| 荧光标记的聚(N-异丙基丙烯酰胺)链在水溶液中的折叠动力学 |
| |
| 引用本文： | 李春亮,叶晓东,丁延伟,刘世林.荧光标记的聚(N-异丙基丙烯酰胺)链在水溶液中的折叠动力学[J].化学物理学报,2012,25(4):389-397. |
| |
| 作者姓名： | 李春亮 叶晓东 丁延伟 刘世林 |
| |
| 作者单位： | 中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室(筹)，理化科学实验中心，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026 |
| |
| 摘 要： | 使用1.54 μm的激光脉冲(脉宽约10 ns)诱导丹磺酰基标记的热敏性线性聚N-异丙基丙烯酰胺(PNIPAM)发生线团到小球的转变．当聚合物链中NIPAM单体与丹磺酰基基团的摩尔比由110增至300时，共价键合到聚合物主链上的丹磺酰基发色团对PNIPAM相转变行为的影响会随之减小．PNIPAM链塌缩经历成核过程(伴随着初始珍珠的形成，快弛豫时间τfast=0.1 ms)和珍珠的增长粗化阶段(慢弛豫时间τslow=0.5 ms)，这与之前使用水溶性的1-苯胺-8-萘磺酸铵盐作为荧光探针研究PNIPAM在水溶液中的折叠动力学得到的结果类似．τfast在很宽的分子量范围内都与分子量无关，而τslow则随链长增加而略有增大．
|
| 关 键 词： | 荧光标记，激光光散射，相转变，刺激响应性聚合物 |
| 收稿时间： | 2012/5/18 0:00:00 |
Kinetics of Coil-to-Globule Transition of Dansyl-Labeled Poly(N-isopropyl-acrylamide) Chains in Aqueous Solution |
| |
| Chun-liang Li,Xiao-dong Ye,Yan-wei Ding and Shi-lin Liu.Kinetics of Coil-to-Globule Transition of Dansyl-Labeled Poly(N-isopropyl-acrylamide) Chains in Aqueous Solution[J].Chinese Journal of Chemical Physics,2012,25(4):389-397. |
| |
| Authors: | Chun-liang Li Xiao-dong Ye Yan-wei Ding and Shi-lin Liu |
| |
| Institution: | Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China |
| |
| Abstract: | |
| |
| Keywords: | Fluorescence labeling Laser light scattering Phase transition Stimuli-sensitive polymer |
|
| 点击此处可从《化学物理学报》浏览原始摘要信息 |
| 点击此处可从《化学物理学报》下载免费的PDF全文 |
|
