期刊
CHEMICAL PHYSICS LETTERS
卷 728, 期 -, 页码 32-36出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2019.04.068
关键词
Infrared spectroscopy; Vibrational Stark effect; Nylon 6; beta-sheet; Amide I
资金
- Waseda University [2018K-269]
Infrared Stark spectra for a Nylon 6 film were measured under electric fields from 0.99 to 1.5 MV/cm at 77 K using a sandwich-type cell with a BaF2/Al/Nylon 6/Al structure. The broad asymmetric infrared and Stark spectra observed for amide I (C=O stretch) were fitted with three components: 1637-cm(-1) band (beta-sheet structure), 1645- and 1663-cm(-1) bands (disordered hydrogen-bonded structures). The change in the dipole moment Delta mu between the ground and first excited vibrational states for amide I (beta-sheet structure) was determined to be 0.064 Df(-1), where f is a local field correction factor.
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