Changes in the Electronic Transitions of Polyethylene Glycol upon the Formation of a Coordinate Bond with Li+, Studied by ATR Far-Ultraviolet Spectroscopy

2019 ◽  
Vol 123 (50) ◽  
pp. 10746-10756 ◽  
Author(s):  
Nami Ueno ◽  
Tomonari Wakabayashi ◽  
Harumi Sato ◽  
Yusuke Morisawa
Keyword(s):  
Polyethylene Glycol ◽  
Electronic Transitions ◽  
Ultraviolet Spectroscopy ◽  
Coordinate Bond ◽  
Far Ultraviolet

Far-ultraviolet spectroscopy of solid and liquid states: characteristics, instrumentation, and applications

The Analyst ◽  
2016 ◽  
Vol 141 (13) ◽  
pp. 3962-3981 ◽  
Author(s):  
Yukihiro Ozaki ◽  
Ichiro Tanabe
Keyword(s):  
Electronic Structures ◽  
Basic Science ◽  
Ultraviolet Spectroscopy ◽  
Far Ultraviolet ◽  
Liquid States ◽  
Almost All ◽  
Solid And Liquid States

Far-ultraviolet spectroscopy (≥200 nm) can greatly contribute to the basic science of electronic structures for almost all materials and their applications.

scholarly journals Analysis of Electronic Transition of Aqueous Solutions Studied by Far-ultraviolet Spectroscopy

2015 ◽  
Vol 64 (3) ◽  
pp. 173-184
Author(s):  
Takeyoshi GOTO ◽  
Akifumi IKEHATA ◽  
Yusuke MORISAWA ◽  
Noboru HIGASHI ◽  
Yukihiro OZAKI
Keyword(s):  
Aqueous Solutions ◽  
Electronic Transition ◽  
Ultraviolet Spectroscopy ◽  
Far Ultraviolet

scholarly journals Polyaromatic disordered carbon grains as carriers of the UV bump: Far-UV to mid-IR spectroscopy of laboratory analogs

2017 ◽  
Vol 607 ◽  
pp. A73 ◽  
Author(s):  
L. Gavilan ◽  
K. C. Le ◽  
T. Pino ◽  
I. Alata ◽  
A. Giuliani ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Interstellar Dust ◽  
Vacuum Ultraviolet ◽  
Interstellar Extinction ◽  
Electronic Transitions ◽  
Mid Infrared ◽  
Pressure Experiment ◽  
Circumstellar Extinction ◽  
Integrated Intensities ◽  
Far Ultraviolet

Context. A multiwavelength study of laboratory carbons with varying degrees of hydrogenation and sp2 hybridization is required to characterize the structure of the carbonaceous carriers of interstellar and circumstellar extinction. Aims. We study the spectral properties of carbonaceous dust analogs from the far-ultraviolet to the mid-infrared and correlate features in both spectral ranges to the aromatic/aliphatic degree. Methods. Analogs to carbonaceous interstellar dust encountered in various phases of the interstellar medium have been prepared in the laboratory. These are amorphous hydrogenated carbons (a-C:H), analogs to the diffuse interstellar medium component, and soot particles, analogs to the polyaromatic component. Thin films (d < 100 nm) have been measured in transmission in the vacuum-ultraviolet (VUV; 120–210 nm) within the atmospheric pressure experiment (APEX) chamber of the DISCO beam line at the SOLEIL synchrotron radiation facility. Spectra of these films were further measured through the UV-Vis (210 nm–1 μm) and in the mid-infrared (3–15 μm). Results. Tauc optical gaps, Eg, are derived from the visible spectra. The major spectral features are fitted through the VUV to the mid-infrared to obtain positions, full-widths at half maximum (FWHM), and integrated intensities. These are plotted against the position of the π-π∗ electronic transitions peak. Unidentified or overlapping features in the UV are identified by correlations with complementary infrared data. A correlation between the optical gap and position of the π-π∗ electronic transitions peak is found. The latter is also correlated to the position of the sp3 carbon defect band at ~8 μm, the aromatic C=C stretching mode position at ~6 μm, and the H/C ratio. Conclusions. Ultraviolet and infrared spectroscopy of structurally diverse carbon samples are used to constrain the nanostructural properties of carbon carriers of both circumstellar and interstellar extinction, such as the associated coherent lengths and the size of polyaromatic units. Our study suggests that carriers of the interstellar UV bump should exhibit infrared bands akin to the A/B classes of the aromatic infrared bands, while the circumstellar bump carriers should exhibit bands corresponding to the B/C classes.

Upper limits for a lunar dust exosphere from far-ultraviolet spectroscopy by LRO/LAMP

Icarus ◽  
2014 ◽  
Vol 233 ◽  
pp. 106-113 ◽  
Author(s):  
Paul D. Feldman ◽  
David A. Glenar ◽  
Timothy J. Stubbs ◽  
Kurt D. Retherford ◽  
G. Randall Gladstone ◽  
...  
Keyword(s):  
Ultraviolet Spectroscopy ◽  
Lunar Dust ◽  
Upper Limits ◽  
Far Ultraviolet
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