Research Progress on Metal-coordination-driven Self-assembly of 6,6"-Bis(2,6-dimethoxy-benzene)-terpyridine and Its Derivatives
In the past few decades,coordination-driven self-assembly of metal ions and organic ligands has been extensively applied in the construction of a variety of functional two-dimensional(2D)and three-dimensional(3D)structures.The major-ity of these structures are consisted of one type of ligand.Nevertheless,there have been sustained efforts dedicated to con-structing heteroleptic assemblies using various strategic methods in order to increase the complexity and sophistication of nano-scale structures.Heteroleptic assemblies involve the use of multiple types of ligands,to assemble metal ions into more intricate structures.This approach allows for the incorporation of different ligand geometries,charge densities,and functional groups,leading to increased structural diversity and potential for new properties.To achieve heteroleptic assemblies,various strategic methods have been employed.One common approach is the use of different ligands with complementary binding properties,allowing for the controlled formation of targeted structures.In recent years,6,6"-bis(2,6-dimethoxy-phenyl)-terpyridine and its derivatives have received considerable attention in the research of coordination-driven supramolecular self-assembly.These ligands exhibit strong self-recognition ability and effectively suppress the formation of by-products in multicomponent self-assembly processes,giving them unique advantages in the precise construction of metal-coordination supramolecular structures involving multiple ligands.A large number of 2D and 3D supramolecular structures formed by the coordination of 6,6"-bis(2,6-dimethoxy-phenyl)-terpyridine ligands and their derivatives with metal ions have been reported.The successful construction of these 2D and 3D topological structures has not only enriched the research of terpyridine met-al-coordination supramolecular structures but also demonstrated significant research value and broad prospects in fields such as luminescent materials,host-guest chemistry,drug delivery systems,and confined catalysis.Based on this,this review sys-tematically summarizes the latest progress in the self-assembly of derivative ligands based on 6,6"-bis(2,6-dimethoxy-phenyl)-terpyridine in terms of ligand synthesis,structure construction and property study,and briefly discusses the current development opportunities and challenges faced in this field.
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