Article
Chemistry, Applied
Amarajothi Dhakshinamoorthy, Cristina Valles Garcia, Patricia Concepcion, Hermenegildo Garcia
Summary: In this study, Cu-3(BTC)(BTC: 1,3,5-benzenetricarboxylate) MOF is reported to be an effective catalyst for promoting the borylation of arenes through C-H activation. Compared to other MOFs, Cu-3(BTC) shows higher catalytic activity, with copper ions playing a crucial role in the catalytic mechanism.
Article
Nanoscience & Nanotechnology
Hong Zhang, Qiang Hu, Jutao Liu, Penghui Zhang, Shuaishuai Fu, Shang Wu
Summary: In this study, a metal-organic framework with an octahedral morphology supported by a tungstosilicic acid (TSA) nanocatalyst was successfully synthesized. The hybrid material showed high catalytic activity due to the synergistic effect of exposed metal iron sites and the supported Bronsted acid sites. The environmentally friendly nano-catalyst could be recycled multiple times without significant loss in catalytic performance. This study also provides insights into the application of porous organic polymer functionalization in organic synthesis.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jose M. Veleta, Roy A. Arrieta, Yanyu Wu, Miguel A. Baeza, Karen Castaneda, Dino Villagran
Summary: Increased gas adsorption was achieved in post-synthetically modified metal-organic frameworks (MOFs) of HKUST-1 type through a partial cation exchange process. The manipulation of post-synthetic conditions exhibited high tunability in site substitution and gas adsorption properties. The study conducted post-synthetic modification of Cu-3(BTC)(2) by exposure to TM2+ solutions (TM= Mn, Fe, Co, Ni) at different time intervals, and the crystal structure, composition, and morphology were analyzed. The results showed that the gas adsorption capacity could be enhanced by forming defects in the crystal structure during the cation exchange process.
Article
Chemistry, Multidisciplinary
Sandy Elmehrath, Hesham F. El-Maghraby, Yaser E. Greish
Summary: The formation of copper phosphate nanoflowers on the surface of Cu-BTC successfully stabilizes the copper-based Metal-Organic Framework. The innovative mechanism behind the formation of copper phosphate nanoflowers and its consequential stabilization of the Cu-BTC structure underscores its novel nature.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Green & Sustainable Science & Technology
John R. Mason, Joanna N. Weyrich, Hongwei Yang
Summary: The study investigates the influence of adding varying amounts of liquid on the formation of metal-organic framework Cu-3(BTC)(2) and its porosity during mechanochemical synthesis. Experimental results show that an increase in liquid during liquid-assisted grinding (LAG) process leads to larger microporosity in Cu-3(BTC)(2).
Article
Chemistry, Multidisciplinary
Junying Hou, Chuanyuan Hou, Jianchang Li, Jianjun Hao
Summary: A novel magnetic core-shell Fe3O4@Cu-3(BTC)(2) metal-organic framework (MOF) heterogeneous catalyst was synthesized and tested for olefin epoxidation, showing efficient activity. The catalyst exhibited a microsphere morphology with well-dispersed Cu-3(BTC)(2) MOFs on the Fe3O4(PAA) surface. It also demonstrated excellent activity for primary alcohols in the aerobic oxidation reaction.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2023)
Article
Chemistry, Physical
Xu Yang, Zhaoxia Zhang, Wu Liu, Tengda Liang, Dai Dang, Xinlong Tian
Summary: This study successfully prepared a highly dispersed CuO#TiO2 catalyst through a novel method, demonstrating superior performance in furfural hydrogenation with high activity and yield. The interaction between CuO and TiO2 was found to contribute to enhancing the catalyst's performance.
Article
Chemistry, Multidisciplinary
Jens Matthies Wrogemann, Marco Joes Luether, Peer Baermann, Mailis Lounasvuori, Ali Javed, Michael Tiemann, Ronny Golnak, Jie Xiao, Tristan Petit, Tobias Placke, Martin Winter
Summary: Different synthesis routes were used to obtain flake- and rod-like MOF particles of Cu-2,3,6,7,10,11-hexahydroxytriphenylene (Cu-3(HHTP)(2)), and their redox mechanism for Li+ ion storage was investigated. The kinetic properties for Li+ ion storage were compared between the two morphologies using cyclic voltammetry and impedance spectroscopy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zahra Mohammadpour, Hamid R. Zare
Summary: A smart anticorrosion nanocomposite coating with pH sensitivity was fabricated in this study, showing significant inhibition efficiency in a corrosive solution. The encapsulation of BTA inhibitor in Zn-BTC MOF successfully prolonged the durability of the coating, demonstrating a highly effective corrosion protection mechanism.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Inorganic & Nuclear
Juan Chen, Lu-Qi Bai, Yi-Fei Dai, Li-Cheng Deng, Yu Wang, Tao Zhang, Kai-Jie Chen
Summary: Encapsulating the mononuclear iron complex [(TPA)FeII-2L]2+ in the metal-organic framework UiO-66 via a two-step ship-in-a-bottle strategy provides ideal space confinement, protecting it from dimerization and significantly increasing its stability compared to the un-confined state.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Shang Wei, Jiayi Wu, Peng Chen, Bo Fu, Xinbao Zhu, Muhua Chen
Summary: In this study, composite adsorbents were prepared by integrating phosphotungstic acid (HPW) into zeolitic imidazolate framework-67 (ZIF-67) to enhance its dye adsorption capacity. The experimental results showed that the composite adsorbent had excellent adsorption capacity for cationic dye methylene blue (MB) and can be reused effectively.
Article
Chemistry, Physical
Samira Zamani, Alireza Abbasi, Majid Masteri-Farahani
Summary: Two metal-organic frameworks were prepared using post-synthetic modification method for advanced functional material design with enhanced catalytic activity. The newly prepared catalysts were characterized and optimized with different analyses, and Mo-catalyst showed the highest conversion rate in the epoxidation of olefins and allylic alcohols in a comparative study.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Teer Ba, Chenyang Shen, Xiaoshan Zhang, Chang-jun Liu
Summary: In this study, an edible gamma-cyclodextrin-metal-organic framework/RWR composite with macroscopic morphology was synthesized using rice wine residue (RWR) as the support. The obtained edible composite shows promising applications in drug delivery, adsorption, food processing, and other fields.
Article
Chemistry, Multidisciplinary
Chong Li, Hongtai Chen, Liming Fan, Xiutang Zhang
Summary: A highly robust microporous material NUC-69, generated through the self-assembly of zinc(II) cation and a multifunctional ligand, exhibits high catalytic performance on the cycloaddition reactions of CO2 with epoxides and excellent adsorption capacity for iodine (I-2).
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Q. Li, R. Zhao, Z. Lu, L. Xiao, L. Hou
Summary: This article presents the research on a halogen-free covalent organic framework (TAPPy-TFPPy-COF) based on imine bonds for the reversible polymerization under white light irradiation. By energy transfer, the polymerization reaction is initiated, resulting in polymers with controllable molecular weight and relatively uniform distribution. The obtained polymer has high chain end fidelity.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Applied
Juan I. Mirena, Denis Constales, Johan Martens, Jolien Dendooven, Gregory S. Yablonsky, Vladimir V. Galvita
Summary: The study reveals the complex dynamic behavior of CO oxidation over a Pt catalyst in heterogeneous catalysis. It shows that critical phenomena in such systems are influenced by surface interactions, nonlinear reaction mechanisms, and the transport of energy and mass. The pulse experiments conducted with a TAP reactor demonstrate the dependence of the dynamic patterns on the pulsed CO/O2 ratio and the local bed temperature, resulting in a dynamic transition between two critical values of the reaction rate for feed mixtures richer in O2 due to controlled interactions of adsorbed species on the catalyst's surface.
Article
Engineering, Chemical
Maarten Houlleberghs, Loes Verheyden, Filip Voorspoels, C. Vinod Chandran, Karel Duerinckx, Sambhu Radhakrishnan, Johan A. Martens, Eric Breynaert
Summary: Magnetohydrodynamic mixing was evaluated as an alternative method to conventional high shear mixing for preparing carbomer hydrogels. Results showed that magnetohydrodynamic mixing can adjust the viscosity of the hydrogel and achieve higher concentrations of TEA.
Article
Chemistry, Multidisciplinary
Karel Asselman, Mohamed Haouas, Maarten Houlleberghs, Sambhu Radhakrishnan, Wauter Wangermez, Christine E. A. Kirschhock, Eric Breynaert
Summary: Recently discovered zeolite precursors, hydrated silicate ionic liquids (HSIL), simplify the study of zeolite crystallization by minimizing the correlation of synthesis variables and elucidating the role of water. By conducting hydrothermal treatment of Al-doped potassium HSIL, porous merlinoite (MER) zeolite is formed when H2O/KOH exceeds 4, while dense, anhydrous megakalsilite is formed when H2O/KOH is lower. The selectivity of phase formation is determined by cation hydration, water activity, and affinity to coordinate with aluminosilicate or water.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Hannelore Geerts-Claes, Sam Smet, Christoph Hengst, Frank-Walter Schuetze, Elke Verheyen, Matthias Minjauw, Christophe Detavernier, Sreeprasanth Pulinthanathu Sree, Johan Martens
Summary: This study investigates the mechanism of NOx adsorption on a Pd/FER zeolite in gas mixtures containing CO, O2, and H2O. It is found that oxidized palladium is required for achieving NOx adsorption, while clustered zerovalent palladium reduced with H2 cannot adsorb NOx in the presence of O2. The study provides evidence for a reaction mechanism involving oxygen-bridged PdII-O-PdII moieties of PdO nanoclusters, and the NO adsorption site on palladium is obtained by reducing one of the two PdII atoms to the zerovalent state, which is more readily achieved with CO compared to NO, explaining the beneficial role of CO.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Nikolaus Doppelhammer, Stefan Puttinger, Nick Pellens, Thomas Voglhuber-Brunnmaier, Karel Asselman, Bernhard Jakoby, Christine E. A. Kirschhock, Erwin K. Reichel
Summary: When solute molecules in a liquid evaporate at the surface, concentration gradients can lead to surface tension gradients and provoke fluid convection at the interface, a phenomenon known as the Marangoni effect. Minute quantities of ethanol in concentrated sodium hydroxide solution can induce pronounced and long-lasting Marangoni flow upon evaporation at room temperature. By employing particle image velocimetry and gravimetric analysis, the mean interfacial speed of the evaporating solution is shown to increase with the evaporation rate for ethanol concentrations below 0.5 mol%.
Article
Chemistry, Multidisciplinary
Ewoud Vaneeckhaute, Jean-Max Tyburn, James G. Kempf, Johan A. Martens, Eric Breynaert
Summary: Amino acids and ammonia are essential metabolic markers for nitrogen metabolism and cellular regulation. This study demonstrates a high-field approach using NMR to investigate these metabolic pathways, providing a valuable alternative to existing techniques. By designing a specialized catalyst, spin order can be transferred from p-H-2 to N-15, allowing for reversible hyperpolarization of alanine and ammonia under ambient conditions. The stereochemistry and kinetics of these catalyst complexes are determined using isotopological fingerprinting and 2D-ZQ-NMR.
Review
Chemistry, Multidisciplinary
Karel Asselman, Christine Kirschhock, Eric Breynaert
Summary: Since the 1940s, researchers have been aiming to rationally design zeolites by controlling their synthesis to obtain desired properties. However, the fundamental processes of zeolite synthesis have remained largely unknown. This Account presents recent progress in crystallizing zeolites using hydrated silicate ionic liquids as synthesis media, allowing for the evaluation of the individual impacts of synthesis parameters on zeolite nucleation, growth, and phase selection. The relationship between the characteristics of the synthesis medium and the properties and structure of the crystalline product is elucidated.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Hannelore Geerts-Claes, Gina Vanbutsele, Sreeprasanth Pulinthanathu Sree, Sambhu Radhakrishnan, C. Vinod Chandran, Eric Breynaert, Johan A. Martens, Sam Smet
Summary: RHO zeolites with different Si/Al ratios and particle morphologies were successfully synthesized by adding crown ether and adjusting the sodium content. The zeolites showed exceptional stability even at low Si/Al ratios, which can be attributed to the double eight-ring framework.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Sambhu Radhakrishnan, Sam Smet, C. Vinod Chandran, Sreeprasanth Pulinthanathu Sree, Karel Duerinckx, Gina Vanbutsele, Johan A. Martens, Eric Breynaert
Summary: Selective catalytic reduction (SCR) is a major technology for reducing emissions from diesel engines, and variable temperature NMR can be used to predict the activity of Cu-zeolite SCR catalysts.
Article
Multidisciplinary Sciences
Emile Jules Beckwee, Geert Watson, Maarten Houlleberghs, Daniel Arenas Esteban, Sara Bals, Pascal Van Der Voort, Eric Breynaert, Johan Martens, Gino Baron, Joeri F. M. Denayer
Summary: This study reports a new type of periodic mesoporous organosilica (PMO) nanotubes, referred to as hollow ring PMO (HR-PMO), capable of promoting methane clathrate hydrate formation under mild working conditions and at high water loading. The HR-PMO nanotubes exhibit a steep single-stepped isotherm and a noticeably high methane storage capacity. Supported by ex situ cryo-electron tomography and x-ray diffraction, the findings suggest that HR-PMO nanotubes promote clathrate hydrate nucleation and growth by distributing and confining water in the mesopores of their outer wall, central channels, and external surface. These results highlight the potential application of organosilica materials for pressure-based storage of biomethane in confined clathrate hydrates.
Article
Chemistry, Multidisciplinary
Sambhu Radhakrishnan, Charlotte Lejaegere, Karel Duerinckx, Wei-Shang Lo, Alysson F. F. Morais, Dirk Dom, C. Vinod Chandran, Ive Hermans, Johan A. A. Martens, Eric Breynaert
Summary: During the liquid phase adsorption of C-1-C-5 primary alcohols on high silica MFI zeolites, the concentration of adsorbed molecules exceeds the traditional adsorption sites. This additional adsorption is driven by hydrogen bonding between the alcohol function and the zeolite siloxane bridges, while chemi- and physi-sorption on traditional sites also occur simultaneously.
MATERIALS HORIZONS
(2023)
Proceedings Paper
Materials Science, Characterization & Testing
Nikolaus Doppelhammer, Dries Vandenabeele, Karel Asselman, Eric Breynaert, Bernhard Jakoby, Christine E. A. Kirschhock
Summary: Studying the kinetics of crystal formation is crucial for understanding the self-assembly of complex materials. This study proposes a differential impedance measurement method to accurately track the in situ crystallization of zeolites, overcoming the limitations of classical electrode-based impedance spectroscopy.
2023 INTERNATIONAL WORKSHOP ON IMPEDANCE SPECTROSCOPY, IWIS
(2023)
Article
Chemistry, Physical
Geert Watson, Nithin B. Kummamuru, Sammy W. Verbruggen, Patrice Perreault, Maarten Houlleberghs, Johan Martens, Eric Breynaert, Pascal van der Voort
Summary: This study explores the use of hydrophobic periodic organosilica nanoparticles for hydrogen storage as clathrate hydrates. The surface decoration with promoter agents enhances the formation and growth kinetics of clathrate hydrates, resulting in an increase in hydrogen storage capacity. These findings are of significant importance for the development of hydrogen clathrates in industrial applications.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Alexander M. Prophet, Kritanjan Polley, Gary J. Van Berkel, David T. Limmer, Kevin R. Wilson
Summary: The oxidation kinetics of iodide by ozone at the air-water interface is studied in single microdroplets. Molecular simulations and kinetic modeling are used to understand the underlying multiphase mechanism.
Article
Chemistry, Multidisciplinary
Rong Zhang, Jiajing Lan, Fei Wang, Shumei Chen, Jian Zhang
Summary: By utilizing 1,1'-ferrocene dicarboxylic acid as a chelating and surface protection ligand, we have synthesized multi-nuclear indium oxide clusters with varying nuclear sizes, including heptanuclear and thirteen-nuclear clusters. These clusters possess labile coordination sites, allowing for structural modification and self-assembly, resulting in the formation of various cluster structures.
Article
Chemistry, Multidisciplinary
Hui Wang, Hui Liu, Mingsen Wang, Jiaheng Hou, Yongjun Li, Yuancheng Wang, Yingjie Zhao
Summary: Two supramolecular complexes were prepared using CBs and M1, and their single-crystal structures were analyzed by SCXRD. The unexpected 1:2 self-assembly structure between M1 and CB[8] was discovered for the first time. These complexes exhibit unique photophysical properties and provide valuable information about the structure and photophysical properties of supramolecular complexes.
Article
Chemistry, Multidisciplinary
Chang-Hee Lee, Sookil Park, Sanggil Kim, Ji Young Hyun, Hyun Soo Lee, Injae Shin
Summary: The epidermal growth factor receptor (EGFR) is a cell-surface glycoprotein involved in cell proliferation and tumor development. This study used a fluorescently labeled EGFR to investigate its time-dependent endocytosis in live cells and found that appended glycans affect EGFR internalization. Additionally, the study detected sialic acid residues attached to EGFR on the live cell surface using FRET-based imaging. This research provides valuable insights into the cellular functions of EGFR.
Article
Chemistry, Multidisciplinary
Subhankar Sahu, Lokesh Kumar, Sumita Das, Dipti Gupta, Ruchi Anand
Summary: This study proposes a strategy that combines organic electronics with biosensor scaffolds to create a compact device for monitoring environmental aromatic pollution. By coupling biosensing protein MopR with an organic electrochemical transistor (OECT), a sensor module capable of efficient detection of phenol was designed. Exclusive phenol detection with minimal loss of sensitivity could be achieved in complex pollutant mixtures and real environmental samples.
Review
Chemistry, Multidisciplinary
Changseok Lee, Hyung-Joon Kang, Sungwoo Hong
Summary: The formation of C-N bonds through hydroamination reactions catalyzed by nickel hydrides has been a topic of recent interest. This approach offers a way to efficiently transform a variety of alkene and alkyne substrates into compounds enriched with C-N bonds. The review provides a concise overview of the underlying reaction mechanisms and aims to stimulate further progress in NiH-catalytic techniques and catalyst design.
Article
Chemistry, Multidisciplinary
Yueci Wu, Lu-Lu Sun, Hai-Hao Han, Xiao-Peng He, Weiguo Cao, Tony D. James
Summary: Drug-induced liver injury (DILI) is a common cause of acute liver failure in the USA and Europe, but most cases can be recovered or prevented by discontinuing the offending drug. Recent research has found that peroxynitrite (ONOO-) can be used as a potential indicator for early diagnosis of DILI, and there is an urgent need to establish a method to detect and track peroxynitrite in DILI cases. In this study, a FRET-based nano fluorescent probe CD-N-I was developed, which showed high selectivity and sensitivity in detecting peroxynitrite. The probe successfully detected exogenous peroxynitrite in live cells and endogenous peroxynitrite in APAP-induced liver injury of HepG2 cells.
Article
Chemistry, Multidisciplinary
Dmitry L. Lipilin, Mikhail O. Zubkov, Mikhail D. Kosobokov, Alexander D. Dilman
Summary: This article describes a direct photocatalytic method for the thiolation of unprotected acids, which was previously challenging. By using a thionocarbonate reagent with an N-O bond, the efficient conversion of carboxylic acids to thiols is achieved.
Article
Chemistry, Multidisciplinary
Jason Malenfant, Lucille Kuster, Yohann Gagne, Kouassi Signo, Maxime Denis, Sylvain Canesi, Mathieu Frenette
Summary: Raman microscopy can reveal compound-specific vibrational fingerprints without sample preparation. The combination of efficient theoretical calculations and a user-friendly software can accurately predict peak positions and provide match scores to assist with structure determination.
Article
Chemistry, Multidisciplinary
Jayoh A. Hernandez, Paul S. Micus, Sean Alec Lois Sunga, Luca Mazzei, Stefano Ciurli, Gabriele Meloni
Summary: Essential trace metals play crucial roles in the survival and virulence of bacterial pathogens. Helicobacter pylori requires nickel for colonization and persistence in the stomach, and NixA is an essential nickel transporter in this process. This study characterizes the selectivity and electrogenic nature of NixA-mediated nickel transport.
Article
Chemistry, Multidisciplinary
Tarali Devi, Kuheli Dutta, Jennifer Deutscher, Stefan Mebs, Uwe Kuhlmann, Michael Haumann, Beatrice Cula, Holger Dau, Peter Hildebrandt, Kallol Ray
Summary: This study emphasizes the importance of subtle electronic changes and secondary interactions in the stability of biologically relevant metal-dioxygen intermediates. It also shows that the role of the chloride ligand in stabilizing the Fe-III-(OOBu)-Bu-t moiety can extend to other anions, including the thiolate ligand.
Article
Chemistry, Multidisciplinary
Jacqueline R. Santhouse, Jeremy M. G. Leung, Lillian T. Chong, W. Seth Horne
Summary: By studying the folding kinetics and mechanism of the BdpA sequence, researchers found that altering the backbone connectivity can affect protein folding. This suggests that protein mimetic chains have a significant degree of plasticity in transitioning between unfolded and folded states.
Article
Chemistry, Multidisciplinary
Divanshu Gupta, Ralf Einholz, Holger F. Bettinger
Summary: This study presents the first direct spectroscopic evidence of a cyclic seven-membered iminoborane. Compared to linear amino-iminoboranes, this cyclic iminoborane exhibits weakened bond strength and lower Lewis acidity value. The study suggests that the reduced ring strain of cyclic iminoborane prevents nitrogen fixation but allows facile (2 + 2) cycloaddition reaction with C2H4.
Article
Chemistry, Multidisciplinary
Renny Mathew, Aniruddha Mazumder, Praveen Kumar, Julie Matula, Sharmarke Mohamed, Petr Brazda, Mahesh Hariharan, Brijith Thomas
Summary: This study reveals the packing arrangement of partially disordered nitro-perylenediimide (NO2-PDI) using a synergistic approach that combines 3D ED, ssNMR, and DFT techniques. By overcoming these challenges, this methodology opens up new avenues for material characterization, driving exciting advancements in the field.
