Article
Chemistry, Inorganic & Nuclear
Zhen Zhang, Jie Zhou, Xue Chen, Tong Yan, Hanxu Sun, Lin Du, Qihua Zhao
Summary: By utilizing solvent-oriented structural self-assembly and solvent-induced single-crystal to single-crystal transformation strategies, eight structurally distinct Cd-CPs were controllably synthesized with the same linkers for the first time. The significant role of solvents in the self-assembly and transformations in CPs has been demonstrated, and rare reversible CP-based phase transition phenomena at low temperatures were observed, including the first example of a novel turn-on-off CP-based Fe3+ ion sensor.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yang Liu, Hongyan Liu, Xiaolei Shi, Hui Yan, Wenxiao Guo, Shufang Wang, Xiaoxue Ma, Lu Zhang, Lingqian Kong, Guifang Chen, Xiuping Ju, Xia Li, Yan Yang, Hongjie Zhu, Yunwu Li, Fangna Dai, Hongguo Hao
Summary: Three novel porous transition-metal-organic frameworks have been prepared, showing excellent stability and functionality for nitrophenol reduction and fluorescence sensing tests.
INORGANIC CHEMISTRY
(2022)
Review
Nanoscience & Nanotechnology
Ziwei Cao, Roya Momen, Shusheng Tao, Dengyi Xiong, Zirui Song, Xuhuan Xiao, Wentao Deng, Hongshuai Hou, Sedat Yasar, Sedar Altin, Faith Bulut, Guoqiang Zou, Xiaobo Ji
Summary: This comprehensive review outlines the synthetic methods and electrochemical performances of metal-organic frameworks (MOFs), as well as their applications in the field of supercapacitors. The review highlights the advantages of MOFs-related materials and discusses the major challenges and opportunities for future research.
NANO-MICRO LETTERS
(2022)
Review
Chemistry, Multidisciplinary
Yao Jiang, Peng Tan, Xiao-Qin Liu, Lin-Bing Sun
Summary: Adsorptive separation is crucial in various industries, but the requirements for adsorbents differ during adsorption and desorption processes. To address this challenge, the development of process-oriented smart adsorbents (POSAs) that dynamically adjust pore structures and surface properties is essential for enhancing efficiency in adsorption and desorption simultaneously.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Physical
Matthew A. Pearson, Mircea Dinca, Jeremiah A. Johnson
Summary: The study focused on synthesizing polyMOF ligands featuring MOF-forming benzenedicarboxylic acid linkers using common radical polymerization techniques: reversible addition fragmentation chain transfer (RAFT) polymerization and free radical polymerization (FRP). It was found that high-dispersity ligands prepared through FRP formed crystalline polyMOFs, while low-dispersity ligands prepared through RAFT required additional H(2)bdc to yield crystalline materials similar to MOF-5 and UiO-66. This work suggests that ligand dispersity is a key factor for polyMOF synthesis and presents new possibilities for developing polymer-MOF hybrids based on radical polymerization.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ziqi Zhou, Qiaomei Ke, Manni Wu, Ling Zhang, Ke Jiang
Summary: Metal-organic frameworks (MOFs) are efficient carriers for controlled drug delivery due to their large surface area and adjustable pore size. A new approach called Pore Space Partition (PSP) was used to effectively encapsulate and pH-controlled co-delivery of two guest molecules. ZIF-8's pore space was partitioned by encapsulating the large molecule ursolic acid (UA), and the remaining space was filled with the small molecule 5-fluorouracil (5-FU). This approach resulted in a high loading capacity of UA (12.80 wt %) and 5-FU (11.20 wt %) in the 5-FU&UA@ZIF-8. This smart carrier exhibited pH-controlled delivery of UA and surprisingly showed pH-responsive delivery of 5-FU after pore space partition. The co-delivery of 5-FU and UA demonstrated excellent anticancer performance against 4T1 cells.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Physical
Anastasiia S. Efimova, Pavel V. Alekseevskiy, Maria V. Timofeeva, Yuliya A. Kenzhebayeva, Alina O. Kuleshova, Irina G. Koryakina, Dmitry I. Pavlov, Taisiya S. Sukhikh, Andrei S. Potapov, Sergei A. Shipilovskikh, Nan Li, Valentin A. Milichko
Summary: Two-dimensional metal-organic frameworks (MOFs) possess unique properties and exhibit high potential in various applications due to their porosity and organo-inorganic nature. However, the scalability of 2D MOF layers is limited by weak interactions between organic and inorganic building blocks. This study compared three top-down approaches and established technological criteria for creating 2D MOF layers with thickness up to 1 nm and a record aspect ratio of up to 2*10^4:1. The freezing-thaw and mechanical exfoliation methods showed the greatest scalability, surpassing the sonication approach, and high-quality 2D MOF layers with a record aspect ratio were achieved, enabling the fabrication of scalable and freestanding 2D MOF-based atomically thin chemo-optical sensors.
Article
Chemistry, Analytical
Rujia Liu, Rui Jia, Dengchao Wang, Michael V. Mirkin
Summary: Recently, conductive carbon nanopipettes have been used for electrochemical resistive-pulse (ERP) sensing to detect single liposomes and biological vesicles, and analyze the redox molecules contained in them. However, the origins of different shapes of current transients produced by the translocation of single vesicles through the nanopipette remain unclear. This study extensively simulated the current blockage by vesicles approaching and passing through the pipet orifice, as well as the faradaic current spike caused by the oxidation/reduction of redox species released from vesicles on the carbon surface, investigating the effects of various parameters on the shape of current transients.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Jianxi Liu, Li Feng, Zhihuan Li, Yang Wu, Feng Zhou, Yadong Xu
Summary: Metal-organic frameworks (MOFs) based MIM cavities treated by plasma etching provide channels for chemical diffusion and demonstrate sensing behavior. Modulating the MOF thickness allows control of the MIM filter bandwidth. Plasma-etched MOFs-based MIM cavities show potential for chemical sensing. Patterned structures of MOFs-based MIM cavities can be generated via plasma-mask method.
Review
Engineering, Environmental
Rui Zhang, Lihui Lu, Yangyang Chang, Meng Liu
Summary: This article reviews the fundamental aspects and applications of metal-organic frameworks (MOFs) in gas sensors, and discusses various techniques of monitoring gases using MOFs as functional materials. Insights and perspectives for further challenges faced by MOFs are also discussed.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Chemistry, Inorganic & Nuclear
Naini Garg, Akash Deep, Amit L. Sharma
Summary: Metal-organic Frameworks (MOFs) are porous crystalline structural materials made up of metal ions and organic linkers, offering endless combinations for various applications such as sensing, gas storage, catalysis, optoelectronics, and drug delivery. MOF nanostructures are being developed to incorporate beneficial attributes and overcome the weaknesses of individual components, leading to high-performance chemo-resistive gas sensors and other advanced applications.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Jia-Qian Chen, Leili Esrafili, Fatemeh Parsa, An-Na Sun, Mao-Lin Hu, Ali Morsali, Pascal Retailleau, Zhifang Guo, Peter C. Junk
Summary: Extensive research has been conducted on synthesizing MOFs with high surface areas, but simultaneously introducing functional groups on their backbones is still a challenge. Although using longer links can result in interpenetrating structures or instability, achieving MOFs with large pores and desirable functional groups is a long-standing challenge. However, the crystalline nature of MOFs allows for monitoring and controlling host-guest interactions. To better understand the effects of functional group structure and positions on applications, a platform of azo and azine-containing MOFs was designed and synthesized as a fluorescent probe for Danthron. TMU-84 and TMU-85 showed high sensitivity and significant K-sv (6572) value in distinguishing complementary and mismatched target sequences.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ilya Sterin, John Hadynski, Anna Tverdokhlebova, Madeline Masi, Evgeny Katz, Mario Wriedt, Oleh Smutok
Summary: This study investigates a metal-organic framework (MOF) called ZIF-8, which remains stable in neutral pH aqueous solutions but dissolves under acidic conditions. By electrochemical or enzymatic reactions, the pH can be decreased to induce MOF dissolution and payload release. The results suggest that signal-responsive materials with switchable features can be used to deliver biomolecules in biomedical applications.
ADVANCED MATERIALS
(2023)
Review
Engineering, Environmental
Semanur Saglam, Feride N. Turk, Hasan Arslanoglu
Summary: Dyed wastewater has a serious impact on living organisms and must be treated before being released into the environment. Metal organic frameworks (MOFs) have been proposed as the most effective method for dye wastewater removal due to their high adsorption capacity and adjustable pore diameter and surface morphology. This study aims to evaluate the effectiveness of different types of MOFs in dye separation from wastewater and includes the examination of adsorption isotherms, kinetics, and characterization studies. The desorption and reuse of MOFs are also considered.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Pharmacology & Pharmacy
Javier Salazar, Thais Carmona, Flavia C. Zacconi, Diego Venegas-Yazigi, Claudio Cabello-Verrugio, Won Il Choi, Cristian Vilos
Summary: Skin plays a preventive role in protecting the body's internal organs from damage caused by microorganisms and external environmental assaults. The dermis, representing the main section of the skin, contributes critically to skin physiology due to its diverse cellularity, vasculature, and release of molecular mediators. The complex structure of the skin limits substance transport, leading to the study of different nanoparticles for skin illness treatment and dermo-cosmetic applications. This study provides a detailed morphological description of the dermis, analyzes its role in regulating skin homeostasis and its alterations in pathophysiological conditions, and highlights its potential as a therapeutic target. Additionally, the use of nanoparticles for skin illness treatments, focusing on dermis release, and the promotion of metal-organic frameworks as an integrative strategy for skin treatments are described.
Article
Chemistry, Multidisciplinary
Robert Darkins, Ian J. McPherson, Ian J. Ford, Dorothy M. Duffy, Patrick R. Unwin
Summary: This study demonstrates a method to determine local supersaturation by utilizing the thermodynamic feature of crystal surfaces, allowing for quantitative measurement of surface-controlled kinetics. By applying this method to calcite measurements, the discrepancies between growth rates measured under different mass transport conditions are resolved, and the departure of the Gibbs-Thomson effect in calcite from classical theory is revealed.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Dimitrios Valavanis, Paolo Ciocci, Gabriel N. Meloni, Peter Morris, Jean-Francois Lemineur, Ian J. McPherson, Frederic Kanoufi, Patrick R. Unwin
Summary: The combination of SECCM and IRM techniques allows for the study of interfacial processes with high spatial and temporal resolution. SECCM confines reactions to specific regions on a surface, while IRM detects processes close to the substrate. This technique enables real-time monitoring of SECCM meniscus and processes at the electrode/electrolyte interface, providing valuable insights into phase formation processes.
FARADAY DISCUSSIONS
(2022)
Article
Chemistry, Multidisciplinary
Ian J. McPherson, Massimo Peruffo, Patrick R. Unwin
Summary: We demonstrate how combined in-situ measurements and finite element method modeling can provide new insight into the relative contribution of mass transport to the growth of calcium carbonate on two model surfaces. The study shows that calcite growth is significantly influenced by mass transport control, and dissolution/direct attachment of ACC and/or ion pairs also contribute to the growth process.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Reza J. J. Kashtiban, Christopher E. E. Patrick, Quentin Ramasse, Richard I. I. Walton, Jeremy Sloan
Summary: Halide perovskite structures formed at the quantum scale are revolutionizing optoelectronic materials design, such as solar cells and light-emitting diodes. Four sub-nanometer halide perovskite structures were successfully created inside single-walled carbon nanotubes, demonstrating unique properties and bandgap widening compared to bulk forms. These structures show promise in the development of advanced optoelectronic devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yongzhao Zhang, Baiwen Zhao, Satarupa Das, Volkan Degirmenci, Richard L. I. Walton
Summary: This study focuses on the synthesis of metal-organic frameworks with the UiO-66 structure and their use as catalysts for optimizing HMF yield. The materials exhibit high catalytic performance in DMSO solvent and can achieve high conversion and yield under optimized reaction conditions.
Article
Chemistry, Analytical
Kamsy Lerae Anderson, Martin Andrew Edwards
Summary: Scanning electrochemical cell microscopy (SECCM) uses an electrolyte-filled nanopipette to map the electrochemical activity of a surface with nanoscale resolution. This study provides algebraic expressions for current and concentration distributions in SECCM experiments, which show excellent agreement with numerical simulations and can be used to determine expected currents and quantify electron-transfer rate constants.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Lu Jia, Matthew D. Lloyd, Martin R. Lees, Limin Huang, Richard I. Walton
Summary: In this study, the crystallization of a new series of A-site substituted lanthanum ferrite materials (La1-xREx)FeO3 was explored using hydrothermal method. The effect of elemental substitution on the morphological, structural, and magnetic properties of the materials was studied. It was found that homogeneous solid solutions are formed when La3+ and substituent ions have similar radii, while crystallization in separate phases is found when there is a large radius difference. A-site replacement induces an evolution in the crystallite shape, providing evidence for a phase-separation-driven evolution of morphology.
INORGANIC CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Aron Summer, Helen Y. Playford, Lewis R. Owen, Janet M. Fisher, Amy Kolpin, David Thompsett, Richard I. Walton
Summary: Reverse Monte Carlo analysis was performed on neutron and x-ray total scattering data from two ceria-zirconia samples to analyze the distribution of cations and examine oxide-ion disorder. The first sample heated in air at moderate conditions showed a single-phase solid-solution structure with statistical distribution of cations, but a local tetragonal symmetry was observed. The second sample heated under H-2 followed by reoxidation exhibited considerable disorder and a non-statistical distribution of cations, indicating the presence of cation-rich nano-domains.
Article
Chemistry, Physical
Yulia M. T. A. Putri, Thomas W. Chamberlain, Volkan Degirmenci, Jarnuzi Gunlazuardi, Yuni K. Krisnandi, Richard I. Walton, Tribidasari A. Ivandini
Summary: This study proposes NiCo-MOF-74 synthesized directly on the surface of porous NiO film as an efficient electrocatalyst for the anode in direct urea fuel cells. The nickel-to-cobalt ratio of 4:1 exhibits the best catalytic activity towards urea oxidation, resulting in significant current enhancement compared to other electrodes. At optimized conditions, a current density of approximately 110 mA cm-2 and a maximum power density of 4131 mu W cm-2 can be achieved in an electrolyte solution of 3.0 M KOH and 1.0 M urea. The increased active surface area of the nickel-based anodes contributes to an abundance of active sites for urea oxidation, leading to excellent stability and reproducibility over 15 hours of application in a direct urea fuel cell.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Evangeline C. Wheeler-Jones, Melanie J. Loveridge, Richard I. Walton
Summary: A composite of Nb2O5 and MoO2 was synthesized and demonstrated as a high-capacity, high-rate anode for lithium-ion batteries. The composite showed an intimate mix of individual oxide particles, and a ratio of Nb : Mo of 45: 55. It exhibited notable rate capability and achieved a stable reversible capacity of 514 mAh g(-1), realizing its theoretical capacity.
BATTERIES & SUPERCAPS
(2023)
Article
Chemistry, Physical
Katherine J. Levey, Martin A. Edwards, Henry S. White, Julie V. Macpherson
Summary: A finite-element model is used to simulate the cyclic voltammetric response of a planar electrode for a 1e outer-sphere redox process, taking into account cell electrostatics and the structure of the potential-dependent electric double layer. Both reversible and quasi-reversible redox reactions are considered. The simulations provide information about the time-dependent electric potential and ion distributions throughout the cell during a voltammetric scan, allowing for the accurate determination of the faradaic and non-faradaic contributions to the cyclic voltammogram. The model also demonstrates the importance of electrostatic effects in determining electron-transfer kinetics and the concentrations of redox species at the plane of electron transfer.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Fabio Marcuccio, Dimitrios Soulias, Chalmers C. C. Chau, Sheena E. Radford, Eric Hewitt, Paolo Actis, Martin Andrew Edwards
Summary: In this study, the addition of poly(ethylene) glycol (PEG) to the external solution is shown to enhance the detection of biomolecules using solid-state nanopores. The researchers demonstrate that this addition creates an imbalance in the transport properties of cations and anions, which significantly affects the current response of the nanopore. The findings suggest that tuning the diffusion coefficients of ions could enhance the sensitivity of nanopore sensing.
ACS NANOSCIENCE AU
(2023)
Article
Chemistry, Multidisciplinary
Wilgner Lima da Silva, Ashok S. Menon, Martin R. Lees, Reza J. Kashtiban, Marc Walker, Louis F. J. Piper, Emma Kendrick, Richard I. Walton
Summary: A Mn2+-Li-Nb disordered rock-salt oxide cathode is prepared by a solid-state reaction under 5% H-2/N-2 atmosphere, showing a high voltage plateau and irreversible structural changes in the first cycle.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
A. S. Bathe, A. Sanz Arjona, A. Regan, C. Wallace, C. R. Nerney, N. O'Donoghue, J. M. Crosland, T. Simonian, R. I. Walton, P. W. Dunne
Summary: Titanium dioxide is a highly studied photocatalytic material with many applications. This study presents a simple solvothermal method to produce highly dispersible anatase phase titanium dioxide hybrid nanoparticles, allowing easy dispersion in organic solvents.
NANOSCALE ADVANCES
(2022)
