Direct observation of the absorption bands of the first electronic transition in liquid H2O and D2O by attenuated total reflectance far-UV spectroscopy

Direct observation of the absorption bands of the first electronic transition in liquid H2O and D2O by attenuated total reflectance far-UV spectroscopy

Absorption bands of the first electronic transition (X (1)A(1)-->A (1)B(1)) of water (H(2)O) and heavy water (D(2)O) in the liquid state have been directly observed by using a uniquely designed attenuated total reflectance far-ultraviolet (ATR-FUV) spectrometer. Since the ATR geometry reduces the...

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Veröffentlicht in:The Journal of chemical physics 2008-12, Vol.129 (23), p.234510-234510
Hauptverfasser: Ikehata, Akifumi, Higashi, Noboru, Ozaki, Yukihiro
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container_title The Journal of chemical physics
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creator Ikehata, Akifumi
Higashi, Noboru
Ozaki, Yukihiro
description Absorption bands of the first electronic transition (X (1)A(1)-->A (1)B(1)) of water (H(2)O) and heavy water (D(2)O) in the liquid state have been directly observed by using a uniquely designed attenuated total reflectance far-ultraviolet (ATR-FUV) spectrometer. Since the ATR geometry reduces the absorbance, the FUV spectra can be obtained over the entire X (1)A(1)-->A (1)B(1) absorption band, including the band maxima. Systematic measurements of the FUV spectra of H(2)O and D(2)O with heating from 10 to 70 degrees C and the analysis of Kramers-Kronig transformation reveal that the first electronic transition band redshifted on heating. This result is in good agreement with the redshift that has been frequently observed in the low-energy band tail of the X (1)A(1)-->A (1)B(1) absorption band.
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title Direct observation of the absorption bands of the first electronic transition in liquid H2O and D2O by attenuated total reflectance far-UV spectroscopy
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