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періодичних видань НАН України
періодичних видань НАН України
Conformations of ribonucleoside uridine in the low temperature Ar matrices
Репозиторій DSpace/Manakin
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Conformations of ribonucleoside uridine in the low temperature Ar matrices
Тема:
Nanostructures and Impurity Centers in Cryogenic Environment
Інший ID:
PACS: 33.15.–e, 67.80.–s
Посилання:
Conformations of ribonucleoside uridine in the low temperature Ar matrices / A.Yu. Ivanov // Физика низких температур. — 2010. — Т. 36, № 5. — С. 571–578. — Бібліогр.: 32 назв. — англ.
Підтримка:
The present work was carried out due to the financial support of the National Academy of Sciences of Ukraine. The author thanks S.G. Stepanian for helpful discussion and L.F. Belous for his great help in organization and carrying out of calculations on the GRID-cluster of B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine.
Дата:
2010
Переглядів:
869
Завантажень:
504
Анотація:
The conformational equilibrium of the ribonucleoside uridine molecules in the low temperature Ar matrices was investigated by the FTIR matrix isolation spectroscopy and quantum-chemical calculations at the DFT and MP2 levels of theory. It was established that conformers with the carbonyl group C2O which takes part in the intramolecular hydrogen bonds dominate in the low temperature matrices. Populations of syn- and anticonformers with intramolecular hydrogen bonds O5’H–O2 and O2’–O2, respectively, are equal practically. Unlike 2’-deoxyuridine, the syn-conformers of Ur with C3’-endo structure of the ribose ring (South) have been found in Ar matrices. At the same time the conformations of C2’-endo (North) ribose ring prevail both in antiand syn-conformers.
