Absorption Spectra of 4f Electron Transitions of Neodymium and Erbium with 8-Hydroxyquinoline-5-sulphonic Acid and Diethylamine Systems and Its Analytical Application

1992 ◽  
Vol 25 (6) ◽  
pp. 1119-1130 ◽  
Author(s):  
Wang Naixing ◽  
Qi Ping
Keyword(s):  
Absorption Spectra ◽  
Sulphonic Acid ◽  
Analytical Application ◽  
Electron Transitions

Study of the absorption spectra of the 4f electron transitions of the praseodymium complex with ciprofloxacin and its analytical application

The Analyst ◽  
2001 ◽  
Vol 126 (8) ◽  
pp. 1440-1443 ◽  
Author(s):  
Jiang Wei ◽  
Wang Naixing ◽  
Si Zhikun ◽  
Liu Fuxiang ◽  
Wu Bo ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Analytical Application ◽  
Electron Transitions ◽  
Praseodymium Complex

Furan and Thiophene Analogs of Phenanthrene A Theoretical Study of the Absorption Spectra of Benzodifurans, Benzodithiophenes and Thienobenzofurans

1971 ◽  
Vol 26 (12) ◽  
pp. 1235-1240 ◽  
Author(s):  
L. Klasinc ◽  
J. V. Knop
Keyword(s):  
Absorption Spectra ◽  
Theoretical Study ◽  
Oscillator Strengths ◽  
Electron Transitions ◽  
Good Agreement ◽  
Lcao Mo

The LCAO -MO -SCF -CI method was applied to benzo(1,2-b : 4,3-b′) -difuran and -dithiophene, benzo (2,1-b : 3,4-b′) -difuran and -dithiophene, benzo (1,2-b : 3,4-b′) -difuran and -dithiophene, thieno (2,3-e) benzofuran, thieno (3,2-e) benzofuran, thieno (3,2-g) benzofuran, thieno (2,3-g) benzofuran, benzofuran, benzothiophene and phenanthrene. The calculated π-electron transitions and their oscillator strengths are in good agreement with known absorption spectra. The resemblance of these spectra to the absorption spectra of phenanthrene and phenanthrolines is discussed.

scholarly journals Permittivity spectra and structure of d-bands of germanium telluride, tin telluride and lead telluride

2020 ◽  
pp. 44-49
Author(s):  
D.A. Perevoshchikov ◽  
◽  
V.Val. Sobolev ◽  
A.I. Kalugin ◽  
E.A. Antonov ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Lead Telluride ◽  
Germanium Telluride ◽  
General Behavior ◽  
Electron Transitions ◽  
Tin Telluride ◽  
Experimental Absorption ◽  
Exciton Transitions

Based on the experimental absorption spectra, the permittivity spectra of GeTe, SnTe, and PbTe crystals were obtained in the region of electron transitions from core d -bands of cations. Their specific features and general behavior are revealed. The permittivity spectra of each crystal were decomposed into six elementary components and their main parameters were determined by using of combined Argand diagrams method. Based on the theory of interband and exciton transitions, the nature of the formation of these oscillators was proposed.

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