Hong You-Lee, Miyoshi Toshikazu
Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States.
ACS Macro Lett. 2013 Jun 18;2(6):501-505. doi: 10.1021/mz300630j. Epub 2013 May 24.
A unique approach using C-C double quantum (DQ) NMR combined with selective C isotope labeling is proposed to investigate the chain trajectory of the synthetic polymer in bulk crystals. Since the DQ buildup curve highly depends upon coupled spin number, topology, and internuclear distance, which originated from the chain trajectory of selectively C-labeled polymers, the adjacent re-entry site and fraction under finite chain-folding number can be determined.
提出了一种独特的方法，即使用碳-碳双量子（DQ）核磁共振结合选择性碳同位素标记来研究本体晶体中合成聚合物的链轨迹。由于DQ积累曲线高度依赖于耦合自旋数、拓扑结构和核间距，而这些又源于选择性碳标记聚合物的链轨迹，因此可以确定相邻的再进入位点和有限链折叠数下的分数。
