Raman scattering in dried DNA and crystalline amino acids

Raman spectrum characteristics of dried deoxyribonucleic acid (DNA) and two types of crystalline amino acids (L-lysine, D-asparagine) are compared in a wide range of frequencies, including the regions of lattice (7 to 200 cm −1 ) and intramolecular (200 to 4000 cm −1 ) vibrations. It is found that t...

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Bibliographic Details
Published in:Physics of wave phenomena 2016-10, Vol.24 (4), p.272-278
Main Authors: Gorelik, V. S., Zlobina, L. I., Krylov, A. S., Sverbil, V. P., Sverbil, P. P.
Format: Article
Language:English
Subjects:
Acoustics
Amino acids
Coupling (molecular)
Crystal structure
Crystallinity
Deoxyribonucleic acid
DNA
Lattice vibration
Low frequencies
Lysine
Molecular chains
Nonlinear Light Scattering
Physics
Physics and Astronomy
Quantum Optics
Raman spectra
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Summary:Raman spectrum characteristics of dried deoxyribonucleic acid (DNA) and two types of crystalline amino acids (L-lysine, D-asparagine) are compared in a wide range of frequencies, including the regions of lattice (7 to 200 cm −1 ) and intramolecular (200 to 4000 cm −1 ) vibrations. It is found that the spectral position of the low-frequency band in the Raman spectrum of DNA with a peak near 26 cm −1 correlates with the Raman spectrum of high-Q low-frequency modes that manifest themselves in the crystalline amino acids under investigation. The low-frequency band of DNA refers to a twist-like vibrational mode of nucleobases. The intensities of this DNA mode and the high-Q lattice modes of the crystalline amino acids L-lysine and D-asparagine are several times as high as those of the Raman lines corresponding to the intramolecular modes. Resonant coupling of low-frequency modes of DNA and amino acid molecular chains is analyzed.
ISSN:1541-308X
1934-807X
DOI:10.3103/S1541308X1604004X