Dimension Control in Mixed Linker Metal–Organic Frameworks via Adjusting the Linker Shapes

Abstract

In this context, we describe a novel method to control the dimensionality and, further, the morphology in three mixed linker metal−organic frameworks (MOFs) TMU-70, TMU-71, and TMU-49 via altering the linker shapes. The compatibility between the shape of linkers used in the mixed linker framework, specifically linker angles, can directly affect the dimensionality of the resulting networks from 2D to 3D. Using incompatible linkers (one bent and one linear) together with binodal SBU directed the structure to form 2D networks, while 3D networks were obtained through applying linkers with the same shape. Further, the 2D and 3D MOFs were fabricated through the coordination modulation strategy. The impact of various modulators on the size and morphology of the structures has been examined. The 2D MOFs produced only nanorods through application of different capping agents owing to their preferred crystal growth, while the 3D networks led to rod and plate morphologies. Also, the catalytic performance of MOFs in an aldol-type condensation reaction was estimated. High and fast catalytic activity is detected in nanoscale rod-shaped catalysts.

Lanthanide Isophthalate Metal‐Organic Frameworks: Crystal Structure, Thermal Behavior, and White Luminescence

“…In this context, we focus our attention on an inexpensive commercially available organic ligand, namely 1,3-benzenedicarboxylic acid, or isophthalic acid, and water as solvent. This common linker is a rigid carboxylate ligand which enables various coordination modes to build MOF network, [27][28][29][30][31] and which gets an appropriate triplet excited-state energy (27900 cm À 1 ). [32] Herein, we report the synthesis of two new isomorphous 3D lanthanide-bearing metal-organic frameworks built up from isophthalate (1,3-BDC), with the chemical composition Ln 1.14 Na 0.57 (BDC) 2 (H 2 O) • 4H 2 O (Ln=La 3 + or Ce 3 + ).…”

Acyl amide-functionalized and water-stable iron-based MOF for rapid and selective dye removal

“…Metal-organic frameworks (MOFs) are a remarkable branch of coordination networks invented by linking metal ions and multitopic organic moieties through strong bonds. 14,15 Various types of metal rods and countless designable organic ligands as well as different types of linking 16 of secondary building units (SBUs) offers a very significant ability to design desirable MOFs showing ultrahigh surface area, chemical stability and tunable pores for specific applications. 17,18 Due to these properties, the MOFs have received great attention in different areas such as gas sorption 19 and separation, 20 catalysis 21 and air/water purification.…”

Multi‐Component Metal‐Organic Frameworks Significantly Boost Visible‐Light‐Driven Hydrogen Production Coupled with Selective Organic Oxidation

“…The diversity of the building blocks of orderly frameworks can afford high‐density photoactive sites allowing the organic ligands being linked together and well isolated by the metal ions, meanwhile avoiding the self‐quenching of high‐density ligands to increase the light harvest ability [16–18] . As MOFs can be synthesized via a multivariate (MTV) strategy, [19–23] different photoactivity ligands within one single MOF can afford a multifunctional heterogeneous photocatalyst, [24–29] which could fully reflect the advantages of two types of ligands. Herein, the combination of multiple components within a single MOF [30] was a powerful way to achieve efficient conversion of photocatalytic hydrogen production coupled with selective oxidation of amines.…”