“…A family of dynamic coordination polymers (CPs) including metal–organic frameworks (MOFs) with corresponding stimuli-responsive structures − has been recently emerged as a new generation of “smart” artificial materials for diverse application. − In terms of crystal engineering, the general principles to design such materials are based on utilization of flexible and/or photochromic ligands, , catenane or rotaxane components, , single coordination bonds, and/or hinge coordination, as well as introducing the weak intermolecular interactions either through one- (1D) and two-dimensional (2D) structure, , or linker functionalization with dispersion energy donating groups. , The response of the resulting structure to external stimuli − such as temperature, pressure, guest molecules, electric/magnetic field, and light can manifest itself as a phase transitions between two or more distinguished crystal structures ,, or within the same space group, ,, associated generally with ligand deformations, conformations and breathing . Intriguing is that the dynamic and reversible structural behavior of such structures is expressed in the form of a change in their optical, chemical, magnetic and dielectric properties, and, hence, formed the basis of smart separators, molecular machines, , and data processing systems. , However, the steric hindrance effect, limiting the rates of structural transformations, k , up to several s –1 at ambient conditions for the most available dynamic CPs and MOFs, as well as irreversible structural distortion, appearing during the large number of transformation cycles, are still a challenge for future application of dynamic CPs in real-case scenario.…”