Effect of substituents on electronic spectra and on luminescence of rhodamine dyes

1970 ◽  
Vol 13 (6) ◽  
pp. 1598-1600
Author(s):  
I. A. Gofman
Keyword(s):  
Electronic Spectra ◽  
Effect Of Substituents ◽  
Rhodamine Dyes

Pyrrole studies. IV. The electronic spectra of alkyl- and ethoxycarbonyldipyrromethenes

1965 ◽  
Vol 18 (3) ◽  
pp. 363 ◽  
Author(s):  
RW Guy ◽  
RA Jones
Keyword(s):  
Electronic Spectra ◽  
Electronic Effect ◽  
Steric Effects ◽  
Steric Interaction ◽  
Effect Of Substituents ◽  
Electronic And Steric Effects

The NH stretching frequency and the electronic spectra of 8 alkyl- and 12 ethoxycarbonyl-dipyrromethenes have been measured and the results correlated with the electronic and steric effects of the substituents. It is postulated that there is steric interaction between the two ethoxycarbonyl groups of 3,3'-diethoxycarbonyl. 4,5,4',5'-tetramethyldipyrromethene. The electronic effect of substituents in the 4,4'-positions of 3,5,3',5'-tetramethyldipyrromethenes is discussed.

The electronic spectra of diphenyl-sulphide and DI-2-pyridyl-sulphide. A CNDO/S treatment

1976 ◽  
Vol 73 ◽  
pp. 523-526 ◽  
Author(s):  
Vinicio Galasso ◽  
Giuseppe C. Pappalardo ◽  
Giuseppe Scarlata
Keyword(s):  
Electronic Spectra
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