Although gas expanded liquids (GXLs) were introduced at the beginning of the twentieth century, it was nearly a century later that they received renewed attention as a possible reactant medium offering not only a mechanism for subsequent controlled separation of products but also the tunability of the reaction itself. Early work showed that one could also control the cybotactic structure—that is, the relative average orientation of the solvent in a local environment around the reacting solutes—in GXLs with CO₂ as a cosolvent and, thereby, preferentially favor desired product pathways. Such properties have been demonstrated in more general solvent mixtures and in confined environments since then. Here, we further demonstrate that the dynamics and relaxation of solutes in cybotactic regions of GXLs can exhibit a range of properties that include those that would be expected from a glassy environment. This extends the range of controllable (or tunable) properties available to GXLs for reaction control.

中文翻译：

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气体膨胀液体的同化区域中的溶剂化动力学：十年之后

Although gas expanded liquids (GXLs) were introduced at the beginning of the twentieth century, it was nearly a century later that they received renewed attention as a possible reactant medium offering not only a mechanism for subsequent controlled separation of products but also the tunability of the reaction itself. Early work showed that one could also control the cybotactic structure—that is, the relative average orientation of the solvent in a local environment around the reacting solutes—in GXLs with CO₂作为助溶剂，因此优先有利于所需的产品途径。从那时起，这种性质已在更通用的溶剂混合物和密闭环境中得到证明。在这里，我们进一步证明，GXL的壶律区域中溶质的动力学和弛豫可以表现出一系列特性，其中包括从玻璃状环境中可以预期到的特性。这扩展了GXL用于反应控制的可控制（或可调）属性的范围。