THE EXCITED STATES AND ENERGY TRANSFER IN SOME FUNCTIONAL
MULTICOMPONENT SYSTEMS, V.Yu.Kudrya, V.M.Yashchuk, Kyiv T.Shevchenko
National University, 6, Akademika Glushkova ave., 03127 Kyiv, Ukraine,
M.Yu.Lossytskyy and I.Ya.Dubey, Institute of Molecular Biology and
Genetics of NASU, 150, Akademika Zabolotnogo str., 03143, Kyiv,
Ukraine
The absorption and luminescence spectra of nucleotides
(5'-monophosphates of deoxyguanosine (pdG), deoxycytidine (pdC),
deoxyadenosine (pdA) and thymidine (pdT)) that are elementary DNA
units, and their co-systems, dinucleotide deoxyadenylyl-deoxyguanosine
(dApdG) and trinucleotide deoxyadenylyl-thymidylyl-deoxycytidine
(dApdTpdC) (these multicomponent systems are DNA fragments), have been
measured at low temperatures (4,2 K-77 K). Based on this data the
energy positions of the first excited singlet (S[1]) and triplet
(T[1]) levels of nucleotides were determined (see the table). Obtained
data manifest that the triplet energy transfer in investigated DNA
fragments appears to be resolved at Tł35 K.
Level, cm-1
T, K
pdC
pdG
pdT
pdA

4,2
33140
33000
33500
34200
S[1]
35
33210
33060
33530
34290

77
33090
33030
33530
34490

4,2
27120
26400
27020
26120
T[1]
35
27040
26380
26120
26050

77
26630
26320
26160
25950

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