A Cerium‐Containing Metal‐Organic Framework: Synthesis and Heterogeneous Catalytic Activity toward Fenton‐Like Reactions

Abstract

A cerium‐based metal‐organic framework, namely MOF‐589, was synthesized using benzoimidephenanthroline tetracarboxylic acid (H4BIPA‐TC) as an organic linker. Full characterization including single‐crystal and powder X‐ray diffraction analysis, thermogravimetrical analysis, scanning electron microscopy, and N2 adsorption measurements at low pressure and 77 K were carried out. The material was employed as an efficient heterogeneous catalyst for decomposition of methylene blue (MB) dye (40 ppm) in the presence of H2O2 in 15 minutes. Interestingly, comparison studies showed that the activity of MOF 589 was higher than that of other iron‐based heterogeneous and cerium‐based catalysts. Further experiments to clarify the MOF 589 activity indicated that the BIPA‐TC linker might have an important impact through a cooperative effect on the metal cluster. Control studies confirmed that the presence of catalyst was necessary for the reaction to occur and the catalyst recyclability. In particular, catalysis from leached cerium in the reaction filtrate is unlikely and the solid material could be reused at least eight times without a remarkable loss in activity.

Construction of Naphthalenediimide Lanthanide(III)‐MOFs and Composites Incorporated Electron‐Rich Pyrene Derivative as Multifunctional Fluorescence Sensing for Nitro Aromatic Compounds and Aldehydes

“…The 3D framework structure of the complex 1 has been simplified, and ligand BINDI and SBU were simplified to 4-connected nodes, respectively. By the TOPOS5.0 program, the overall structure can be simplified as a 4-c lvt-type net from the c-axis direction and the point symbol is {4 Actually, some Ln-MOFs based on the H 4 BINDI ligand have been reported, [30][31][32][33] whereas, the crystal structures of complexes 1-4 are different from them in terms of coordination environment of metal centers and linking patterns of the ligand. Here, the crystal structures of these Ln-MOFs are compared from various aspects.…”

“…Actually, some Ln‐MOFs based on the H 4 BINDI ligand have been reported, [ 30‐33 ] whereas, the crystal structures of complexes 1 — 4 are different from them in terms of coordination environment of metal centers and linking patterns of the ligand. Here, the crystal structures of these Ln‐MOFs are compared from various aspects.…”

“…Although the coordination number of metal centers is nine, the coordination environments of metal centers are different. Furthermore, the ligand of the complex 1 displays different connection fashions compared with MOF‐589, [ 30 ] MOF‐590, [ 31 ] and MOF‐592, [ 31 ] but the same as those of Eu‐BINDI and 1‐Eu. [ 32 ] Due to the difference in the coordination environment of metal atoms and linking pattern of ligand, the structures of complex 1 and literatures present different packing structures.…”

“…Chemically stable NDI has high electron affinity and excellent charge carrier mobility, [ 16‐17 ] thus, NDI based MOFs might serve as an electron‐deficient host to realize high emission when appropriate guest is introduced to form host‐ guest MOFs. [ 18‐19 ] Among NDIs derivatives, the electron‐deficient H 4 BINDI has been coordinated with different types of metals including alkali earth metals Mg, [ 20‐21 ] Ca, [ 21‐22 ] Sr, [ 21,23 ] Ba, [ 24 ] transition metals Co, [ 25 ] Ni, [ 26 ] Cu, [ 27‐28 ] Zn, [ 24,29 ] Cd, [ 24 ] , and rare earth metals Ce, [ 30 ] Nd, Tb, [ 31 ] and Eu, [ 32‐33 ] to construct various configurations of MOFs. Unfortunately, as far as we know the incorporation of electron‐rich species in MOFs based on electron‐deficient H 4 BINDI and as fluorescent sensors has not been reported.…”

A metabolic intervention strategy to break evolutionary adaptability of tumor for reinforced immunotherapy

“…Fortunately, cerium-based metal–organic framework (CeMOF) with high porosity and large surface area can be employed as a carrier for LOX immobilization 18 , 19 , 20 . Furthermore, CeMOF with oxidase-like activity converts H 2 O 2 (the by-product of lactate oxidation) into hydroxyl radicals (·OH) in acidic TME 21 , 22 . Therefore, such lactate targeted metabolite intervention contributes to the TME reprogramming, as well as the nanocytalytic reactions for reactive oxygen species (ROS) mediated immunogenic tumor cell death (ICD) ( Fig.…”