Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
J Phys Chem B. 2011 Feb 24;115(7):1693-7. doi: 10.1021/jp107099z. Epub 2011 Feb 2.
Investigation on compaction and decompaction of polymers is very important since it is a fundamental problem in polymer physics. With the aids of atomic force microscope (AFM) and dynamic light scattering (DLS) measurements in this contribution, the temperature-dependent compaction/decompaction transition process of water-soluble cationic polythiophene (PT) was investigated in the presence of KI. The above process is characterized by the red-to-yellow color change and fluorescence recovery and is reversible during the heating-cooling cycles in the range from 25 to 55 °C, indicating that the compaction and decompaction of polymer can be employed as a temperature indicator.
聚合物的压实和解实非常重要，因为这是聚合物物理中的一个基本问题。在本研究中，借助原子力显微镜（AFM）和动态光散射（DLS）测量，研究了在 KI 存在下，水溶性阳离子聚噻吩（PT）的温度依赖性压实/解实转变过程。上述过程的特征是颜色从红色变为黄色，荧光恢复，并且在 25 至 55°C 的加热-冷却循环过程中是可逆的，表明聚合物的压实和解实可以用作温度指示剂。
