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Effect of introduci...
Effect of introducing thymine spacers into an adenine strand : Electronic decoupling?
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Nielsen, Lisbeth Munksgaard (author)
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- Holm, Anne I. S. (author)
- Stockholms universitet,Fysikum
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Hoffmann, Sören Vronning (author)
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Nielsen, Steen Brondsted (author)
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(creator_code:org_t)
- Elsevier BV, 2011
- 2011
- English.
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In: Journal of Photochemistry and Photobiology A. - : Elsevier BV. - 1010-6030 .- 1873-2666. ; 220:1, s. 1-3
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Electronic coupling between DNA bases governs the deexcitation pathways after light absorption as well as the ability of the DNA strand to conduct charge. UV excitation of single strands of adenine bases involves two adjacent bases while the spatial extent of the excited state wavefunction following VUV excitation is over eight bases. In this work, we have recorded synchrotron radiation circular dichroism spectra for a series of DNA strands on the form A(n)T(m)A(n), n = 1-5 and m = 1-3, in aqueous solution to study the effect of introducing thymine spacers on the electronic coupling between the adenines. We find that a single thymine spacer is enough to eliminate the strong coupling between the adenine bases for all excitation wavelengths between 175 nm and 330 nm.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- DNA strands
- Synchrotron radiation
- Circular dichroism
- Electronic coupling
- Adenine bases
Publication and Content Type
- ref (subject category)
- art (subject category)
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