Several Examples Of The Synthesis Of Palladium-supported Organic Porous Materials And The Study Of Their Catalytic Properties

Porous polymer materials are the best choice for metal catalyst carriers due to their simple synthesis,good stability and porous properties.Their application in heterogeneous catalysis has always been the focus of scientists.In this paper,we prepared a variety of palladium-loaded porous polymer materials by in-situ one-pot method,post-synthesis and pre-synthesis of functionalized ligands,and studied them for heterogeneous catalysisⅠ.We synthesized a new Pd NPs and imidazolium salt ionic liquid(IM-IL)modified porous organic polymer Pd@ PTC-POP,and in the process of forming POP by Pd-catalyzed Suzuki-Miyaura cross-coupling reaction Bits generated Pd NPs are loaded in the POP material.The synthesized Pd@ PTC-POP is a highly active phase transfer catalyst capable of promoting the Sonogashira cross-coupling reaction in the aqueous phase,with excellent yield and appreciable range of use,and can be reused 5 times without significant loss of catalytic activityⅡ.We synthesized a porous organic polymer(Im-POP)based on imidazolium salt,and sequentially treated it with Pd(OAc)2 in toluene solution and NaBH4 aqueous solution,and loaded Pd NPs on Im-POP,which was recorded as Pd@ Im-POP Then we used the POP material as a catalyst to carry out preliminary catalytic experiments on the Suzuki reaction.The research proves that our Pd@ Im-POP material has excellent catalytic effect(98.5%yield in 2 h)and can be reused at least three times.There is almost no loss of catalytic activityⅢ.We synthesized Pd(Ⅱ)(R-NC)2 metal organic ligand L by multi-step reaction using 4-bromoaniline as raw material.Subsequently,we prepared a porous polymer([Pd(Ⅱ)(R-NC)2]-Polymer)derived from a Pd(Ⅱ)(R-NC)2 metal organic ligand by reacting the ligand L and the trimesoyl hydrazide in a mixed solvent of 1,3,5-trimethylbenzene/1,4-dioxane.The synthesized[Pd(Ⅱ)(R-NC)2]-Polymer materials were characterized by PXRD,FT-IR,SEM,TEM,TGA,BET,etc.,which proved their good crystallinity,thermal stability and Porous natureBased on the above three parts,we designed and synthesized a variety of palladium-loaded porous polymer materials by various synthetic preparation methods,and proved that they have good stability and excellent heterogeneous catalytic performance...