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Proceedings Paper

Changes in electronic states of molecules resulted from interactions in the condensed phase
Author(s): Yusuke Morisawa; Nami Ueno; Shin Tachibana; Masahiro Ehara; Yukihiro Ozaki
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Paper Abstract

The wavelength region shorter than 200 nm, far-ultraviolet (FUV) region, is very rich in information about the electronic states and structure of a molecule. We have recently developed a totally new UV spectrometer based on attenuated total reflection (ATR) that enables us to measure spectra of liquid and solid samples in the 140–280 nm region. This paper shows the studies by the attenuated total reflection far-ultraviolet (ATR-FUV) spectroscopy. Intermolecular interactions between alkyl chains such as CH---HC should be reflected in the phase behavior of organic compounds. We measured the attenuated total reflectance spectra in the far-UV region (145–300 nm) of n-tetradecane (Tm = 5.9 °C) from 15 to -38 °C to determine its temperature dependency. With decreasing temperature, the absorption band at 153 nm in the liquid phase becomes weaker and new bands appear at around 200 and 230 nm. These results suggest that an unusually compressed structure might be generated at the surface at low temperatures, and this phase change, which is reversible, is responsible for the unusual absorption observed in the ATR-FUV spectra. We have also investigated composite polymer electrolytes (CPE). ATR-FUV spectra of CPEs composed of Poly(ethylene oxide) (PEO) and Li salt were observed and its variation of anions for the CPEs are studied.

Paper Details

Date Published: 29 August 2017
PDF: 6 pages
Proc. SPIE 10351, UV and Higher Energy Photonics: From Materials to Applications 2017, 103510G (29 August 2017);
Show Author Affiliations
Yusuke Morisawa, Kindai Univ. (Japan)
Nami Ueno, Kindai Univ. (Japan)
Shin Tachibana, Kwansei Gakuin Univ. (Japan)
Masahiro Ehara, Institute for Molecular Science (Japan)
Yukihiro Ozaki, Kwansei Gakuin Univ. (Japan)

Published in SPIE Proceedings Vol. 10351:
UV and Higher Energy Photonics: From Materials to Applications 2017
Gilles Lérondel; Satoshi Kawata; Yong-Hoon Cho, Editor(s)

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