Biomimetic mineralization of nitrile hydratase into a mesoporous cobalt-based metal–organic framework for efficient biocatalysis

Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 967-972 ◽  
Author(s):  
Xiaolin Pei ◽  
Yifeng Wu ◽  
Jiapao Wang ◽  
Zhiji Chen ◽  
Wen Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Nitrile Hydratase ◽  
Metal Organic Framework ◽  
Catalytic Efficiency ◽  
Biomimetic Mineralization ◽  
Metal Organic ◽  
Organic Framework

Recombinant cobalt-type NHase was encapsulated into ZIF-67 to improve its thermal stability and catalytic efficiency by a biomimetic mineralization strategy.

Porous homo- and heterochiral cobalt(II) aspartates with high thermal stability of the metal-organic framework

2010 ◽  
Vol 59 (4) ◽  
pp. 733-740 ◽  
Author(s):  
M. P. Yutkin ◽  
M. S. Zavakhina ◽  
D. G. Samsonenko ◽  
D. N. Dybtsev ◽  
V. P. Fedin
Keyword(s):  
Thermal Stability ◽  
Metal Organic Framework ◽  
High Thermal Stability ◽  
Metal Organic ◽  
Thermal Stability Of ◽  
Organic Framework

Topotactic elimination of water across a C–C ligand bond in a dense 3-D metal–organic framework

2014 ◽  
Vol 50 (87) ◽  
pp. 13292-13295 ◽  
Author(s):  
Hamish H.-M. Yeung ◽  
Monica Kosa ◽  
John M. Griffin ◽  
Clare P. Grey ◽  
Dan T. Major ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Metal Organic Framework ◽  
Structural Flexibility ◽  
Metal Organic ◽  
Ligand Bond ◽  
Organic Framework

Owing to its thermal stability and structural flexibility, the original 3-D framework of lithium l-malate remains intact upon topotactic dehydration.

A Novel (3,4,9)-Connected 3D Metal–Organic Framework Based on the Non-Planar Tricarboxyl Tecton and Zn5O4-Cluster SBU

2015 ◽  
Vol 68 (1) ◽  
pp. 161 ◽  
Author(s):  
Zhuo-Wei Wang ◽  
Hui Zhao ◽  
Min Chen ◽  
Min Hu
Keyword(s):  
Thermal Stability ◽  
Benzoic Acid ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Crystalline Material ◽  
Tripodal Ligand ◽  
Secondary Building Units ◽  
Metal Organic ◽  
Organic Framework

Combination of a non-planar tripodal ligand 3,4-bi(4-carboxyphenyl)-benzoic acid (H3L) and Zn5O4-cluster secondary building units affords a highly connected three-dimensional metal–organic framework, {[Zn5(μ3-OH)3(μ2-OH)L2(H2O)2](H2O)2}n (1), which exhibits an unusual (3,4,9)-connected (42.5)(3.43.52)(32.45.511.613.73.82) topological net. The thermal stability and solid luminescence of the crystalline material have also been investigated.

scholarly journals Microwave-Assisted Synthesis of the Flexible Iron-Based MIL-88B Metal-Organic Framework for Advanced Energetic Systems

2021 ◽  
Author(s):  
Mahmoud Y. Zorainy ◽  
Serge Kaliaguine ◽  
Mohamed Gobara ◽  
Sherif Elbasuney ◽  
Daria C. Boffito
Keyword(s):  
Metal Organic Framework ◽  
Catalytic Efficiency ◽  
Decomposition Temperature ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Metal Organic ◽  
Iron Based ◽  
Decomposition Enthalpy ◽  
Energetic Systems ◽  
Organic Framework

Abstract The 3D metal-organic framework (MOF), MIL-88B, built from the trivalent metal ions and the ditopic 1,4-Benzene dicarboxylic acid linker (H2BDC), distinguishes itself from the other MOFs for its flexibility and high thermal stability. MIL-88B was synthesized by a rapid microwave-assisted solvothermal method at high power (850 W). The iron-based MIL-88B [Fe3.O.Cl.(O2C-C6H4 -CO2)3] exposed oxygen and iron content of 29% and 24%, respectively, which offers unique properties as an oxygen-rich catalyst for energetic systems. Upon dispersion in an organic solvent and integration into ammonium perchlorate (AP) (the universal oxidizer for energetic systems), the dispersion of the MOF particles into the AP energetic matrix was uniform (investigated via elemental mapping using an EDX detector). Therefore, MIL-88B(Fe) could probe AP decomposition with the exclusive formation of mono-dispersed Fe2O3 nanocatalyst during the AP decomposition. The evolved nanocatalyst can offer superior combustion characteristics. XRD pattern for the MIL-88B(Fe) framework TGA residuals confirmed the formation of α-Fe2O3 nanocatalyst as a final product. The catalytic efficiency of MIL-88B(Fe) on AP thermal behavior was assessed via DSC and TGA. AP solely demonstrated a decomposition enthalpy of 733 J g-1 , while AP/MIL-88B(Fe) showed a 66% higher decomposition enthalpy of 1218 J g-1 ; the main exothermic decomposition temperature was decreased by 71 °C. Besides, MIL-88B(Fe) resulted in a decrease in AP decomposition activation energy by 23% and 25% using Kissinger and Kissinger–Akahira–Sunose (KAS) models, respectively.

scholarly journals An Effective Hybrid Heterogeneous Catalyst to Desulfurize Diesel: Peroxotungstate@Metal–Organic Framework

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5494
Author(s):  
Yan Gao ◽  
Fátima Mirante ◽  
Baltazar de Castro ◽  
Jianshe Zhao ◽  
Luís Cunha-Silva ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Metal Organic Framework ◽  
Oxidative Desulfurization ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
Impregnation Method ◽  
Extraction Solvent ◽  
Metal Organic ◽  
Model Diesel ◽  
Organic Framework

A peroxotungstate composite comprising the chromium terephthalate metal–organic framework MIL-101(Cr) and the Venturello peroxotungstate [PO4{WO(O2)2}4]3− (PW4) has been prepared by the impregnation method. The PW4@MIL-101(Cr) composite presents high catalytic efficiency for oxidative desulfurization of a multicomponent model diesel containing the most refractory sulfur compounds present in real fuels (2000 ppm of total S). The catalytic performance of this heterogeneous catalyst is similar to the corresponding homogeneous PW4 active center. Desulfurization efficiency of 99.7% was achieved after only 40 min at 70 °C using H2O2 as an oxidant and an ionic liquid as an extraction solvent ([BMIM]PF6, 2:1 model diesel/[BMIM]PF6). High recycling and reusing capacity was also found for PW4@MIL-101(Cr), maintaining its activity for consecutive oxidative desulfurization cycles. A comparison of the catalytic performance of this peroxotungstate composite with others previously reported tungstate@MIL-101(Cr) catalysts indicates that the presence of active oxygen atoms from the peroxo groups promotes a higher oxidative catalytic efficiency in a shorter reaction time.

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