The effect of solvent dynamics on the low frequency collective motions of DNA in solution and unoriented films

Infrared spectroscopy is used to probe the dynamics of in vitro samples of DNA prepared as solutions and as solid unoriented films. The lowest frequency DNA mode identified in the far-infrared spectra of the DNA samples is found to shift in frequency when the solvent influence in the hydration shell...

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Bibliographic Details
Published in:The Journal of chemical physics 2006-06, Vol.124 (22), p.224706-224706
Main Authors: Woods, K N, Lee, S A, Holman, H-Y N, Wiedemann, H
Format: Article
Language:English
Subjects:
Animals
BASIC BIOLOGICAL SCIENCES
Biophysics - methods
Cattle
Chemistry, Physical - methods
DNA
DNA - chemistry
DYNAMICS
Ethanol - chemistry
Glass
Hydrogen Bonding
Molecular Conformation
Other,OTHER
Polymers - chemistry
SOLVENTS
Spectrophotometry, Infrared - methods
Temperature
Thymus Gland - metabolism
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Summary:Infrared spectroscopy is used to probe the dynamics of in vitro samples of DNA prepared as solutions and as solid unoriented films. The lowest frequency DNA mode identified in the far-infrared spectra of the DNA samples is found to shift in frequency when the solvent influence in the hydration shell is altered. The lowest frequency mode also has characteristics that are similar to beta-relaxations identified in other glass forming polymers.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.2200349