
TY  - JOUR
A1  - Connell, KE 
A1  - Kurucsev, T 
A1  - Norden, B 
T1  - Electronic-Transitions in the Near-Ultraviolet Spectra of Uracil, Thymine, Uridylyl(3'-5')uridine and Thymidylyl(3'-5')thymidine
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1988
VL  - 41
IS  - 10
SP  - 1509
EP  - 1522
KW  - 
UR  - https://doi.org/10.1071/CH9881509 
N2  - The absorption spectra in the near-ultraviolet region of uracil and thymine, and of their derivatives may be deconvoluted into two vibronic progressions; the higher-energy progression has a relatively low intensity. The corresponding component spectra coincide with the two separate transitions manifested in the circular dichroism of the relevant nucleoside derivatives. A series of apparent contradictions may be resolved by the assumption that the higher-energy transition in absorption is a vibronically allowed (&#960;*,n) transition. This interpretation is further supported by an analysis of the spectra of uridylyl (3&#8242;-5&#8242;) uridine and thimidylyl (3&#8242;-5&#8242;) thymidine in terms of exciton interactions. The magnitude of exciton coupling in the dinucleoside phosphates is found to be small but significant in terms of energy transfer rates. 
ER  -

