Direct knitting privileged molecular catalysts into recyclable single-site catalysts with enhanced activity
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摘要:
An ideal strategy for catalyst immobilization is taking advantage of the widely well studied homogeneous molecular catalysts and transforming them directly into highly efficient and recyclable heterogeneous catalysts.However,the obtained heterogeneous catalysts often have inferior activity due to altered chemical environment around active centers and decreased mass/heat transfer [1,2].Porous materials have been regarded as promising scaffold for catalyst immobilization due to their intrinsic porosity and high Brunauer-Emmett-Teller (BET) specific surface areas.However,for most metal-containing porous materials (MCPPs) [3],ligands/complexes have to be carefully designed and modified,which not only increase the cost and difficulty of the immobilization but may also compromise the intrinsic activity of the molecular catalyst.Therefore,how to keep or even enhance the activity of the immobilized catalysts via a simple and direct method is a crucial bottleneck in catalyst immobilization.