The nature of the electronic excitations capturing centres in the DNA

Valeriy Yashchuk; Vladislav Kudrya; Mykhaylo Losytskyy; Hiroaki Suga; Tymish Ohul'chanskyy

doi:10.1016/j.molliq.2006.03.020

The nature of the electronic excitations capturing centres in the DNA

Valeriy Yashchuk
, Vladislav Kudrya
, Mykhaylo Losytskyy
, Hiroaki Suga
, Tymish Ohul'chanskyy

Department of Chemical and Biological Engineering

Kyiv National Taras Shevchenko University
SUNY Buffalo
The University of Tokyo

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

The spectral peculiarities of the DNA, the polynucleotide poly(dAdT)₂, the oligonucleotide d(CCCGGGTTTAAA), the trimer d(ATC) and the low molecular model compounds dGMP, dAMP, dCMP and dTMP were studied. The system of energy sites and electronic processes in the DNA were examined. The lowest excited electronic singlet levels of the DNA were shown to be related with guanine bases, while the lowest excited triplet levels are connected with adenine bases. The nature of the fluorescence and phosphorescence emission centres in the DNA is discussed. It was shown the phosphorescence of the DNA is close to emission of the triplet excitations traps associated with AT-sequences. These centres as well as adenine bases are most photostable. The latter proves to be a successful mechanism for DNA self protection.

Original language	English
Pages (from-to)	79-83
Number of pages	5
Journal	Journal of Molecular Liquids
Volume	127
Issue number	1-3
DOIs	https://doi.org/10.1016/j.molliq.2006.03.020
State	Published - Aug 15 2006

Keywords

DNA
Energy transfer
Excitation traps

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10.1016/j.molliq.2006.03.020

Cite this

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title = "The nature of the electronic excitations capturing centres in the DNA",

abstract = "The spectral peculiarities of the DNA, the polynucleotide poly(dAdT)2, the oligonucleotide d(CCCGGGTTTAAA), the trimer d(ATC) and the low molecular model compounds dGMP, dAMP, dCMP and dTMP were studied. The system of energy sites and electronic processes in the DNA were examined. The lowest excited electronic singlet levels of the DNA were shown to be related with guanine bases, while the lowest excited triplet levels are connected with adenine bases. The nature of the fluorescence and phosphorescence emission centres in the DNA is discussed. It was shown the phosphorescence of the DNA is close to emission of the triplet excitations traps associated with AT-sequences. These centres as well as adenine bases are most photostable. The latter proves to be a successful mechanism for DNA self protection.",

keywords = "DNA, Energy transfer, Excitation traps",

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T1 - The nature of the electronic excitations capturing centres in the DNA

AU - Yashchuk, Valeriy

AU - Kudrya, Vladislav

AU - Losytskyy, Mykhaylo

AU - Suga, Hiroaki

AU - Ohul'chanskyy, Tymish

PY - 2006/8/15

Y1 - 2006/8/15

N2 - The spectral peculiarities of the DNA, the polynucleotide poly(dAdT)2, the oligonucleotide d(CCCGGGTTTAAA), the trimer d(ATC) and the low molecular model compounds dGMP, dAMP, dCMP and dTMP were studied. The system of energy sites and electronic processes in the DNA were examined. The lowest excited electronic singlet levels of the DNA were shown to be related with guanine bases, while the lowest excited triplet levels are connected with adenine bases. The nature of the fluorescence and phosphorescence emission centres in the DNA is discussed. It was shown the phosphorescence of the DNA is close to emission of the triplet excitations traps associated with AT-sequences. These centres as well as adenine bases are most photostable. The latter proves to be a successful mechanism for DNA self protection.

AB - The spectral peculiarities of the DNA, the polynucleotide poly(dAdT)2, the oligonucleotide d(CCCGGGTTTAAA), the trimer d(ATC) and the low molecular model compounds dGMP, dAMP, dCMP and dTMP were studied. The system of energy sites and electronic processes in the DNA were examined. The lowest excited electronic singlet levels of the DNA were shown to be related with guanine bases, while the lowest excited triplet levels are connected with adenine bases. The nature of the fluorescence and phosphorescence emission centres in the DNA is discussed. It was shown the phosphorescence of the DNA is close to emission of the triplet excitations traps associated with AT-sequences. These centres as well as adenine bases are most photostable. The latter proves to be a successful mechanism for DNA self protection.

KW - DNA

KW - Energy transfer

KW - Excitation traps

UR - https://www.scopus.com/pages/publications/33747790936

U2 - 10.1016/j.molliq.2006.03.020

DO - 10.1016/j.molliq.2006.03.020

M3 - Article

AN - SCOPUS:33747790936

SN - 0167-7322

VL - 127

SP - 79

EP - 83

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

IS - 1-3

ER -

The nature of the electronic excitations capturing centres in the DNA

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