Solvent- andpH-dependence of the absorption and fluorescence spectra of harman: Detection of three ground state and four excited state species

1982 ◽  
Vol 113 (4) ◽  
pp. 509-517 ◽  
Author(s):  
Otto S. Wolfbeis ◽  
Eva F�rlinger ◽  
Reinhold Wintersteiger
Keyword(s):  
Excited State ◽  
Ground State ◽  
Fluorescence Spectra ◽  
Absorption And Fluorescence Spectra

Theoretical and Experimental Investigation on Dipole Moment of Synthetized yt-Base in the Ground and Excited States

1979 ◽  
Vol 34 (2) ◽  
pp. 172-175 ◽  
Author(s):  
I. Gryczyński ◽  
Ch. Jung ◽  
A. Kawski ◽  
S. Paszyc ◽  
B. Skalski
Keyword(s):  
Experimental Investigation ◽  
Dipole Moment ◽  
Excited State ◽  
Excited States ◽  
Ground State ◽  
Fluorescence Spectra ◽  
Dipole Moments ◽  
Aprotic Solvents ◽  
Absorption And Fluorescence Spectra ◽  
First Excited State

Abstract The electric dipole moment of yt-Base calculated by the CNDO/S and JNDO/S method is μg = 3.42 D and μg = 3.74 D in the ground state and μe = 4.41 D and μe = 5.67 D in the first excited ππ*-state, respectively, μg and μe being nearly antiparallel. Measurements of absorption and fluorescence spectra of yt-Base in aprotic solvents of different polarity yielded μg = 3.8 D and μe = 4.3 D and the directions of dipole moments were found to be nearly antiparallel.This comparison may be considered as an indication for the ππ* character of the observable first excited state, although the CNDO/S-and JNDO/S-calculations predict a nπ*-state as the lowest lying excited state

A Highly Resolved Yibronic Spectra of Dioxido-p-terphenyl and Trioxido-p-quaterphenyl in n-Hexanc at 77 K

1982 ◽  
Vol 37 (1) ◽  
pp. 91-94
Author(s):  
A. Kawski ◽  
M. Ligȩza
Keyword(s):  
Raman Spectra ◽  
Ground State ◽  
Fluorescence Spectra ◽  
Vibrational Structure ◽  
Ir And Raman Spectra ◽  
Absorption And Fluorescence Spectra ◽  
Excited Singlet ◽  
Ir And Raman ◽  
Good Agreement

Abstract Highly resolved vibronic absorption and fluorescence spectra of dioxido-p-terphenyl and the fluorescence spec-trum of trioxido-p-quaterphenyl in n-hexane at 77 K were obtained. The analysis of the vibrational structure in the excited singlet Si and in the ground So state gives funda-mental frequencies in the ground state in good agreement with those from infrared (IR) and Raman spectra.

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