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학술대회자료
저자정보
Sectnan, Vegard H. (Department of chemistry, School of science, Kwansei-Gakuin University) Sasic, Slobodan (Department of chemistry, School of science, Kwansei-Gakuin University) Isaksson, Tomas (Department of chemistry, School of science, Kwansei-Gakuin University) Ozaki, Yukihiro (Department of Food Science, Agricultural University of Norway)
저널정보
한국근적외분광분석학회 한국근적외분광분석학회 학술발표회 한국근적외분광분석학회 2001년도 NIR-2001
발행연도
2001.1
수록면
1,287 - 1,287 (1page)

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The structure of water molecules in the pure liquid state has been subjected to extensive research for several decades. Questions still remain unanswered, however, and no single model has been found capable of explaining all the anomalies of water. In the present study near-infrared spectra of water in the temperature region 6-$80^{\circ}C$ have been analysed by use of principal component analysis (PCA) and two-dimensional correlation spectroscopy in order to study the dynamic behaviour of the water band centred at 1440 nm, which is due to the combination of symmetric and antisymmetric O-H stretching modes. It has been found that the wavelengths 1412 and 1491 nm account for more than 99% of the spectral variation, representing two major water species with weaker and stronger hydrogen bonds, respectively. A third species located at 1438 nm, whose concentration was relatively constant as a function of temperature, is also indicated. A somewhat distorted two-state structural model for water is suggested.

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