Shao-hua Zhang, Yang Chen, Heng Li, Yu-xiang Weng. Transitional Process of Ploy(N-isopropylacrylamide) in Deuterated Solution[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 447-452. doi: 10.1088/1674-0068/22/05/447-452
Citation: Shao-hua Zhang, Yang Chen, Heng Li, Yu-xiang Weng. Transitional Process of Ploy(N-isopropylacrylamide) in Deuterated Solution[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 447-452. doi: 10.1088/1674-0068/22/05/447-452

Transitional Process of Ploy(N-isopropylacrylamide) in Deuterated Solution

doi: 10.1088/1674-0068/22/05/447-452
Funds:  This work was supported by the National Natural Science Foundation of China (No.20673107), theNational Key Basic Research Special Foundation of China (No.2007CB815203), and the Knowledge Inno-vation Foundation of the Chinese Academy of Science (No.KJCX2-SW-H08).
  • Received Date: 2009-06-11
  • The fast phase-transitional process of ploy(N-isopropylacrylamide) (PNIPAM) in deuterated solution was studied by laser induced temperature jump technique combined with time-resolved mid-infrared absorbance difference spectroscopy on nanosecond level. The multi-peaks of amide I0 band of PNIPAM among the energy range of 1565-1700 cm-1 was experimentally resolved to three groups (i, ii, iii) for the first time, while the distinct three-stage procedure in the phase transitional process of long-chain PNIPAM was observed firstly too. Furthermore, proper assignments were also made for the three group peaks in amide I′band and the three steps in the kinetics process of long-chain PNIPAM.
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Transitional Process of Ploy(N-isopropylacrylamide) in Deuterated Solution

doi: 10.1088/1674-0068/22/05/447-452
Funds:  This work was supported by the National Natural Science Foundation of China (No.20673107), theNational Key Basic Research Special Foundation of China (No.2007CB815203), and the Knowledge Inno-vation Foundation of the Chinese Academy of Science (No.KJCX2-SW-H08).

Abstract: The fast phase-transitional process of ploy(N-isopropylacrylamide) (PNIPAM) in deuterated solution was studied by laser induced temperature jump technique combined with time-resolved mid-infrared absorbance difference spectroscopy on nanosecond level. The multi-peaks of amide I0 band of PNIPAM among the energy range of 1565-1700 cm-1 was experimentally resolved to three groups (i, ii, iii) for the first time, while the distinct three-stage procedure in the phase transitional process of long-chain PNIPAM was observed firstly too. Furthermore, proper assignments were also made for the three group peaks in amide I′band and the three steps in the kinetics process of long-chain PNIPAM.

Shao-hua Zhang, Yang Chen, Heng Li, Yu-xiang Weng. Transitional Process of Ploy(N-isopropylacrylamide) in Deuterated Solution[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 447-452. doi: 10.1088/1674-0068/22/05/447-452
Citation: Shao-hua Zhang, Yang Chen, Heng Li, Yu-xiang Weng. Transitional Process of Ploy(N-isopropylacrylamide) in Deuterated Solution[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 447-452. doi: 10.1088/1674-0068/22/05/447-452

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