ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The Raman specrum of β-adenosine-5′-phosphoric acid has been observed in its aqueous solution with 6471, 5145, 4880, 4579, 4579, and 3511 Å excitation. An examination of the manner of increase of the intensities of the Raman lines at 1580 and 1484 cm-1 of the adenine residue indicated that the electronic excited state corresponding to a weak absorption band at 276 nm is responsible for these Raman scatterings. This idea has been supported by a similar examination of the Raman spectrum of β-adenosine-3′,5′-cyclic phosphoric acid and an examination of the effect of temperature on the Raman spectra of poly rA and poly(rA-rU). A discussion is included of the geometrical structure of the adenine residue in its lowest-singlet electronic excited state, based on the vibrational structure of the fluorescence spectrum, the result of a normal coordinate treatment, and the result of a semiempirical Pariser-Parr-Pople calculation, as well as the Raman data.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250020608
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