Synthesis Of Low-Dimensional Supramolecular Complexes For Catalysis And Humidity Sensitivity

In recent years,supramolecular complexes have been drawing much attention as a new type of material.The design,synthesis,structure and properties of complex materials have become hot topics.Compared to various catalyst materials such as MOFs,noble metal catalysts,metal oxides,carbon materials,nanomaterials,and ceramic materials,the synthesis process of complex materials is simple,easily repeatable,and cost-effective,making them an excellent material widely used.It is precisely because of the good structure adjustability and processing properties of complexes that they exhibit excellent catalytic activity and wet sensitivity.Therefore,we designed and synthesized seven different complex materials by regulating the ligand and metal sites,and verified their performance.These materials can efficiently catalyze CO₂ ring addition reactions and Knoevenagel condensation reactions,with strong catalytic activity and advantages in wet-sensitive fields,providing a new strategy for subsequent work.The specific research contents are as follows:（1）By the strategy of ligands substitution,Zn and Cu-based low-dimensional supramolecular complexes were designed and synthesized to explore their catalytic performance in CO₂ cycloaddition reaction and Knoevenagel condensation reaction.The experimental results reveal that 0D complex materials have more supramolecular numbers than 1D complex materials,and form more stable molecular structures under supramolecular force.（2）By controlling the metal active sites,Mn and Co-based 0D supramolecular complexes were designed and synthesized to explore their catalytic performance in CO₂ cycloaddition reactions.The experimental results show that the catalytic performance of 0D three-nuclear complexes are superior to that of single-nuclear complexes.The expansion of the metal active center of the complexes enhance the Lewis acid site,and exhibit excellent catalytic performance in CO₂ cycloaddition reactions,with better reaction conditions.（3）The catalytic performance of a novel Cd-based 0D supramolecular complex in Knoevenagel condensation reaction and its application in the field of humidity detection were studied,further expanding and verifying the catalytic performance and application ability of 0D complex catalyst.The experimental results show that compared to reported catalysts,the reaction conditions are within the expected range.In addition,we also conducted humidity sensitivity tests,and the material based on the complex exhibited excellent performance in the range of 11%RH-97%RH.This high-performance sensor has great potential for application.