Supramolecular self-assembly has always been one of the central subjects within supramolecular chemistry. With the aim to build the higher-order assemblies with the desired functioanlity, hierarchical self-assembly involving coordination interactions has been recently explored to construction of functional supramolecular systems in our group. By taking advantages of orthogonal nature of metal-ligand bond with other no-covalent interactions such as CH-π interactions, π-π stacking, hydrogen bonding, hydrophobic/hydrophilic interactions, etc, a series of stimuli-responsive nanostructures and functional materials have been successfully obtained through hierarchical self-assembly involving coordination interactions. For example, from the 120° pillar[5]arene containing dipyridyl precursor, a new class of multiple stimuli-responsive polymer gels were obtained via hierarchical self-assembly involving metal-ligand coordination and host-guest interactions (Figure 1). In addition, through combination of the π–π stacking, CH-π interactions, and hydrogen bonds of the periphery dendrons as well as coordination interactions, the ordered vesicle-like nano-structures were generated via hierarchical self-assembly from 120° dipyridyl building blocks decorated with poly(benzyl ether) dendrons as well as 120° di-Pt(II) acceptors, which featured bromide triggered encapsulation and release behavior. Notably, the first example of the branched rotaxane dendrimers up to the fourth generation was successfully realized as well by using the similar strategy.

Stimuli-responsive functional materials via hierarchical self-assembly involving coordination interactions

254th National Meeting (2017)

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