Specific Interactions of Ag+ Ions with Anionic Polyacrylate Chains in Dilute Solution
Specific Interactions of Ag+ Ions with Anionic Polyacrylate Chains in Dilute Solution
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DOI：
10.1021/ma501146m
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发表时间：
2014-11-25
期刊：
影响因子：
5.5
通讯作者：
Huber, K.
中科院分区：
文献类型：
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作者：
Ezhova, A.;Huber, K.
一个详细的光散射调查提出了两个长链聚丙烯酸钠（NaPA）的稀溶液中的单价银离子的存在下，在0.01 M的硝酸钠水溶液中，在pH值为9。研究的相关性基于两个特征：（i）尽管其单价，但预期Ag+与NaPA的相互作用模式比基于碱性阳离子的盐复杂得多;（ii）AgNO 3水溶液在NaPA存在下在UV光下成核Agnanoparticles形成，这可能受到溶液行为的调制。我们的研究揭示了以下结果。添加少量的Ag+离子导致PA链的聚集，而没有相当大的线圈收缩。在银离子/单体的比率为0.001
A detailed light scattering investigation is presented on dilute solutions of two long-chain sodium polyacrylates (NaPA) in the presence of monovalent Ag+ ions in 0.01 M NaNO3 aqueous solution at a pH of 9. The relevance for the investigation is based on two features: (i) despite its monovalency, Ag+ is expected to exhibit a much more complex interaction pattern with NaPA than salts based on alkaline cations do; (ii) aqueous solutions of AgNO3 nucleate Agnanoparticle formation in the presence of NaPA under UV light, which may be modulated by the solution behavior. Our study revealed the following results. Addition of a low amount of Ag+ ions leads to an aggregation of PA-chains without considerable coil shrinking. At a ratio of silver ions per monomer of 0.001