The role of selected cations in the formation of pseudomicelles in aqueous humic acid.
The role of selected cations in the formation of pseudomicelles in aqueous humic acid.
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DOI：
10.1016/s0039-9140(96)02116-9
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发表时间：
1997-05
期刊：
影响因子：
6.1
通讯作者：
R. von Wandruszka;C. Ragle;R. Engebretson
中科院分区：
文献类型：
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作者：
R. von Wandruszka;C. Ragle;R. Engebretson
在腐植酸水溶液中，通过添加稀土离子和钍离子，评估了芘探针的荧光强度增强。在三价离子中，尺寸起了一定的作用，其中小的Lu3+离子产生了最大的增加。这归因于它在腐植酸聚合物中引起假胶束化的卓越能力。观察到缓慢的动力学效应，导致荧光在7h内显著增强，这归因于在腐植酸水溶液中的连续聚集过程，导致探针分子的微环境更加粘稠。
The fluorescence intensity enhancement of a pyrene probe in aqueous humic acid solutions was assessed in terms of added lanthanide and thorium cations. Among the trivalent ions it was found that size played a role, with the small Lu3+ion producing the greatest increase in pyrene emission. This was attributed to its superior ability to cause pseudomicellization in the humic acid polymer. Slow kinetic effects were observed, leading to substantial fluorescence enhancement over a period of 7 h. This was ascribed to a continuous aggregation process in aqueous humic acid, leading to ever more viscous microenvironments for the probe molecule.