Construction of Stable Metal-Organic Framework Platforms Embedding N-Heterocyclic Carbene Metal Complexes for Selective Catalysis

10.26434/chemrxiv-2021-t6lcq-v2 ◽

2021 ◽

Author(s):

Hyunyong Kim ◽

Hyunseok Kim ◽

Kimoon Kim ◽

Eunsung Lee

Keyword(s):

Metal Complexes ◽

Metal Organic Framework ◽

Significant Loss ◽

High Catalytic Activity ◽

High Porosity ◽

Gold Chloride ◽

Practical Applications ◽

Metal Organic ◽

Interpenetrated Structure ◽

Copper Halides

We report a bottom-up approach to immobilize catalysts into MOFs, including copper halides and gold chloride in a predictable manner. Interestingly, the structures of MOFs bearing NHC metal complexes maintained a similar 4-fold interpenetrated cube. They exhibited exceptionally high porosity despite the interpenetrated structure and showed good stability in various solvents. Moreover, these MOFs possess high size activity depending on the size of the substrates in various reactions, compared to homogeneous catalysis. Also, the high catalytic activity of MOFs can be preserved 4 times without significant loss of crystallinity. Incorporation of the various metal complexes into MOFs allows for the preparation of functional MOFs for practical applications.

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Gold nanoparticles decorated rGO-encapsulated metal-organic frameworks composite sensor for the detection of dopamine

Canadian Journal of Chemistry ◽

10.1139/cjc-2020-0292 ◽

2020 ◽

Author(s):

Shaoming Yang ◽

Jian Zhang ◽

Chaopeng Bai ◽

Kaiqiang Deng

Keyword(s):

Gold Nanoparticles ◽

Modified Electrode ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

High Catalytic Activity ◽

Practical Applications ◽

Reduced Graphene ◽

Morphology And Structure ◽

Metal Organic ◽

Composite Sensor

In this study by way of encapsulation of reduced graphene oxide (rGO) into Ni-based metal-organic framework (Ni-MOFs) structure, the composite rGO@Ni-MOFs was first prepared. Then gold nanoparticles (AuNPs) decorated rGO@Ni-MOFs (rGO@Ni-MOFs/AuNPs) was obtained through the electrodeposition. The morphology and structure of rGO@Ni-MOFs/AuNPs were characterized by SEM, FTIR and XRD. The rGO@Ni-MOFs/AuNPs modified electrode was used for the detection of dopamine (DA). The combining the catalysis from Ni-MOFs and AuNPs with the conductivity of rGO endowed rGO@Ni-MOFs/AuNPs with synergetic high catalytic activity to the electrochemical oxidation of DA. The developed modified electrode had a good linear relationship with DA in the concentration range of 0.5 μM～120 μM, and the detection limit was 0.33 μM (S/N=3). Additionally, the potential interferents, electrode stability, reproducibility and practical applications were also studied and satisfactory results were obtained.

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Nano-Metal Organic Framework for Enhanced Mechanical, Flame Retardant and Ultraviolet-Blue Light Shielding Properties of Transparent Cellulose-Based Bioplastics

Polymers ◽

10.3390/polym13152433 ◽

2021 ◽

Vol 13 (15) ◽

pp. 2433

Author(s):

Lijian Sun ◽

Limei Li ◽

Xianhui An ◽

Xueren Qian

Keyword(s):

Flame Retardant ◽

Blue Light ◽

Hot Pressing ◽

Metal Organic Framework ◽

Composite Films ◽

Regenerated Cellulose ◽

Practical Applications ◽

Metal Organic ◽

Shielding Properties ◽

Organic Framework

From the perspective of sustainable development and practical applications, there has been a great need for the design of multifunctional transparent cellulose-based composite films. We herein propose a novel concept of improving the mechanical, fire-resistant and ultraviolet (UV)-blue light shielding properties of cellulose-based composite bioplastic films though in situ embedding nano-metal organic framework (MIL-125(Ti)-NH2) into regenerated cellulose gel. Regenerated cellulose hydrogel (CH) with a porous structure acts as a nanoreactor and stabilizer to facilitate the growth and anchorage of MIL-125(Ti)-NH2 nanoparticles (MNPs). Subsequently, hot-pressing induces the formation of transparent MIL-125(Ti)-NH2@cellulose bioplastics (MNP@CBPs). As expected, the MNP@CBPs exhibit exceptional UV-blue light shielding capability, while retaining satisfactory optical transmittance. Meanwhile, with the incorporation of MNPs, the mechanical strength of MNP@CBPs is increased by 6.5∼25.9%. In addition, MNPs enhance the flame retardant effect of the MNP@CBPs. The limited oxygen index (LOI) of the MNP@CBPs increased from 21.95 to 27.01%. The hot-pressing process improves the resistance of the MNP@CBPs to the penetration of water/non-aqueous liquids. This simple strategy would direct sustainable multifunctional MNP@CBPs toward diversified applications: food containers or packaging materials that can reduce or eliminate food spoilage, screen protectors for blocking harmful light, and promising candidates for protective plastic products, among others.

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Metal-Organic Framework Transistors for Dopamine Sensing

Materials Chemistry Frontiers ◽

10.1039/d1qm00118c ◽

2021 ◽

Author(s):

Jiajun Song ◽

Jianzhong Zheng ◽

Anneng Yang ◽

Hong Liu ◽

Zeyu Zhao ◽

...

Keyword(s):

Charge Transport ◽

Transport Properties ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

High Porosity ◽

Two Dimensional ◽

Metal Organic ◽

Organic Framework

Two-dimensional (2D) conductive metal-organic frameworks (MOFs) can not only inherit the high porosity and tailorability of traditional MOFs but also exhibit unique charge transport properties, offering promising opportunities for applications...

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Binder-Free mechanochemical metal-organic framework nanocrystal coatings

Nanoscale ◽

10.1039/d1nr08377e ◽

2022 ◽

Author(s):

Rijia Lin ◽

Yuqi Yao ◽

Muhammad Yazid Bin Zulkifli ◽

Xuemei Li ◽

Shuai Gao ◽

...

Keyword(s):

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Practical Applications ◽

Metal Organic ◽

Binder Free ◽

Organic Framework

The practical applications of metal-organic frameworks (MOFs) usually require their assembly into mechanically robust structures, usually achieved via coating onto various types of substrates. This paper describes a simple, scalable,...

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Highly stable metal-organic framework UiO-66-NH2 for high-performance triboelectric nanogenerators

Nanotechnology ◽

10.1088/1361-6528/ac32f8 ◽

2021 ◽

Author(s):

Yong-Mei Wang ◽

Xinxin Zhang ◽

Dingyi Yang ◽

Liting Wu ◽

Jiaojiao Zhang ◽

...

Keyword(s):

High Performance ◽

Metal Organic Framework ◽

High Surface ◽

High Surface Area ◽

Triboelectric Nanogenerator ◽

High Porosity ◽

Chemically Modified ◽

Metal Organic ◽

Triboelectric Nanogenerators ◽

Organic Framework

Abstract The high porosity, controllable size, high surface area, and chemical versatility of a metal-organic framework (MOF) enable it a good material for a triboelectric nanogenerator (TENG), and some MOFs have been incorporated in the fabrication of TENGs. However, the understanding of effects of MOFs on the energy conversion of a TENG is still lacking, which inhibits the improvement of the performance of MOF-based TENGs. Here, UiO-66-NH2 MOFs were found to significantly increase the power of a TENG and the mechanism was carefully examined. The electron-withdrawing ability of Zr-based UiO-66-family MOFs was enhanced by designing the amino functionalized 1,4-terephthalic acid (1,4-BDC) as ligand. The chemically modified UiO-66-NH2 was found to increase the surface roughness and surface potential of a composite film with MOFs embedded in polydimethylsiloxane (PDMS) matrix. Thus the total charges due to the contact electrification increased significantly. The composite-based TENG was found to be very durable and its output voltage and current were 4 times and 60 times higher than that of a PDMS-based TENG. This work revealed an effective strategy to design MOFs with excellent electron-withdrawing abilities for high-performance TENGs.

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High Catalytic Activity of C 60 Pd n Encapsulated in Metal–Organic Framework UiO‐67, for Tandem Hydrogenation Reaction

Chemistry - A European Journal ◽

10.1002/chem.201803900 ◽

2018 ◽

Vol 24 (72) ◽

pp. 19141-19145 ◽

Cited By ~ 6

Author(s):

Deng‐Yue Zheng ◽

Xue‐Meng Zhou ◽

Suresh Mutyala ◽

Xiao‐Chun Huang

Keyword(s):

Catalytic Activity ◽

Metal Organic Framework ◽

Hydrogenation Reaction ◽

High Catalytic Activity ◽

Metal Organic ◽

Organic Framework

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A metal–organic framework with in situ generated low-coordinate binuclear Cu(i) units as a highly effective catalyst for photodriven hydrogen production

Chemical Communications ◽

10.1039/c9cc09589f ◽

2020 ◽

Vol 56 (49) ◽

pp. 6700-6703

Author(s):

Ning-Yu Huang ◽

Hai He ◽

Hao Li ◽

Pei-Qin Liao ◽

Xiao-Ming Chen

Keyword(s):

Catalytic Activity ◽

Hydrogen Production ◽

Synergistic Effect ◽

Metal Organic Framework ◽

High Catalytic Activity ◽

Binuclear Copper ◽

Metal Organic ◽

Cu Ions ◽

Organic Framework

Here, we report a metal–organic framework featuring a binuclear copper unit, showing extraordinarily high catalytic activity (102.8 mmol g−1 h−1) for photodriven H2 generation, which is attributed to the synergistic effect between the two Cu ions.

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An Efficient and Reusable Multifunctional Composite Magnetic Nanocatalyst for Knoevenagel Condensation

Synlett ◽

10.1055/s-0037-1612076 ◽

2019 ◽

Vol 30 (06) ◽

pp. 699-702 ◽

Cited By ~ 15

Author(s):

Yu Hu ◽

Nan Yao ◽

Jin Tan ◽

Yang Liu

Keyword(s):

Active Sites ◽

Heterogeneous Catalysts ◽

Knoevenagel Condensation ◽

Metal Organic Framework ◽

Catalytic Performance ◽

Significant Loss ◽

Magnetic Nanocatalyst ◽

Metal Organic ◽

Nife2o4 Nanoparticles ◽

Organic Framework

A range of multifunctional magnetic metal–organic framework nanomaterials consisting of various mass ratios of the metal–organic framework MIL-53(Fe) and magnetic SiO2@NiFe2O4 nanoparticles were designed, prepared, characterized, and evaluated as heterogeneous catalysts for the Knoevenagel condensation. The as-fabricated nanomaterials, especially the nanocatalyst MIL-53(Fe)@SiO2@NiFe2O4(1.0), showed good catalytic performance in the Knoevenagel condensation at room temperature as a result of synergistic interaction between the Lewis acid iron sites of MIL-53(Fe) and the active sites of the magnetic SiO2@NiFe2O4 nanoparticles. In addition, the heterogeneous catalyst was readily recovered and a recycling test showed that it could be reused for five times without significant loss of its catalytic activity, making it economical and environmentally friendly.

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