An easy, effective, and reversible strategy for tuning the Krafft temperature (K_T) of selenium-containing ionic surfactants, with head groups ranging in nature from anionic to amphoteric, has been achieved for the first time via the redox chemistry of selenium. After oxidation with H₂O₂, the selenide group was converted to a more hydrophilic selenoxide group. This made the oxidized forms of the surfactants more water-soluble, which results in a marked reduction in the K_T. In contrast, the hydrophilic selenoxide was restored to its reduced form of selenide via reduction reaction, which allowed the K_T value to return to its initial value. By alternating the oxidization and reduction treatments, the K_T of the selenium-containing surfactants in this work could be reversibly switched over 5–10 cycles without causing obvious adverse distortions.

中文翻译：

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氧化还原化学法对含硒离子表面活性剂的可逆调谐Krafft温度

通过硒的氧化还原化学方法，首次实现了一种简便，有效且可逆的调节含硒离子表面活性剂的Krafft温度（K _T）的策略，其头基的范围从阴离子到两性。在用H ₂ O ₂氧化后，硒化物基团转化为更亲水的硒氧化物基团。这使得表面活性剂的氧化形式更易溶于水，从而导致K _T显着降低。相反，亲水性亚硒酸盐通过还原反应被还原成硒化物的还原形式，这使得K _T值以返回其初始值。通过交替进行氧化和还原处理，这项工作中含硒表面活性剂的K _T可以可逆地切换5-10个循环，而不会引起明显的不利变形。