scholarly journals Biodegradable Metal Organic Frameworks for Multimodal Imaging and Targeting Theranostics

Biosensors ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 299
Author(s):  
Xiangdong Lai ◽  
Hui Jiang ◽  
Xuemei Wang
Keyword(s):  
Metal Ion ◽  
Multimodal Imaging ◽  
Rational Design ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Organic Ligand ◽  
Therapeutic Strategies ◽  
Ion Clusters ◽  
Surface Areas ◽  
Metal Organic

Though there already had been notable progress in developing efficient therapeutic strategies for cancers, there still exist many requirements for significant improvement of the safety and efficiency of targeting cancer treatment. Thus, the rational design of a fully biodegradable and synergistic bioimaging and therapy system is of great significance. Metal organic framework (MOF) is an emerging class of coordination materials formed from metal ion/ion clusters nodes and organic ligand linkers. It arouses increasing interest in various areas in recent years. The unique features of adjustable composition, porous and directional structure, high specific surface areas, biocompatibility, and biodegradability make it possible for MOFs to be utilized as nano-drugs or/and nanocarriers for multimodal imaging and therapy. This review outlines recent advances in developing MOFs for multimodal treatment of cancer and discusses the prospects and challenges ahead.

A rational design of efficient trifunctional electrocatalysts derived from tailored Co2+-functionalized anionic metal–organic frameworks

2020 ◽  
Vol 49 (7) ◽  
pp. 2280-2289 ◽  
Author(s):  
Miaojie Shi ◽  
Jun-Hao Wang ◽  
Ying Zhang ◽  
Xian-Ming Zhang
Keyword(s):  
Water Splitting ◽  
Rational Design ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Metal Organic ◽  
Organic Framework

An efficient trifunctional electrocatalyst was fabricated through pyrolyzing a rationally designed Co2+- functionalized anionic metal–organic framework, yielding excellent performances in Zn–air batteries and water-splitting applications.

Metal–organic framework thin films: electrochemical fabrication techniques and corresponding applications & perspectives

2016 ◽  
Vol 4 (32) ◽  
pp. 12356-12369 ◽  
Author(s):  
Wei-Jin Li ◽  
Min Tu ◽  
Rong Cao ◽  
Roland A. Fischer
Keyword(s):  
Thin Films ◽  
Metal Organic Framework ◽  
High Surface ◽  
Metal Organic Frameworks ◽  
Industrial Applications ◽  
Surface Areas ◽  
Metal Organic ◽  
Electrochemical Fabrication ◽  
Organic Framework

Metal–organic frameworks (MOFs) hold tremendous promise for various academic and industrial applications because of their structural merits (e.g., high surface areas, enormous porosity, and regular order).

scholarly journals Recent Progress in Heavy Metal Ion Decontamination Based on Metal–Organic Frameworks

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1481
Author(s):  
Yajie Chen ◽  
Xue Bai ◽  
Zhengfang Ye
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
High Surface ◽  
Metal Organic Frameworks ◽  
Environmental Safety ◽  
Surface Areas ◽  
Effective Removal ◽  
Pore Size Distributions ◽  
Metal Organic

Heavy metals are inorganic pollutants which pose a serious threat to human and environmental safety, and their effective removal is becoming an increasingly urgent issue. Metal–organic frameworks (MOFs) are a novel group of crystalline porous materials, which have proven to be promising adsorbents because of their extremely high surface areas, optimizable pore volumes and pore size distributions. This study is a systematic review of the recent research on the removal of several major heavy metal ions by MOFs. Based on the different structures of MOFs, varying adsorption capacity can be achieved, ranging from tens to thousands of milligrams per gram. Many MOFs have shown a high selectivity for their target metal ions. The corresponding mechanisms involved in capturing metal ions are outlined and finally, the challenges and prospects for their practical application are discussed.

scholarly journals Metal–Organic Framework Membranes: From Fabrication to Gas Separation

Crystals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 412 ◽  
Author(s):  
Osama Shekhah ◽  
Valeriya Chernikova ◽  
Youssef Belmabkhout ◽  
Mohamed Eddaoudi
Keyword(s):  
Gas Separation ◽  
Metal Ion ◽  
Metal Organic Framework ◽  
Advanced Materials ◽  
Ion Clusters ◽  
Industrial Setting ◽  
Separation Membrane ◽  
Potential Applications ◽  
Thin Membranes ◽  
Metal Organic

Gas membrane-based separation is considered one of the most effective technologies to address energy efficiency and large footprint challenges. Various classes of advanced materials, including polymers, zeolites, porous carbons, and metal–organic frameworks (MOFs) have been investigated as potential suitable candidates for gas membrane-based separations. MOFs possess a uniquely tunable nature in which the pore size and environment can be controlled by connecting metal ions (or metal ion clusters) with organic linkers of various functionalities. This unique characteristic makes them attractive for the fabrication of thin membranes, as both the diffusion and solubility components of permeability can be altered. Numerous studies have been published on the synthesis and applications of MOFs, as well as the fabrication of MOF-based thin films. However, few studies have addressed their gas separation properties for potential applications in membrane-based separation technologies. Here, we present a synopsis of the different types of MOF-based membranes that have been fabricated over the past decade. In this review, we start with a short introduction touching on the gas separation membrane technology. We also shed light on the various techniques developed for the fabrication of MOF as membranes, and the key challenges that still need to be tackled before MOF-based membranes can successfully be used in gas separation and implemented in an industrial setting.

scholarly journals Growth inhibition ofMicrocystic aeruginosaby metal–organic frameworks: effect of variety, metal ion and organic ligand

RSC Advances ◽  
2018 ◽  
Vol 8 (61) ◽  
pp. 35314-35326 ◽  
Author(s):  
Gongduan Fan ◽  
Liang Hong ◽  
Xiaomei Zheng ◽  
Jinjin Zhou ◽  
Jiajun Zhan ◽  
...  
Keyword(s):  
Growth Inhibition ◽  
Metal Ions ◽  
Metal Ion ◽  
Metal Organic Frameworks ◽  
Organic Ligand ◽  
Organic Ligands ◽  
Metal Organic

MOFs have been applied in the inactivation ofMicrocystic aeruginosa. The algal suppression by MOFs depends on the presence of different metal ions and organic ligands.

Two-dimensional metal–organic frameworks with high oxidation states for efficient electrocatalytic urea oxidation

2017 ◽  
Vol 53 (79) ◽  
pp. 10906-10909 ◽  
Author(s):  
Dongdong Zhu ◽  
Chunxian Guo ◽  
Jinlong Liu ◽  
Liang Wang ◽  
Yi Du ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Organic Ligand ◽  
Oxidation States ◽  
Two Dimensional ◽  
Benzenedicarboxylic Acid ◽  
High Oxidation ◽  
Metal Organic ◽  
Nickel Species

A two-dimensional metal–organic framework comprising nickel species and an organic ligand of benzenedicarboxylic acid is fabricated and explored as an electrocatalyst for urea oxidation reaction.

scholarly journals The Modulating Effect of Ethanol on the Morphology of a Zr-based Metal-Organic Framework under Room Temperature in the Cosolvent System

2021 ◽  
Author(s):  
Yunzhuo Li ◽  
Zirong Tang ◽  
Chen Chen
Keyword(s):  
Metal Ion ◽  
Room Temperature ◽  
Metal Organic Framework ◽  
Solvent Ratio ◽  
Marangoni Flow ◽  
Flow Effect ◽  
Ion Clusters ◽  
Metal Organic ◽  
Linker Molecules ◽  
Organic Framework

We report that ethanol, used together with water, plays a crucial role in tuning the structures of a zirconium-based Metal-Organic Framework, the 12-connected MOF-801, and the possible mechanisms of this modulating effect. By employing the cosolvent system of ethanol and water just under room temperature without the presence of a monotopic carboxylic acid as the modulator, MOF-801 in various morphologies of different sizes can be synthesized. The linear correlation between the ethanol/water ratio and the crystal sizes is also demonstrated. The growth mechanism is mainly explained by ethanol’s binding with the metal ion clusters and the Marangoni Flow Effect. Ethanol competes with the linker molecules in coordinating with the Zr metal clusters, a role similar to that of the modulators. The Marangoni Flow Effect, which dominates at a certain solvent ratio, further promotes the 1-D alignment of the MOF-801 crystals.

Deducing CO2 motion, adsorption locations and binding strengths in a flexible metal–organic framework without open metal sites

2016 ◽  
Vol 18 (12) ◽  
pp. 8327-8341 ◽  
Author(s):  
Yue Zhang ◽  
Bryan E. G. Lucier ◽  
Yining Huang
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Variable Temperature ◽  
Metal Organic Framework ◽  
High Surface ◽  
Metal Organic Frameworks ◽  
Surface Areas ◽  
Open Metal Sites ◽  
Metal Organic ◽  
Flexible Metal

Microporous metal–organic frameworks (MOFs) have high surface areas and porosities, and are well-suited for CO2 capture. Several important details regarding CO2 capture in the flexible MIL-53 MOF are revealed from variable-temperature solid-state NMR experiments.

scholarly journals Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6847
Author(s):  
Li-Li Xu ◽  
Qiu-Feng Zhang ◽  
Dong Wang ◽  
Guang-Wei Wu ◽  
Hong Cai
Keyword(s):  
Metal Ion ◽  
High Selectivity ◽  
Solvothermal Method ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Selective Recognition ◽  
Luminescent Intensity ◽  
Ferric Ions ◽  
Quenching Efficiency ◽  
Metal Organic

Fluorescent metal–organic frameworks (MOFs) are ideal materials for sensors because of their adjustable pore size and functional groups, which provide them with favorable metal ion selective recognition. In this paper, a new cadmium-based MOF was synthesized using Cd(NO3)2·4H2O and 3,3′,5,5′-biphenyltetracarboxylic acid by solvothermal method. CdBPTC owned three types of channels with dimensions of approximately 8.4 × 8.3 Å, 6.0 × 5.2 Å, 9.7 × 8.4 Å along a, b, and c axis, respectively. This MOF has high selectivity to ferric ions and shows excellent anti-inference ability toward many other cations. The results indicate that the fluorescence quenching efficiency of CdBPTC is close to 100% when the concentration of Fe3+ reaches 1.0 × 10−3 mol·L−1. Moreover, the luminescent intensity at 427 nm presents a linear relationship at a concentration range of 2.0 × 10−4~7.0 × 10−4 mol·L−1, which can be quantitatively expressed by the linear Stern–Volmer equation I0/I = 8489 [Fe3+] − 0.1400, which is comparable to the previously reported better-performing materials. Competitive energy absorption and ion exchange may be responsible for the variation in fluorescence intensity of CdBPTC in different Fe3+ concentrations.

scholarly journals The Modulating Effect of Ethanol on the Morphology of a Zr-Based Metal–Organic Framework at Room Temperature in a Cosolvent System

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 434
Author(s):  
Yunzhuo Li ◽  
Zirong Tang ◽  
Chen Chen
Keyword(s):  
Metal Ion ◽  
Room Temperature ◽  
Metal Organic Framework ◽  
Solvent Ratio ◽  
Marangoni Flow ◽  
Flow Effect ◽  
Ion Clusters ◽  
Metal Organic ◽  
Linker Molecules ◽  
Organic Framework

We report that ethanol, used together with water, plays a crucial role in tuning the structures of a zirconium-based metal–organic framework and the 12-connected MOF-801, as well as the possible mechanisms of this modulating effect. By employing a cosolvent system of ethanol and water at just under room temperature without the presence of a monotopic carboxylic acid as the modulator, MOF-801 in various morphologies of different sizes could be synthesized. A linear correlation between the ethanol/water ratio and the crystal sizes is also demonstrated. The growth mechanism is mainly explained by ethanol’s bonding with the metal ion clusters and the Marangoni flow effect. Ethanol competes with the linker molecules in coordinating with the Zr metal clusters, a role similar to that of the modulators. The Marangoni flow effect, which dominates at a certain solvent ratio, further promotes the 1D alignment of the MOF-801 crystals.

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