Dynamics of Chitosan by 1H NMR Relaxation

被引：33
作者：
Novoa-Carballal, Ramon
Fernandez-Megia, Eduardo [1 ]
Riguera, Ricardo
机构：
[1] Univ Santiago de Compostela, Dept Quim Organ, Fac Quim, Santiago De Compostela 15782, Spain
来源：
BIOMACROMOLECULES | 2010年 / 11卷 / 08期
关键词：
NUCLEAR MAGNETIC-RELAXATION; DEACETYLATED CHITINS CHITOSANS; FIELD NMR-SPECTROSCOPY; SOLUTION CONFORMATION; LIGHT-SCATTERING; EXCLUSION CHROMATOGRAPHY; ROTATIONAL-DYNAMICS; SEGMENTAL DYNAMICS; SYNTHETIC-POLYMERS; INTERNAL-ROTATION;
D O I：
10.1021/bm100447f
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The dynamics of chitosan (CS) in solution have been studied by H-1 NMR relaxation [longitudinal (T-1) and transverse (T-2) relaxation times and NOE] as a function of the degrees of acetylation (DA, 1-70) and polymerization (DP, 10-1200), temperature (278-343 K), concentration (0.1-30 g/L), and ionic strength (50-400 mM). This analysis points to CS as a semirigid polymer with increased flexibility at higher DA in agreement with reduced electrostatic repulsions between protonated amino groups.
引用
收藏
页码：2079 / 2086
页数：8
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