Article
Chemistry, Multidisciplinary
Liqiong Liu, Weiliang Han, Fang Dong, Hua Feng, Zhicheng Tang
Summary: Two mesoporous catalysts were constructed for the catalytic combustion of propane, and it was found that the framework-confined Pt/Ti0.1AlOy-EISA catalyst showed better catalytic activity and thermal stability compared to the pore-confined Pt/Ti0.1AlOy-VI catalyst. The framework-confined catalyst had higher Pt dispersion, while the pore-confined catalyst exhibited better water and sulfur resistance due to the protection provided by the pores. In situ DRIFTS experiments suggested the Langmuir Hinshelwood (L-H) mechanism as the possible reaction mechanism.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Sebastien Noel, Eleonora Caronia, Herve Bricout, Iveta Chena Ticha, Stephane Menuel, Anne Ponchel, Sebastien Tilloy, Alessandro Galia, Eric Monflier, Jindrich Jindrich, Bastien Leger
Summary: Utilizing cinchonidine-functionalized beta-cyclodextrin as a stabilizing agent and chiral modifier, the preparation of platinum nanoparticles exhibited enhanced stability, catalytic activity, and enantioselectivity in the asymmetric hydrogenation of ethyl pyruvate. NMR and MALDI-MS analyses revealed the reduction of the cinchonidine graft during nanoparticle preparation.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Applied
Jing Tian, Jin Lin, Jisheng Zhang, Chungu Xia, Wei Sun
Summary: A family of manganese complexes derived from L-proline has been synthesized and characterized, showing different catalytic activities and enantioselectivities depending on the R group on the diamine backbone. Experimental results indicate that isopropyl substitution on the (R)peb ligand affects the catalytic reaction and prevents the use of H2O2 as an oxidant.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Materials Science, Composites
Lakshi Nandan Borah, Sudipta Halder, Pannalal Choudhury
Summary: This study aims to enhance the fracture properties of epoxy-based composites by adding cost-effective ball-milled graphitic nanoparticles. The ball-milled graphite nanoparticles achieved a significant reduction in particle size after 15 hours of dry milling and a similar reduction was achieved after 3 hours of wet milling. Incorporating these nanoparticles into the epoxy network resulted in a significant improvement in fracture toughness and energy.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Organic
Jesus de Maria Perez, Mateo Alajarin, Alberto Martinez-Cuezva, Jose Berna
Summary: The catalytic activity of degenerate succinamide-based [2]rotaxanes can be modulated by changes at their macrocyclic component. The variation in catalytic efficiency is correlated with the electronics and dynamics of the entwined macrocycle.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Apurve Saini, Katharina Theis-Broehl, Alexandros Koutsioubas, Kathryn L. Krycka, Julie A. Borchers, Max Wolff
Summary: The study investigates the assembly of magnetite nanoparticles in water-based ferrofluids near silicon substrates with different functionalization, showing that a magnetic field only promotes self-assembly when a seed layer is formed on the silicon substrate.
Article
Polymer Science
Alen Oseli, Alenka Vesel, Ema Zagar, Lidija Slemenik Perse
Summary: This study investigates the mechanisms of network formation using single-walled carbon nanotubes in polyethylene matrices, and finds that the network is constructed from SWCNT bundles at a specific critical volume fraction. The behavior of the bundles at different Phi(v,crit) values influences the configuration of the network.
Article
Chemistry, Applied
Yong Wang, Feng Cao, Yunlei Fu, Hanchu Chen, Yuxiang Zhang, Chuanqi Wang, Yanyan Li, Hui Wang
Summary: Poly(acrylonitrile-co-butadiene) nanoparticles were synthesized by semibatch microemulsion polymerization. The microstructure of the polymers was characterized by 1H NMR and FT-IR. The particle size of the nitrile butadiene rubber (NBR) latex could be well controlled by reaction temperature, surfactant concentration, and feeding time of monomer. The minimum particle size of 34.2 nm could be achieved by using the surfactant/ monomer mass fraction of 7.9 wt%. The latex can be directly catalyzed for hydrogenation using Wilkinson's catalyst (RhCl(PPh3)3) and second generation Grubbs catalyst (Grubbs II), respectively. The hydrogenated products (HNBR) with a degree of hydrogenation above 95 mol% were obtained. The fast rate of hydrogenation demonstrates the unique advantages of small particle size.
Review
Chemistry, Physical
Xiao-Long He, Cheng Wang, You-Wu Wen, Zhouyu Wang, Shan Qian
Summary: With the rapid growth of asymmetric catalysis, the construction of pentatomic heterobiaryls has received significant attention. Various catalytic asymmetric strategies have been established, leading to the proliferation of unprecedented pentatomic atropisomers.
Article
Chemistry, Multidisciplinary
Julia C. Steinbach, Fabio Fait, Hermann A. Mayer, Andreas Kandelbauer
Summary: Mesoporous silica microspheres (MPSMs) were synthesized using a hard template method to control particle size and pore properties. Response surface methodology was applied to predict the effects of synthesis parameters on MPSM characteristics. The prepared MPSMs were successfully applied as stationary phase for reversed-phases liquid chromatography, achieving protein and amino acid separation.
Article
Engineering, Chemical
Hailin Zhao, Bingjing Tang, Jie Tang, Yafeng Cai, Yao Cui, Hao Liu, Li Wang, Yunsong Wang, Wangcheng Zhan, Yanglong Guo, Yun Guo
Summary: It was found that depositing Pt on Na+ ion-exchanged ZSM-5 can enhance the catalytic efficiency of Pt/Na-ZSM-5 catalyst for formaldehyde oxidation, and tuning the surface acidity/basicity and noble metal state can reduce the usage of noble metal.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Tae Yong Yoo, Jongmin Lee, Sungjun Kim, Min Her, Shin-Yeong Kim, Young-Hoon Lee, Heejong Shin, Hyunsun Jeong, Arun Kumar Sinha, Sung-Pyo Cho, Yung-Eun Sung, Taeghwan Hyeon
Summary: English Summary: Researchers have successfully synthesized a bimetallic compound that thermally decomposes to produce sub-5 nm-sized intermetallic Pt-Co nanoparticles with carbon protection. These nanoparticles exhibit high catalytic activity, high electrochemical surface area, N-doping, and high stability, which promote oxygen mass transfer and proton conduction. In the single cell configuration, the catalyst achieved unprecedented rated power densities and minimal voltage loss.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Biomaterials
Longyi Chen, Songlin Yang, Michelle Dotzert, C. W. James Melling, Jin Zhang
Summary: A hybrid rGO-based MR sensor has been developed to monitor blood glucose levels and quickly detect hypoglycemia. The sensor shows a large negative MR at room temperature under a small magnetic field. A two-step process using a sandwich structural MR sensor has been developed to quickly detect low concentration of glucose in a small amount of blood. The sensor has demonstrated accuracy in measuring low concentration of plasma glucose.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Qinglan Li, Li Ji, Beibei Jiang, Xiangguang Li, Zhaoji Lv, Jinpo Xie, Siping Chen, Kailin Xu, Yingwei Yang, Suqing Zhao
Summary: By employing a supramolecular capping strategy, Rh@CPA NPs with excellent catalytic and photothermal ablation capabilities were synthesized, showing great potential in reducing toxic compounds and combating bacteria. This study extends the application scope of novel materials, holding significant practical value.
CHEMICAL COMMUNICATIONS
(2022)
Article
Polymer Science
Noemi Jardon-Maximino, Gregorio Cadenas-Pliego, Carlos A. Avila-Orta, Victor Eduardo Comparan-Padilla, Luis E. Lugo-Uribe, Marissa Perez-Alvarez, Salvador Fernandez Tavizon, Gerardo de Jesus Sosa Santillan
Summary: The study explored the performance and antibacterial activity of CuNPs functionalized with PEI and GABA with iPP composite materials, showing CuNPs can act as nucleating agents in iPP crystallization. The composites exhibited high antibacterial activity, slightly reduced thermal stability but improved crystallinity and storage modulus.
Article
Chemistry, Physical
Jonathan Quinson, Sebastian Kunz, Matthias Arenz
Summary: The ultimate research goal in catalysis is to develop new catalysts with superior activity, stability, and selectivity. However, a complete understanding of the factors influencing the performance of supported catalysts remains challenging. Systematic studies that change one experimental parameter at a time provide detailed insights into optimizing supported precious metal nanoparticles for energy and chemical conversion processes.
Article
Chemistry, Physical
Jonathan Quinson, Alexandra Dworzak, Soren B. Simonsen, Luise Theil Kuhn, Kirsten M. O. Jensen, Alessandro Zana, Mehtap Oezaslan, Jacob J. K. Kirkensgaard, Matthias Arenz
Summary: The controlled synthesis of surfactant-free Pt NPs was studied under various conditions, revealing that the NaOH/Pt molar ratio significantly affects the kinetics of NP formation. NPs with a diameter of approximately 1 nm can be rapidly formed at a NaOH/Pt molar ratio of 10-20.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Marco Moors, Jonas Warneke, Xavier Lopez, Coen de Graaf, Bernd Abel, Kirill Yu Monakhov
Summary: This paper highlights recent experimental and theoretical research on the development of polyoxometalates (POMs) as potential active switching units in molecule-based memory cells, with a focus on stable metal-oxo bonds and optimization methods for vanadium-containing POMs on surfaces. Moreover, important challenges in the field of POM-based nanoelectronics are critically discussed.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Physical
Francesco Bizzotto, Jonathan Quinson, Johanna Schroder, Alessandro Zana, Matthias Arenz
Summary: Water electrolysis is a key technology for transitioning towards a renewable energy system, with iridium being essential for synthesizing catalysts for the oxygen evolution reaction. Research shows that carbon-supported iridium oxide catalysts synthesized from surfactant-free colloidal iridium nanoparticles exhibit high dispersion and activity; the choice of suitable monoalcohol solvent can determine the maximum iridium loading on the support without detrimental particle agglomeration.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Jia Du, Jonathan Quinson, Alessandro Zana, Matthias Arenz
Summary: The study demonstrates that the Pt-Au nanocomposite exhibits improved ORR activity and stability compared to the benchmark, in both RDE and GDE measurements. On the other hand, the Pt-Ir nanocomposite shows better stability but lower ORR activity. By combining the GDE approach with small-angle X-ray scattering, it is shown that the improved stability of the Pt-Au nanocomposite is due to reduced Pt particle growth caused by the adjacent Au NPs.
Article
Chemistry, Physical
Masanori Inaba, Alessandro Zana, Jonathan Quinson, Francesco Bizzotto, Carsten Dosche, Alexandra Dworzak, Mehtap Oezaslan, Soren Bredmose Simonsen, Luise Theil Kuhn, Matthias Arenz
Summary: This study successfully disentangles the effects of particle size and interparticle distance on the ORR activity using a new synthetic method, and demonstrates the influence of interparticle distance on the electronic properties of nanoparticles through operando X-ray absorption spectroscopy.
Article
Chemistry, Multidisciplinary
Daniel Loof, Oliver Thueringer, Marco Schowalter, Christoph Mahr, Anmona Shabnam Pranti, Walter Lang, Andreas Rosenauer, Volkmar Zielasek, Sebastian Kunz, Marcus Baeumer
Summary: Porous networks of Pt nanoparticles interlinked by bifunctional organic ligands were synthesized with new variants introduced by varying the ligands. These networks exhibited mesoporous structures and superior thermal stability, showing potential for applications in hydrogen gas sensors and heterogeneous catalysis.
Article
Chemistry, Multidisciplinary
Johanna Schroeder, Sarah Neumann, Jonathan Quinson, Matthias Arenz, Sebastian Kunz
Summary: The study found that in polyol synthesis, controlling the size of nanoparticles (NPs) depends more on the nature of the precursor (metal salt) rather than the anion present in the base. For certain precursors such as H2PtCl6 or H2Pt(OH)(6), the size control depends on the base anion/Pt molar ratio.
Article
Chemistry, Analytical
Hugo Y. Samayoa-Oviedo, Kay-Antonio Behrend, Sebastian Kawa, Harald Knorke, Pei Su, Mikhail E. Belov, Gordon Anderson, Jonas Warneke, Julia Laskin
Summary: The development of a new instrument allows for high-flux electrospray ionization-based soft landing of mass-selected fragment ions onto surfaces, enabling high-coverage deposition and investigation of gaseous fragment ions reactivity in the condensed phase. The observed reactions of deposited fragment ions depend on the ion structure and the composition of co-deposited species on the surface.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Qinqin Yuan, Markus Rohdenburg, Wenjin Cao, Edoardo Apra, Johannes Landmann, Maik Finze, Jonas Warneke, Xue-Bin Wang
Summary: The study reports the observation of a highly stable metal-free hexacyanodiborate dianion [B-2(CN)(6)](2-) in the gas phase, with an electron binding energy of 1.9 eV and a repulsive Coulomb barrier of around 2.60 eV. Quantum chemical calculations show a D-3d staggered conformation for both the dianion and radical monoanion, with calculated values matching experimental results well. The simulated density of states spectrum reproduces all measured electronic transitions, indicating significant auto-photodetachment via electronically excited dianion resonances.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Fangshun Yang, Marco Moors, Duc Anh Hoang, Sebastian Schmitz, Markus Rohdenburg, Harald Knorke, Ales Charvat, Xue-Bin Wang, Kirill Yu. Monakhov, Jonas Warneke
Summary: The immobilization of polyoxovanadate anions on conducting substrates shows promise for molecule-based memory technologies, with the use of cyclodextrin-functionalized hexavanadates allowing for stable host-guest complexes to be deposited as single memory units. The multistate switching observed is attributed to reduction of individual vanadium (+V) centers, opening up new possibilities for the development of molecular memory technologies.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Irina Werner, Jan Griebel, Albert Masip-Sanchez, Xavier Lopez, Karol Zaleski, Piotr Kozlowski, Axel Kahnt, Martin Boerner, Ziyan Warneke, Jonas Warneke, Kirill Yu Monakhov
Summary: A series of polyoxovanadate cages functionalized with phthalocyaninato lanthanide moieties were synthesized and studied. These compounds exhibit both intra- and intermolecular electron transfer, which can be controlled by different lanthanide ions. This work opens up new possibilities for the development of materials with charge-separated states and relaxation dynamics, which are important for applications in quantum technologies and neuromorphic computing.
INORGANIC CHEMISTRY
(2022)
Review
Chemistry, Physical
Jonathan Quinson, Sebastian Kunz, Matthias Arenz
Summary: Colloidal syntheses of nanomaterials are beneficial for the study and optimization of unsupported and supported catalysts, especially precious metal nanoparticles. The separation of nanoparticle synthesis from supporting steps allows for deeper knowledge and control of catalyst properties. However, the use of additives or surfactants in most colloidal syntheses can hinder catalytic reactions, requiring surfactant removal and adding complexity to the process. Developing surfactant-free strategies, such as laser synthesis and processing, is a rising field of research that is detailed in this review, with a focus on heterogeneous catalysis and electrocatalysis.
Article
Chemistry, Multidisciplinary
Markus Rohdenburg, Ziyan Warneke, Harald Knorke, Maik Icker, Jonas Warneke
Summary: Mass spectrometry can be used to generate and study elusive gas phase ions that cannot be synthesized in solution or bulk. In this study, the reactive fragment anion [B12Br11](-) was generated and converted to [B12Br11N2](-) on surfaces, which has not been synthetically obtained before. The molecular structure of [B12Br11N2](-) was confirmed using conventional methods, and it was found to be stable on surfaces and in solution. Thermal annealing of [B12Br11N2](-) allowed access to the highly reactive intermediate [B12Br11](-), which can be used as a reagent for various chemical transformations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Ricarda Puett, Piotr Kozlowski, Irina Werner, Jan Griebel, Sebastian Schmitz, Jonas Warneke, Kirill Yu Monakhov
Summary: The newly synthesized compounds (nBu(4)N)(4)[HWD-Py(MPc)] exhibit different magnetic properties depending on the metal M, with M = Yb showing monomeric, single-ion paramagnetism and M = Y containing dimers with radical character. The results of electronic paramagnetic resonance spectroscopy, SQUID magnetometry, and magnetochemical calculations reveal intramolecular and intermolecular charge transfer processes within these unique transition-metal/lanthanide complex-POM hybrid compounds.
INORGANIC CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
