The development of heterogeneous chiral metal catalysts which maintain efficiency and stability in the aqueous phase is significant for applications in many industries. On the basis of a series of polymer ionic liquids (PILs) that contain coexisting Cl^– and [NTf₂]⁻ anions, the stable heterogeneous chiral Ru catalysts with controllable hydrophobic surface were successfully prepared. PIL-functionalized structure ensured that the catalysts could be well dispersed as micelles in a pure water medium, and enhance the adsorption of organic substrate, thereby significantly improving the reactivity in water. The catalyst successfully catalyzed the asymmetric hydrogenation transfer reaction of alkyl ketones in water with high activity and selectivity. Importantly, the catalyst can be easily and efficiently recovered and recycled at least nine times without significant loss of activity and enantioselectivity. This formation of a catalyst from PIL could provide an important approach to the design of environmentally friendly catalysts and the development of green reactions in the water.

中文翻译：

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基于聚合物离子液体的稳定手性钌配合物催化剂用于水中脂肪族酮的不对称转移加氢

在水相中保持效率和稳定性的非均相手性金属催化剂的开发对于许多行业中的应用而言具有重要意义。在一系列的包含共存的氯聚合物的离子液体（比尔森）的基础上^-和[NTF ₂ ] ^-阴离子，成功制备了具有可控疏水表面的稳定的多相手性钌催化剂。PIL官能化的结构确保了催化剂可以作为胶束很好地分散在纯水介质中，并增强了有机底物的吸附，从而显着提高了在水中的反应性。该催化剂以高活性和高选择性成功地催化了烷基酮在水中的不对称加氢转移反应。重要的是，该催化剂可以容易且有效地回收和循环至少九次，而不会显着损失活性和对映选择性。由PIL形成的催化剂可为设计环保催化剂和开发水中绿色反应提供重要途径。