Clicked Isoreticular Metal–Organic Frameworks and Their High Performance in the Selective Capture and Separation of Large Organic Molecules

Abstract

Three highly porous metal-organic frameworks (MOFs) with a uniform rht-type topological network but hierarchical pores were successfully constructed by the assembly of triazole-containing dendritic hexacarboxylate ligands with Zn(II) ions. These transparent MOF crystals present gradually increasing pore sizes upon extension of the length of the organic backbone, as clearly identified by structural analysis and gas-adsorption experiments. The inherent accessibility of the pores to large molecules endows these materials with unique properties for the uptake of large guest molecules. The visible selective adsorption of dye molecules makes these MOFs highly promising porous materials for pore-size-dependent large-molecule capture and separation.

Template‐Directed Approach Towards the Realization of Ordered Heterogeneity in Bimetallic Metal–Organic Frameworks

“…Metal-organic frameworks (MOFs) are highly porous crystalline materials composed of metal ions or metal clusters coordinated to various organic linkers. [1] Thec hoice of these components not only demonstrates the tunability of these materials but also imparts unique functions for various applications including gas storage [2] and separation, [3] catalysis, [4] electrical devices, [5] sensors, [6] and biological applications. [7] In recent years,t he preparation of mixed-linker and/ or mixed-metal MOFs pioneered by Yaghi et al [8a-c] gained as ignificant amount of attention as the combination of different metals or organic linkers could introduce enhanced functions and complexity to the resulting MOF structures.…”

Fluorine‐Containing Silsesquioxane‐Based Hybrid Porous Polymers Mediated by Bases and Their Use in Water Remediation

“…In contrast, the microporous structure of FHPP-2 makes it easier to adsorb MB. [44] Figure 9a shows the equilibrium adsorption isotherms of FHPPsf or Pb 2 + .I tc an be seen that the two polymers exhibit high adsorption capacities for Pb 2 + ;t he experimental maximum adsorption capacities of FHPP-1 and FHPP-2 for Pb 2 + are 187 and 179 mg g À1 ,r espectively.A gain,t he experimental data were analyzed by using the Langmuir and Freundlich isotherm models (Figure 9b,c). The calculated values for both isotherm models are presentedi nT able 3a nd indicate that the Langmuir isotherm model is more suitable to describe the adsorp- tion behavior of the FHPPs towards Pb 2 + .A ccording to the Langmuir equation, the maximum adsorptionc apacities of FHPP-1 and FHPP-2 for Pb 2 + are 193 and 191 mg g À1 ,r espectively,w hich are close to the experimental maximum values.…”

Core–Shell Gold Nanorod@Metal–Organic Framework Nanoprobes for Multimodality Diagnosis of Glioma

“…[4a,11] In order to protect the Au core from aggregation, NMOFs, which are comprised of an infinite array of new materials such as organic linkers and metal ion clusters, are used as the shell. [6a,12] Unlike traditional shell material zeolites, which are comprised of SiO 4 or AlO 4 building blocks, the organic linkers in MOF may be readily varied to allow direct manipulation of biophysical properties for biomedical applications such as sensing, drug delivery,[6a,14] and imaging . Lin et al first recognized the potential of NMOFs as MRI T 1 ‐weighted imaging agents for biomedical imaging .…”