Nonionic rodlike micelles in dilute and semidilute solutions: intermicellar interaction and the scaling law
Nonionic rodlike micelles in dilute and semidilute solutions: intermicellar interaction and the scaling law
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稀溶液和半稀溶液中的非离子棒状胶束：胶束间相互作用和标度定律
DOI：
10.1021/j100331a035
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
T. Imae
中科院分区：
文献类型：
--
作者：
T. Imae
从价带边缘到溶液中的还原剂的空穴，如图10a所示。当然，如果溶液中没有丙烷，光生空穴将直接攻击溶剂。对于除丙烷之外的烷烃，较小的CD因子可以通过其较低的空穴捕获截面或其波动能级与Ti 〇 2导带边缘的较小重叠来解释。将该酸溶剂中的结果与超酸之一氟磺酸（HS 03 F）中的结果进行比较似乎是有趣的。在后一种溶剂中，已知烷烃在Pt上以扩散控制的速率氧化，阳极电位低于溶剂氧化开始时的电位。26，27因此，烷烃氧化代替溶剂氧化是放热反应。此外，氧化被认为涉及具有高度还原能力的烷烃自由基的形成。然而，在用甲烷、乙烷或丙烷净化溶剂之前和之后，在n-TiO 2上没有发现光电流的增加和任何视觉上可感知的变化。28这可能意味着在超强酸中没有发生放热反应，这与三氟甲磺酸一水合物的结果雅阁。最后一个要讨论的问题是一个相当大的阳极电流的原因，与烷烃氧化无关，
holes from the valence-band edge to the reducing agent in solution as is shown in Figure 10a. Without propane in solution, of course, the photogenerated holes will attack solvents directly. Smaller CD factors for alkanes other than propane can be explained by their lower hole-capture cross sections or smaller overlap of their fluctuating energy levels with Ti02 conduction-band edge. It seems to be of interest to compare the results in this acid solvent with those in fluorosulfonic acid (HS03F), one of the superacids. In the latter solvent, alkanes are known to be oxidized at a diffusion-controlled rate on Pt at less anodic potential than the potential where solvent oxidation starts.26,27 Therefore, the oxidation of alkanes in place of solvent oxidation is an exothermic reaction here. In addition, the oxidation is believed to involve the formation of an alkane radical which has a highly reducing ability. However, increase of photocurrents and any visually appreciable change were not found on the n-Ti02 before and after the solvent was purged with methane, ethane, or propane.28 This may imply no occurrence of an exothermic reaction in the superacid in accord with the result in triflic acid monohydrate. A final problem to be discussed is a cause for a sizable anodic current flow, not associated with alkane oxidation, on the re-