The electronic transitions of dibenzothiophene: linear dichroism spectroscopy and quantum chemical calculations

2003 ◽  
Vol 661-662 ◽  
pp. 603-610 ◽  
Author(s):  
Jens Spanget-Larsen ◽  
Erik W Thulstrup
Keyword(s):  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Linear Dichroism ◽  
Electronic Transitions

Electronic states of emodin and its conjugate base. Synchrotron linear dichroism spectroscopy and quantum chemical calculations

2008 ◽  
Vol 352 (1-3) ◽  
pp. 167-174 ◽  
Author(s):  
Son Chi Nguyen ◽  
Bjarke Knud Vilster Hansen ◽  
Søren Vrønning Hoffmann ◽  
Jens Spanget-Larsen
Keyword(s):  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Electronic States ◽  
Linear Dichroism ◽  
Conjugate Base

Electronic Spectra and Photochemical Properties of Acetyldihydroquinolinones

1992 ◽  
Vol 47 (12) ◽  
pp. 1775-1778 ◽  
Author(s):  
Snezhana Bakalova ◽  
Ivanka Kavrakova
Keyword(s):  
Quantum Chemical Calculations ◽  
Uv Irradiation ◽  
Electronic Spectra ◽  
Quantum Chemical ◽  
Polyphosphoric Acid ◽  
Acyl Migration ◽  
Electronic Transitions ◽  
Radical Mechanism ◽  
Photochemical Rearrangement ◽  
Photochemical Properties

The absorption and luminescence properties of 6-acetyl-2,3-dihydro-4(1H)-quinolinone are described and compared to those of the parent 2,3-dihydro-4(1H)-quinolinone. The character of the electronic transitions is determined by PPP quantum chemical calculations.An N-acyl migration leading to the formation of 6-acetyl-2,3-dihydro-4(1H)-quinolinone takes place upon UV irradiation or heating with polyphosphoric acid of 1-acetyl-2,3-dihydro-4-(1H)-quinolinone. A radical mechanism of the photochemical rearrangement is proposed.

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