
TY  - JOUR
A1  - Traore, Hassimi 
A1  - Saunders, Michael 
A1  - Blasiman, Scott 
T1  - Ultraviolet Absorption and Fluorescence Studies of 1-Methyl-2(1<emph type="2">H</emph>)-Pyridinimine and Derivative in Polar and Non-Polar Solvents
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2001
VL  - 53
IS  - 12
SP  - 951
EP  - 957
KW  - Ultraviolet absorption; 1-methyl-2(1H)-pyridinimine; 1,2-dimethyl-pyridinimine; fluorescence quantum yield; polar and non-polar solvents; proximity effects; Franck&#8211;Condon factor.
UR  - https://doi.org/10.1071/CH00053 
N2  - The ultraviolet (u.v.) and fluorescence spectra and relative fluorescence intensities of 1-methyl-2(1H)-pyridinimine (1-MIP) and 1,2-dimethylpyridinimine (2-MIP) were measured in several solvents at room temperature. The solvents&#8217; effect on the absorption and fluorescence spectra of MIP indicates that the &#960;&#960;* transition shifts to higher energies (shorter wavelengths) are due to solvents&#8217; interactions and the formation of the pyridinium cation. One major difference in the u.v. and fluorescence spectra is the small relative intensity in non-polar solvents. This was attributed to the proximity effect of &#960;&#960;* and n&#960;* states which can lead to vibronic interactions, and to distortions of the excited-state potential surfaces. In polar solvents, however, these two states are shifted in energy due to solvent&#8211;solute interactions, which decrease the energy of the potential surface. 
ER  -

