Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions

Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions
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不饱和甘氨酸水溶液中分子和介观尺度簇的研究

DOI:
10.1016/j.colsurfa.2019.123633
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发表时间:
2019
期刊:
Physicochemical and Engineering Aspects
影响因子:
--
通讯作者:
Zimbitas G
Zimbitas G
中科院分区:
--
文献类型:
--
作者:
Zimbitas G

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本工作采用DLS、NTA、SAXS和NMR等方法研究了甘氨酸在欠饱和水溶液中的团簇数量、尺寸分布和结构。分子和胶体规模(中尺度)集群半径约0.3-0.5 nm和100-150 nm,分别观察到使用互补的实验技术。分子簇与水溶液中与甘氨酸单体平衡存在的水合甘氨酸二聚体一致。先前在过饱和甘氨酸溶液中观察到的介观簇似乎是无限稳定的,在这里研究的所有甘氨酸浓度的介观结构的不饱和溶液内相互平衡,低至1 mg/g水。
In this work DLS, NTA, SAXS and NMR were used to investigate populations, size distributions and structure of clusters in undersaturated aqueous solutions of glycine. Molecular and colloidal scale (mesoscale) clusters with radii around 0.3-0.5 nm and 100–150 nm, respectively, were observed using complementary experimental techniques. Molecular clusters are consistent with hydrated glycine dimers present in equilibrium with glycine monomers in aqueous solutions. Mesoscale clusters previously observed in supersaturated glycine solutions appear to be indefinitely stable, in mutual equilibrium within mesostructured undersaturated solutions across all glycine concentrations investigated here, down to as low as 1 mg/g of water.
DOI: 10.1103/physrevlett.99.115702
发表时间: 2007-09-14
影响因子: 8.6
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