共晶体显示出近乎理想的diyne对齐,用于拓化学聚合.
- 以前试图使用热或辐射聚合这些共晶的尝试没有成功.
研究的目的:
- 为了在共晶体中实现diodobutadiyne的有序聚合.
- 为了研究高外部压力对diodobutadiyne的高化学聚合物的影响.
主要方法:
- 在高外部压力 (0.3-10 GPa) 下对迪奥多布塔迪因共晶体施加.
- 利用X射线衍射,拉曼光谱和固态NMR来分析样品.
- 执行密度函数理论计算 (B3LYP/LanL2DZ).
主要成果:
- 聚合发生在高压下,由颜色变化表明,从无色变为蓝色在较低的压力和黑色在较高的压力下.
- 在较低的压力下,X射线衍射证实了单体的存在,而固态NMR和拉曼光谱在较高的压力下表明了聚合物形成.
- 典型的拉曼峰 (962,1394,2055厘米-1) 和DFT计算证实了聚乙烯的形成.
结论:
- 高外部压力是一种有效的方法,用于诱导在共晶体中的二二多巴丁胺的高化学聚合.
- 压力诱导的聚合产生了有序结合聚合物,聚二二乙烯 (PIDA).
- 这项研究展示了一种新的合成有序聚合物的途径,这些聚合物以前很难形成.
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