| Host-guest chemistry,as an important subject of supramolecular chemistry,has received tremendous attention and made significant progress since its discovery several decades ago.With its unique advantages such as specific recognition and stimulus responsiveness,host-guest chemistry has been widely applied in important research fields such as organic catalysis,chemical sensing,and biological imaging.Although plenty of achievements have been made in artificial host-guest systems,they are still difficult to compare with natural supramolecular systems(such as neurotransmitter systems),which are more efficient,accurate,and feature-rich.Hence,the establishment of novel artificial host-guest systems is still a research hotspot in the field of supramolecular chemistry.Among various artificial host-guest systems,supramolecular clipping systems(SCSs)have been a focus of attention.Molecular tweezers,the hosts of SCSs,can effectively encapsulate guests with the help of multiple non-covalent interactions(including hydrogen binding,π-π stacking,and metal-metal interactions,etc.).In addition,short-range discrete host-guest complexes can be transformed into long-range ordered assemblies via self-assembly strategies,rendering the integration and amplification of optical signals and chiral properties.In this way,we can get a deeper understanding of the recognition and assembly mechanisms in biological systems.In this dissertation,we constructed new SCSs by utilizing cyclometalated gold and platinum-based compounds as building blocks and multiple non-covalent effects as binding forces.We will conduct in-depth studies on the optical,chiral,and other characteristic signals generated by the process of molecular recognition and aggregation assembly in SCSs,and explore the transfer process and corresponding regulation mechanisms behind these signals.Besides,we will discuss the application prospects of SCSs in fields of functional material(such as phosphorescent luminescent materials and chiral separation materials). |
