When is water not water? Exploring water confined in large reverse micelles using a highly charged inorganic molecular probe
When is water not water? Exploring water confined in large reverse micelles using a highly charged inorganic molecular probe
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DOI：
10.1021/ja0624319
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发表时间：
2006-10-04
影响因子：
15
通讯作者：
Levinger, Nancy E.
中科院分区：
文献类型：
--
作者：
Baruah, Bharat;Roden, Jennifer M.;Levinger, Nancy E.
气溶胶OT（AOT）反胶团的内部水池随着胶团尺寸的增大而趋向于本体水性质。因此，与小的反胶束相比，在大的反胶束中与本体水行为的偏差是不太预期的。使用V-51核磁共振光谱法探测具有高电荷十钒酸盐（V-10）低聚物的AOT反胶束的内部水池，显示了溶质环境的明显变化。例如，当将质子化V-10的酸性储备溶液置于反胶束中时，V-51化学位移表明V-10被去质子化，与胶束内水池中质子浓度的降低一致。结果表明，反胶束内部存在质子梯度，使内部中性，而界面区域是酸性的。
The interior water pool of aerosol OT (AOT) reverse micelles tends toward bulk water properties as the micelle size increases. Thus, deviations from bulk water behavior in large reverse micelles are less expected than in small reverse micelles. Probing the interior water pool of AOT reverse micelles with a highly charged decavanadate (V-10) oligomer using V-51 NMR spectroscopy shows distinct changes in solute environment. For example, when an acidic stock solution of protonated V-10 is placed in a reverse micelle, the V-51 chemical shifts show that the V-10 is deprotonated consistent with a decreased proton concentration in the intramicellar water pool. Results indicate that a proton gradient exists inside the reverse micelles, leaving the interior neutral while the interfacial region is acidic.