![]() Herein, we describe a nanoscale transformation that uses thermal response to create an organic-metallic cage out of macrocyclic building blocks. The development of controlling macrocycle structure and related assembly structure is still ongoing. Currently, macrocycles are often assembled in fixed forms. It is noteworthy that ligand modulation typically necessitates premodification, laborious synthesis, and/or guest addition in metal–organic self-assembly (such as metal–organic cages) 7, 19, 49, 52, 53, 54, 55, 56, 57, 58, 59. Massive coordination cages and their potential applications have drawn a lot of attention, but corresponding approaches still have to be developed 47, 48, 49, 50, 51. These coordination cages are prospects for advanced functional materials due to their large interior volume, regulated cavity environment, and high porosity. Macrocycles have recently become a popular building element for creating metal–organic cages. Achieving heating-induced interconversion control between three or more different stiff isomers of artificial systems is still challenging 3, 12, 28, 34. ![]() ![]() However, some biomacromolecules have been found to have more than two distinct stable or metastable folding configurations. Some examples of thermal-induced conversion between two forms are achieved 28, 34, 35. Additionally, it is used as a slipping technique in the production of rotaxane 17, 27, 33. The temperature response in particular is a typical occurrence in biological systems. Functional macrocycles with stimulus responses are frequently used for catalysis 4, 22, 29, drug delivery 9, 19, 21, 24, substance separation 4, 24, 30, adsorption 5, 20, and recognition 9, 10, 21, 31, 32. Responses to environmental stimuli are essential for changing these systems’ particular architecture and associated features 7, 8, 9, 10, 11, 12. In both live organisms and artificial systems, macrocycles are crucial to the construction of self-assembling structures 1, 2, 3, 4, 5, 6.
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