Synthesis of Two Triarylboron-Functionalized Metal–Organic Frameworks: In Situ Decarboxylic Reaction, Structure, Photoluminescence, and Gas Adsorption Properties

Abstract

Two 3D noninterpenetrating porous metal-organic frameworks (PMOFs) [Cd3(L(1))2(DMA)2]·DMA [1, H3L(1) = tris(p-carboxylic acid)tridurylborane] and [Zn3(L(2))3(H2O)2]·5H2O·2EtOH [2, H2L(2) = 4,4'-((2,3,5,6-tetramethylphenyl)boranediyl)bis(2,3,5,6-tetramethylbenzoic acid)] were synthesized by employment of a C3-symmetric ligand (H3L(1)) to assembly with Cd(NO3)2 or Zn(NO3)2. Complex 1 exhibits a (3, 6)-connected topological network based on a Cd3 cluster and Y-shaped trinodal organic linker. Complex 2 shows a 6-connected topology, since in situ decarboxylic reaction of the initial H3L(1) occurred to generate a new ligand, H2L(2), which can be considered as a linear linker. Both 1 and 2 exhibit blue fluorescence. Significantly, complex 1 with larger channels is unstable upon the removal of guest molecules. In contrast, activated 2 exhibits higher stability and permanent porosity.

Pentiptycene-Based Luminescent Cu (II) MOF Exhibiting Selective Gas Adsorption and Unprecedentedly High-Sensitivity Detection of Nitroaromatic Compounds (NACs)

“…Continuing our previous work by use of rigid tetracarboxylate ligands ( Fig. 1a,b ) to construct porous MOFs 36 37 38 39 40 , we further extended the central anthracene core to pentiptycene core to synthesize a new pentiptycene-based tetracarboxylate ligand, H 4 L ( Fig. 1c ).…”

Halogenated triarylboranes: synthesis, properties and applications in catalysis

“…76,77 Wet solvents have been shown to decompose the bench stable salt Na[B(3,5-Cl2C6H3)4] to afford B(3,5-Cl2C6H3)3, as the typical synthetic methods of using Grignard reagents or organolithium species were unsuccessful for its preparation. 78 Triarylboranes with bromine or iodine atoms are observed to be air stable and are commonly used as linkers for the preparation of metal organic frameworks (MOFs), [79][80][81][82][83][84][85][86][87] in fluorescent materials, 72,[88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103] or as catalysts. 104,105 72,88-103104,105 Scheme 4: Synthesis of B(2,6-(OMe)2C6H3)3 and subsequently B(3-Br-2,6-(OMe)2C6H2)3.…”

Two d10 metal–organic frameworks based on a novel semi‐rigid aromatic biscarboxylate ligand: Syntheses, structures and luminescent properties

“…The average Zn‐O distance is 1.995 Å, and the bond angles of O‐Zn‐O and O‐Zn‐N vary from 99.24(10) to 129.32(10)° and 92.38(10) to 119.75(11)°, respectively, which is in agreement with those found in the literature published previously. [ 120–122 ] To generate a 3D framework, a pair of RGAA ligands link three Zn (II) atoms, which adopts μ 3 ‐ η 1 : η 1 : η 1 : η 0 coordination mode (Scheme 2a). On the other hand, each BPY ligand links two Zn (II) atoms, which makes use of μ 2 ‐ η 1 : η 1 : η 0 : η 0 coordination mode by Zn‐N coordinated bonds (Figure 1b).…”