The development of heterogeneous catalysts with substrate shape,size or electronic constitution selectivity is a huge challenge in photocatalysis.Reported herein is a host-guest interaction strategy to endow photocata...The development of heterogeneous catalysts with substrate shape,size or electronic constitution selectivity is a huge challenge in photocatalysis.Reported herein is a host-guest interaction strategy to endow photocatalysts with special selectivity.By adjusting the precursors,conjugated macrocycle polymers(CMPs)with pillar[5]arene struts(CMP-1 and CMP-2)and a corresponding non-pillar[5]are necontained conjugated organic polymer(COP-1)were prepared and the photocatalytic activities toward sulfide derivatives were investigated.The sulfides showed similar conve rsions when COP-1 was used as a photocatalyst,but exhibited significant differences when it turned to the CMPs.Remarkably,the conversion yield of S-1 achieved near 18 folds over the one of S-2 when CMP-2 was used as a catalyst.Mechanism studies confirmed that the"host-guest"effect of pillar[5]arene struts in CMPs was the main cause of the difference.The present work establishes CMPs as novel heterogeneous photocatalysts with substrate selectivity,and such a method will inspire the researchers concerning preparation of heterogeneous catalysts with excellent selectivity.展开更多
基金Shanghai Sailing Program(No.19YF1452900)National Key Research and Development Program of China(No.2017YFA0206500)+1 种基金Science and Technology Commission of Shanghai Municipality(No.18DZ1100403)the National Natural Science Foundation of China(No.21871281)。
文摘The development of heterogeneous catalysts with substrate shape,size or electronic constitution selectivity is a huge challenge in photocatalysis.Reported herein is a host-guest interaction strategy to endow photocatalysts with special selectivity.By adjusting the precursors,conjugated macrocycle polymers(CMPs)with pillar[5]arene struts(CMP-1 and CMP-2)and a corresponding non-pillar[5]are necontained conjugated organic polymer(COP-1)were prepared and the photocatalytic activities toward sulfide derivatives were investigated.The sulfides showed similar conve rsions when COP-1 was used as a photocatalyst,but exhibited significant differences when it turned to the CMPs.Remarkably,the conversion yield of S-1 achieved near 18 folds over the one of S-2 when CMP-2 was used as a catalyst.Mechanism studies confirmed that the"host-guest"effect of pillar[5]arene struts in CMPs was the main cause of the difference.The present work establishes CMPs as novel heterogeneous photocatalysts with substrate selectivity,and such a method will inspire the researchers concerning preparation of heterogeneous catalysts with excellent selectivity.
