Study On The Preparation Of β-Ag₂CO₃ Nanoparticles And Application To The Hydroazidation Of Terminal Alkynes

As we all know,silver carbonate is a semiconductor material with unique electronic band structure,which is widely used in catalytic reactions and antibacterial materials.In recent years,we have studied and developed various methods for preparing silver carbonate,such as room-temperatureprecipitation,mechanochemicalsynthesis,ice-watermediated ion-exchange method.But in most cases,only It-Ag₂CO₃ with irregular shapes was obtained.More importantly,the particle size,shape,and crystal structure of the catalyst can greatly affect its catalytic performance.Therefore,exploring new synthesis methods and synthesizing homogeneous,stable,and better catalytic performance ofβ-Ag₂CO₃ nanocatalyst are very critical.In addition,alkenyl azide as an organic synthesis molecule can be used to construct nitrogen heterocyclic compounds and synthesize a variety of different structural molecular frameworks,such as amides,ketones,acridines,etc.,which has received extensive attentions from scientific researchers.At the same time,based on existing research results,the hydroazidation of alkynes is the most direct way to synthesize alkenyl azide.Therefore,it is necessary to prepare a suitable catalyst for making the conversion of reaction more economical and efficient.In this paper,we used the substitution method and the direct synthesis method to prepare uniform and stable silver carbonate nanoparticles,and explore the influence factors such as reaction temperatures,reaction time,and surfactants.By changing the synthesis routes and methods,we have prepared a variety of silver carbonate particles with different particle sizes.The spindle-shapedβ-Ag₂CO₃ nanoparticles prepared by the direct synthesis method have uniform size and good properties.When applied to the hydroazidation of terminal alkyne,it improves the efficiency of the reaction to a certain extent.