SAXS studies on added-salt species dependence of conformation of fully-charged poly(L-glutamate) in aqueous solutions
SAXS studies on added-salt species dependence of conformation of fully-charged poly(L-glutamate) in aqueous solutions
复制标题
水溶液中完全带电的聚（L-谷氨酸）构象的添加盐种类依赖性的 SAXS 研究
DOI：
10.1088/1742-6596/247/1/012045
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发表时间：
2010
影响因子：
6.1
通讯作者：
K. Kurita
中科院分区：
文献类型：
--
作者：
S. Shimizu;Y. Muroga;S. Iida;M. Miyahara;M. Ishibashi;Hiroki Ikake;K. Kurita
用小角X射线散射（SAXS）研究了反离子种类对全电荷聚谷氨酸在加盐水溶液中局部构象的影响。在存在一价反离子的情况下，散射行为可以通过考虑蠕虫链散射函数的排斥体积效应和分子间界面相互作用来解释。另一方面，由于在二价反离子存在下的溶液的SAXS轮廓与树枝状大分子的散射函数很好地拟合，这表明在这种溶液中的聚合物链的构象将比在单价离子存在下的构象更紧凑。
The effect of counter-ion species on the local conformation of fully-charged poly(L-glutamate) in added-salt aqueous solutions were studied by small-angle X-ray scattering(SAXS). In the case of presence of monovalent counter-ion, the scattering behaviour could be explained by taking into consideration the excluded volume effect and intermolecular-interface interaction on the scattering function of wormlike chain. On the other hand, since SAXS profile of the solution in the presence of divalent counter-ion well fitted to the scattering function of dendrimer, it suggested that the conformation of polymer chain in such solution would be more compact conformation than that of presence of monovalent ion.