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American Institute of Physics, Journal of Applied Physics, 4(113), p. 044702, 2013

DOI: 10.1063/1.4789011

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Mild hydration of didecyldimethylammonium chloride modified DNA by 1H-nuclear magnetic resonance and by sorption isotherm

Journal article published in 2013 by Hubert Haranczyk, Jan Kobierski, Jacek Niziol, E. Hebda, Jan Pielichowski, Dorota Zalitacz, Monika Marzec, A. El Ghayoury ORCID
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This paper is available in a repository.

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Abstract

The gaseous phase hydration of deoxyribonucleic acid and didecyldimethylammonium chloride (C19H42ClN) complexes (DNA-DDCA) was observed using hydration kinetics, sorption isotherm, and high power nuclear magnetic resonance. Three bound water fractions were distinguished: (i) a very tightly bound water not removed by incubation over silica gel, (ii) a tightly bound water saturating with the hydration time t1h = (0.59 ± 0.04) h, and a loosely bound water fraction, (iii) with the hydration time t2h = (20.9 ± 1.3) h. Proton free induction decay was decomposed into the signal associated with the solid matrix of DNA-DDCA complex (T2S∗ ≈ 30 μs) and two liquid signal components coming from tightly bound (T2L1∗ ≈ 100 μs) and from loosely bound water fraction (T2L2∗ ≈ 1000 μs).