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Metal-ligand interactions play an important role in naturally occurring systems.For example,hemoglobin can bind oxygen efficiently by formation of coordination bond between iron-porphyrin called a heme and L-histidine.A variety of elaborate metallosupramolecules,from 2D polygons to 3D cages,prisms,and polyhedra,have been reported based on coordination-driven self-assembly.However to the best of our knowledge,the self-assembly of macroscopic materials through metal-ligand interactions has yet to be reported.