Supported vanadium oxides (V_xO_y) on hydrophobic poly(ionic liquid)s (PILs), for which the PILs were obtained by copolymerization of the ionic liquid (IL) 1‐hexadecyl‐3‐vinylimidazolium bromide and the cross‐linker divinylbenzene (DVB), are reported. The V_xO_y/PIL catalyst was characterized by different techniques, and the performance of the catalyst for the selective oxidation of benzene to phenol was studied with H₂O₂ as the oxidant. It was demonstrated that V_xO_y/PIL had much better catalytic performance than the analogous catalyst V_xO_y/P, prepared with the polymer support (P) obtained from DVB and vinyl imidazole, without the IL. The high activity and selectivity of the V_xO_y/PIL catalyst could be attributed to the incorporation of the IL during the polymerization, which endowed the V_xO_y/PIL catalyst with increased specific surface area, stronger absorbent ability, and more active sites than the smooth and bulky V_xO_y/P. Furthermore, the hydrophobic side chain of the IL in the catalyst was beneficial for the access of benzene and the removal of the generated phenol from the surface of the catalyst, which also played an important role in improving the catalytic performance of V_xO_y/PIL. Up to 13.4 % yield of phenol was achieved, with a high selectivity of 97.5 %. In addition, the catalyst could be easily separated and recycled at least three times without significant decline in the phenol yield.

中文翻译：

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疏水性聚离子液体上负载的VxOy作为将苯直接羟基化为苯酚的有效催化剂

疏水性聚离子液体（PIL）上负载的钒氧化物（V _x O _y），其通过离子液体（IL）1-十六烷基-3-乙烯基咪唑鎓溴化物和交联剂二乙烯基苯的共聚获得PIL （DVB）。用不同的技术对V _x O _y / PIL催化剂进行了表征，并以H ₂ O ₂为氧化剂研究了苯选择性氧化为苯酚的性能。结果表明，V _x O _y / PIL具有比类似催化剂V _x O _y更好的催化性能。/ P，用得自DVB和乙烯基咪唑的聚合物载体（P）制备，不含IL。V _x O _y / PIL催化剂的高活性和选择性可以归因于聚合过程中IL的掺入，这使V _x O _y / PIL催化剂具有增加的比表面积，更强的吸收能力和更高的活性比光滑大的V _x O _y / P的位置。此外，催化剂中IL的疏水侧链有利于苯的进入和从催化剂表面除去生成的苯酚，这在改善V _x O的催化性能方面也起着重要作用。_y / PIL。苯酚的收率高达13.4％，选择性高达97.5％。另外，该催化剂可以容易地分离和循环至少三遍，而苯酚的收率没有显着下降。