Ultraviolet absorption bands of [Cs n+1 I n ]+ (n<14) clusters

1993 ◽  
Vol 26 (1-4) ◽  
pp. 198-200 ◽  
Author(s):  
Xiuling Li ◽  
Robert L. Whetten
Keyword(s):  
Ultraviolet Absorption ◽  
Absorption Bands

Halogen-Substitution Effect on the Optical Absorption Bands of Uracil*

1974 ◽  
Vol 29 (9-10) ◽  
pp. 493-495 ◽  
Author(s):  
Wolfgang Lohmann
Keyword(s):  
Optical Absorption ◽  
Linear Function ◽  
Absorption Spectra ◽  
Electron Affinity ◽  
Substitution Effect ◽  
Ultraviolet Absorption ◽  
Red Shift ◽  
Electron Affinities ◽  
Absorption Bands ◽  
Extinction Coefficients

Abstract The ultraviolet absorption spectra of uracil and its 5-halogenated derivatives have been in ­ vestigated in regard to the electron attracting properties of the substituents. It could be shown that the position of the two absorption bands is proportional to the inverse of the electronegativity; the extinction coefficients are a linear function of the electron affinities. In this way, the red shift obtained upon substitution with halogens can be explained. Also, the decrease in absorbance of the absorption bands at λ > 250 nm, occuring concomitant­ ly, is understandable. The increase in absorbance with increasing electron affinity, as observed in the case of the absorption bands at λ < 250 nm, might question the assumption that this band is due to a higher pi -pi* excitation

Vacuum Ultraviolet Absorption Bands of Ag-Doped Alkali Halides

1964 ◽  
Vol 3 (S1) ◽  
pp. 631 ◽  
Author(s):  
Ryumyo Onaka ◽  
Atsuo Fukuda ◽  
Koichi Inohara ◽  
Teruhiko Mabuchi ◽  
Yoshio Fujioka
Keyword(s):  
Vacuum Ultraviolet ◽  
Alkali Halides ◽  
Ultraviolet Absorption ◽  
Absorption Bands

THE ULTRAVIOLET ABSORPTION SPECTRA OF THE FERRIC ION AND ITS FIRST HYDROLYSIS PRODUCT IN AQUEOUS SOLUTIONS

1957 ◽  
Vol 35 (9) ◽  
pp. 1002-1009 ◽  
Author(s):  
R. C. Turner ◽  
Kathleen E. Miles
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Absorption Spectra ◽  
Perchloric Acid ◽  
Hydrolysis Product ◽  
Ultraviolet Absorption ◽  
Ferric Ion ◽  
Absorption Bands

The absorption spectra of the ferric ion and its first hydrolysis product in an aqueous solution of perchloric acid was determined. The Fe3+ ion has two absorption bands, one with a maximum at 240 mμ and another which extends into the region below 200 mμ. The FeOH2+ ion also has two absorption bands, the maxima of which occur at 300 mμ and 205 mμ. A figure shows the magnitude of the absorption of each of these ions from 200 to 350 mμ.

The Ultraviolet Absorption Bands of Diacetylene

1935 ◽  
Vol 47 (11) ◽  
pp. 886-886 ◽  
Author(s):  
Sho-Chow Woo ◽  
T. C. Chu
Keyword(s):  
Ultraviolet Absorption ◽  
Absorption Bands
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