Precise Modulation of the Breathing Behavior and Pore Surface in Zr‐MOFs by Reversible Post‐Synthetic Variable‐Spacer Installation to Fine‐Tune the Expansion Magnitude and Sorption Properties

Abstract

To combine flexibility and modifiability towards a more controllable complexity of MOFs, a post-synthetic variable-spacer installation (PVSI) strategy is used to implement kinetic installation/ uninstallation of secondary ligands into/from a robust yet flexible proto-Zr-MOF. This PVSI process features precise positioning of spacers with different length, size, number, and functionality, enabling accurate fixation of successive breathing stages and fine-tuning of pore surface. It shows unprecedented synthetic tailorability to create complicated MOFs in a predictable way for property modification, for example, CO2 and R22 adsorption/separation, thermal/chemical stability, and extended breathing behavior.

Retracted: 3D Porous Heterometallic Coordination Polymer for the Detection of Nitroaromatic Explosives and Inhibiting Human Cancer Cells Growth

“…During the past few decades, metal‐organic frameworks (MOFs) have experienced a explosive growth and have received more and more attention motivated by their potential applications in luminescence sensing, heterogeneous catalysis, gas adsorption and separation, magnetism and so on . In recent years, porous MOFs with high luminescence intensity have been widely used as luminescence probes for the detection of volatile organic solvent molecules and nitroaromatic explosives .…”

Retrofitting metal-organic frameworks

“…In the most general definition, retrofitting of a MOF describes the post-synthetic installation of additional linkers between undercoordinated metal nodes or between open metal sites (OMSs) of a MOF 21 . Subsequently, retrofitting has been discovered as a powerful approach to manipulate macroscopic physicochemical properties such as the mechanical robustness, the thermal expansion behavior and responsivity of flexible MOFs to guest adsorption 21–23 . In a typical retrofitting experiment, a MOF with guest accessible OMSs or labile monotopic ligands is exposed to a molecule with at least two available coordination sites such as nitrile or carboxylate groups.…”

Thermochromic Behavior of Azobenzene‐based Coordination Polymer with Reversible Breathing Process

“…Stimuli‐responsive materials have aroused intense interest due to their potential applications in molecular devices (such as chemical switches, sensors, and memory devices) . They can tune their physical properties with the external stimulation, for instance, pressure, temperature, pH, light or X‐ray and electric/magnetic field.…”