Dielectric relaxation of the extended hydration sheathe of DNA in the THz frequency region

被引：27
作者：
Polley, Debanjan [1 ,2 ]
Patra, Animesh [1 ]
Mitra, Rajib Kumar [1 ]
机构：
[1] SN Bose Natl Ctr Basic Sci, Dept Chem Biol & Macromol Sci, Kolkata 700098, India
[2] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Kolkata 700098, India
来源：
CHEMICAL PHYSICS LETTERS | 2013年 / 586卷
关键词：
TIME-DOMAIN SPECTROSCOPY; REFLECTION SPECTROSCOPY; TERAHERTZ SPECTROSCOPY; PULSE SPECTROSCOPY; ULTRAFAST DYNAMICS; VIBRATIONAL-MODES; BIOLOGICAL WATER; MINOR-GROOVE; LIQUID WATER; ABSORPTION;
D O I：
10.1016/j.cplett.2013.09.026
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Here we report the dielectric relaxation study of extended hydration sheathe of dilute aqueous solution of two DNA samples, extracted from salmon sperm (SS DNA) and calf thymus (CT DNA) at different concentrations in the frequency range of 0.3-2.1 THz. The frequency dependent complex dielectric response has been fitted according to a Debye relaxation model assuming three relaxation modes. The observed relaxation time constants do not deviate much from that of bulk water and do not follow any particular trend indicating to a marginal modification of the extended hydrogen bonded network of DNA. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：143 / 147
页数：5
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