The Luminescence Properties And Supyamolecular Self-assembly Of Multifunctional Pyrazolyl Organic Ligands

Supramolecular chemistry is defined as "chemistry above the molecule" because its purpose is to design and realize a functional chemical system based on molecular components combined together by non-covalent intermolecular forces.In recent years,the design and synthesis of supramolecular coordination compounds have become a very active field not only because of their interesting skeleton structure and topological structure,but also because of their potential applications in luminescence,catalysis,magnetism,and ion exchange.Although previous studies have reported a large number of supramolecular coordination compounds with interesting structures and excellent properties,it is still a challenge to explore effective design and synthesis strategies to prepare supramolecular coordination compounds with expected structures and properties.In this thesis,we designed and synthesized a variety of pyrazole multifunctional ligands using binaphthol and anthracene as the skeleton,and studied the properties of multifunctional ligands in fluorescence sensing,and obtained several interesting results.Furthermore,a series of metallosupramolecular complexes with novel structures were synthesized by reacting the multifunctional ligands with dimetallic corners through the programmed hierarchical self-assembly approach.In the second chapter,a series of anthryl dipyrazole multifunctional ligands were designed and synthesized successfully.These ligands were characterized by nuclear magnetic resonance and mass spectrometry.Interestingly,these anthryl-dipyrazole ligands display the ability to recognize metal ions with high selectivity.it is worth mentioning that these anthryl dipyrazole ligands can be used as a fluorescent probe to identify mercury ions with good selectivity,high sensitivity.In the third Chapter,we designed and synthesized chiral organic ligands dipyrazole with a binaphthol skeleton,and anthrylpyrazole-based multifunctional ligands including pyridinyl-anthrylpyrazole cyano-anthrylpyrazole,carboxyl-anthrylpyrazole.These compounds are characterized by nuclear magneticresonance.Through metalcoordination-driven self-assembly,these multifunctional ligands were assembled and coordinated with transition metals in water and acetone system,to form metal-organic supramolecular complexes.These complexes were characterized by nuclear magnetic resonance,mass spectrometry,and their structures were determined by X-ray single crystal diffraction.