Article
Chemistry, Multidisciplinary
Victor Ribay, Arnab Dey, Benoit Charrier, Clement Praud, Joris Mandral, Jean-Nicolas Dumez, Marine P. M. Letertre, Patrick Giraudeau
Summary: Hyperpolarized nuclear magnetic resonance (NMR) methods, particularly Dissolution Dynamic Nuclear Polarization (d-DNP), greatly enhance the sensitivity of detecting C-13 NMR signals. This study demonstrates the first application of d-DNP-enhanced C-13 NMR analysis of biofluid (urine) at natural abundance, providing unprecedented resolution and sensitivity. Accurate quantitative information on multiple targeted metabolites can be obtained through a standard addition procedure.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Arianna Ferrari, Josh Peters, Mariia Anikeeva, Andrey Pravdivtsev, Frowin Ellermann, Kolja Them, Olga Will, Eva Peschke, Hikari Yoshihara, Olav Jansen, Jan-Bernd Hoevener
Summary: This article describes the setup, operational procedures, and performance of a cryogen-free device for producing hyperpolarized contrast agents in a preclinical imaging center. The polarization process was optimized to achieve a high polarization level. After injection, the distribution of different metabolites was observed using imaging techniques.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Chang Qi, Yunyi Wang, Christian Hilty
Summary: Nuclear spin relaxation dispersion parameters can serve as indicators of the binding mode of a ligand to a protein. Hyperpolarization techniques, such as dissolution dynamic nuclear polarization, can provide signal enhancement without the need for isotope enrichment, offering an alternative method for determining ligand binding modes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
David Guarin, Diego Carnevale, Mathieu Baudin, Philippe Pelupessy, Daniel Abergel, Geoffrey Bodenhausen
Summary: In this study, the buildup of proton polarization due to dynamic nuclear polarization (DNP) was monitored by observing echoes instead of FIDs. It was found that under DNP conditions, the proton coherence lifetime was extended, leading to transient surges in spin echo amplitudes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Analytical
Estelle Morvan, Nada Taib-Maamar, Axelle Grelard, Antoine Loquet, Erick J. Dufourc
Summary: Understanding the membrane dynamics of complex systems is crucial to understanding their function. This study explores NMR methods to filter highly mobile molecular parts from more restricted environments. The researchers developed a quantitative MAS C-13 NMR approach coupled with CP and/or INEPT techniques to study rigid and fluid model membranes. They found that INEPT can detect only very mobile lipid headgroups in gel phases, while CP is required to detect the rigid parts. The study also reveals the potential of C-13 NMR chemical shift to monitor order-disorder phase transitions and provide information about membrane dynamics without isotopic labeling.
ANALYTICAL CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
F. Holzmeier, J. Joseph, J. C. Houver, M. Lebech, D. Dowek, R. R. Lucchese
Summary: This study characterizes time delays in molecular photoionization as a function of the ejected electron emission direction relative to the orientation of the molecule and the light polarization axis. By comparing resonance computed in e-NO+ scattering, it highlights the connection of photoionization delays with Wigner scattering time delays, providing insights into the attosecond dynamics induced by extreme ultraviolet or X-ray one-photon absorption.
NATURE COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Vladimir V. Kavtanyuk, Hyun Joon Lee, Sangwon Oh, Keunhong Jeong, Jeong Hyun Shim
Summary: In this study, we demonstrated optical hyperpolarization of C-13 nuclei at low magnetic field and room temperature. By continuously irradiating the sample with laser and microwave, we achieved polarization of the C-13 nuclei. The C-13 polarization was found to depend on the power of laser and microwave, and a triplet structure corresponding to N-14 hyperfine splitting was observed for the first time. By exciting three microwave frequencies simultaneously, we achieved a 90,000-fold enhancement of C-13 polarization.
Article
Chemistry, Multidisciplinary
Adam P. Gaunt, Jennifer S. Lewis, Friederike Hesse, Tian Cheng, Irene Marco-Rius, Kevin M. Brindle, Arnaud Comment
Summary: The study demonstrates that free radicals generated in alpha-ketoglutaric acid can be used to hyperpolarize C-13 molecules, showing potential applications in in vivo metabolic research. This radical precursor exhibits excellent safety and convenience, providing a new approach for future human studies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Junjie Ma, Marco C. Pinho, Crystal E. Harrison, Jun Chen, Chenhao Sun, Edward P. Hackett, Jeff Liticker, James Ratnakar, Galen D. Reed, Albert P. Chen, A. Dean Sherry, Craig R. Malloy, Steven M. Wright, Christopher J. Madden, Jae Mo Park
Summary: This study investigated time-resolved C-13 MR spectroscopy as an alternative method to imaging for assessing pyruvate metabolism in the human brain using hyperpolarized [1-C-13]pyruvate. The results showed that the measured metabolic parameters and conversion rate constants were consistent and reproducible, and that the technique could be used as an affordable and reliable alternative to traditional imaging methods for studying cerebral metabolism.
MAGNETIC RESONANCE IN MEDICINE
(2022)
Article
Chemistry, Physical
Yifan Quan, Yifu Ouyang, Michael Mardini, Ravi Shankar Palani, Daniel Banks, James Kempf, W. Tom Wenckebach, Robert G. G. Griffin
Summary: We propose a new mechanism for dynamic nuclear polarization called Resonant Mixing (RM). It arises from the evolution of the density matrix for a simple electron-nucleus coupled spin pair subject to weak microwave irradiation, similar to the solid effect. However, unlike the solid effect, RM is optimal when the microwave field is on-resonance and involves the mixing of states by the microwave field together with the electron-nuclear coupling. We argue that this mechanism is responsible for the observed dispersive-shaped DNP field profile for trityl samples near the electron paramagnetic resonance center.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Marie Juramy, Paolo Cerreia Vioglio, Fabio Ziarelli, Stephane Viel, Pierre Thureau, Giulia Mollica
Summary: This study monitored the crystallization process of glycine using solid-state nuclear magnetic resonance strategy, revealing that crystallizing additives have a positive impact on DNP signal enhancement, even in the absence of glycerol in the crystallizing solution.
SOLID STATE NUCLEAR MAGNETIC RESONANCE
(2022)
Article
Multidisciplinary Sciences
Hwa Seob Choi, Shunning Li, In-Hyeok Park, Weng Heng Liew, Ziyu Zhu, Ki Chang Kwon, Lin Wang, In-Hwan Oh, Shisheng Zheng, Chenliang Su, Qing-Hua Xu, Kui Yao, Feng Pan, Kian Ping Loh
Summary: The authors demonstrate that the coercive field of organic perovskite materials can be increased by modulating the strength of hydrogen bonds, and highlight the potential for tailoring the coercive field by tuning hydrogen bond strength.
NATURE COMMUNICATIONS
(2022)
Review
Engineering, Biomedical
Michal Fiedorowicz, Michal Wieteska, Katarzyna Rylewicz, Bartosz Kossowski, Ewa Piatkowska-Janko, Anna M. Czarnecka, Beata Toczylowska, Piotr Bogorodzki
Summary: Hyperpolarized C-13 tracers, enhanced with the DNP technique, allow real-time detection of metabolites in living organisms with high temporal resolution, showing potential in clinical trials for various diseases. However, the relatively short half-life of these tracers remains a limitation for their application.
BIOCYBERNETICS AND BIOMEDICAL ENGINEERING
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Cornelius von Morze, Tyler Blazey, Richard Baeza, Ruslan Garipov, Timothy Whitehead, Galen D. Reed, Joel R. Garbow, Kooresh Shoghi
Summary: Through the design and testing of an advanced HP C-13 MRI pulse sequence strategy, we have demonstrated the feasibility of advanced C-13 imaging approaches on a compact PET/MR imaging platform, maximizing the potential of HP C-13 technology and facilitating direct comparison with positron emission tomography.
MAGNETIC RESONANCE IN MEDICINE
(2022)
Article
Chemistry, Multidisciplinary
Saiya Fujiwara, Naoto Matsumoto, Koki Nishimura, Nobuo Kimizuka, Kenichiro Tateishi, Tomohiro Uesaka, Nobuhiro Yanai
Summary: Utilizing the induced-fit-type structural transformation of a metal-organic framework (MOF), we demonstrate DNP of guest molecules at around room temperature, resulting in enhanced NMR signal.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Chao Chen, Rohit Mahar, Matthew E. Merritt, David L. Denlinger, Daniel A. Hahn
Summary: Metabolic suppression is a key feature of animal dormancy, helping animals save energy. Previous studies have shown that periodic arousal is driven by an increase in aerobic metabolism, with predictable fluctuations in molecules related to energy metabolism during these cycles. ROS signaling regulates periodic arousal by changing the activity of critical metabolic enzymes, suggesting its potential importance in regulating other metabolic cycles during dormancy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Biochemistry & Molecular Biology
Mukundan Ragavan, Mengchen Li, Anthony G. Giacalone, Charles E. Wood, Maureen Keller-Wood, Matthew E. Merritt
Summary: Ovine models have been widely used for studying maternal-fetal interactions and congenital heart diseases. This study demonstrates a comprehensive assessment of heart function and metabolism in a perinatal model, with the use of [U-C-13]glucose as a tracer to study central energy metabolism. The methodology presented can be applied to investigate acute and chronic effects of hormonal signaling in future studies.
Article
Radiology, Nuclear Medicine & Medical Imaging
Rohit Mahar, Huadong Zeng, Anthony Giacalone, Mukundan Ragavan, Thomas H. Mareci, Matthew E. Merritt
Summary: This study demonstrates for the first time the metabolic imaging of HDO as a marker of glucose, lactate, and glutamate/glutamine metabolism. The generation of HDO in the brain is linearly related to the appearance of lactate and glutamate/glutamine in the appropriate pseudo-steady state window. Selective imaging of HDO and glucose can be easily achieved using a gradient-echo method.
MAGNETIC RESONANCE IN MEDICINE
(2021)
Article
Endocrinology & Metabolism
Chris E. Shannon, Mukundan Ragavan, Juan Pablo Palavicini, Marcel Fourcaudot, Terry M. Bakewell, Ivan A. Valdez, Iriscilla Ayala, Eunsook S. Jin, Muniswamy Madesh, Xianlin Han, Matthew E. Merritt, Luke Norton
Summary: Insulin resistance and altered hepatic mitochondrial function are key features of type 2 diabetes (T2D) and non-alcoholic fatty liver disease (NAFLD). This study found that insulin sensitization with pioglitazone can mitigate mitochondrial dysfunction in the liver, which is independent of changes in hepatic lipid accumulation. The research highlights potential therapeutic targets for T2D and NAFLD, emphasizing the benefits of insulin sensitization in managing obesity-related diseases.
MOLECULAR METABOLISM
(2021)
Article
Biochemical Research Methods
Keith A. Michel, Mukundan Ragavan, Christopher M. Walker, Matthew E. Merritt, Stephen Y. Lai, James A. Bankson
Summary: This study compared two commonly used HP spectroscopic imaging methods for HP [1-C-13]pyruvate imaging scans at 7T, finding that images acquired with spectral-spatial excitation and CSE had effectively equivalent SNR with identical effective excitation angles.
JOURNAL OF MAGNETIC RESONANCE
(2021)
Article
Endocrinology & Metabolism
Joseph A. Henry, Ram B. Khattri, Joy Guingab-Cagmat, Matthew E. Merritt, Timothy J. Garrett, Joshua T. Patterson, Kathryn E. Lohr
Summary: This study focused on comparing metabolomic profiles of unique genotypes of the threatened coral Acropora cervicornis, aiming to identify key metabolites driving separation among genotypes and improve restoration efforts. Results showed significant variation in metabolite profiles among A. cervicornis genotypes, indicating differences in metabolome structure could influence phenotypic variation among genotypes.
Article
Biotechnology & Applied Microbiology
Mohsin Rahim, Mukundan Ragavan, Stanislaw Deja, Matthew E. Merritt, Shawn C. Burgess, Jamey D. Young
Summary: Metabolic flux analysis is a method that combines experimental measurements and computational modeling to determine reaction rates in biological systems. This study introduces a software tool called INCA 2.0, which can integrate isotopomer measurements from both MS and NMR platforms and estimate metabolic fluxes with flexibility. The results demonstrate that INCA 2.0 accurately simulates and analyzes NMR datasets, outperforming other established tools. Additionally, combining NMR and MS datasets improves the precision of estimated fluxes.
METABOLIC ENGINEERING
(2022)
Article
Physiology
Mukundan Ragavan, Marc A. McLeod, Anna Rushin, Matthew E. Merritt
Summary: The role of ketones in metabolic health has evolved over time, from being considered a simple byproduct to playing a central role in various diseases. This study found that ketones can be produced from carbohydrates, but only when the activity of pyruvate dehydrogenase is upregulated.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Taylor L. Johnston, Arthur S. Edison, Vijaykumar Ramaswamy, Nicolas Freytag, Matthew E. Merritt, Jeremy N. Thomas, Jerris W. Hooker, Ilya M. Litvak, William W. Brey
Summary: Significant sensitivity improvements have been achieved by using high temperature superconducting resonators in nuclear magnetic resonance probes. This study investigates the use of multi-arm spiral resonators to increase the excitation field for C-13 nuclei and preliminary tests show that they may produce a stronger excitation field.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Editorial Material
Radiology, Nuclear Medicine & Medical Imaging
Matthew E. Merritt
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2022)
Article
Cell Biology
Smitha Pillai, Iqbal Mahmud, Rohit Mahar, Crystal Griffith, Michael Langsen, Jonathan Nguyen, Jonathan W. Wojtkowiak, Pawel Swietach, Robert A. Gatenby, Marilyn M. Bui, Matthew E. Merritt, Patricia McDonald, Timothy J. Garrett, Robert J. Gillies
Summary: The accumulation of cytoplasmic lipid droplets in malignant tumors is an adaptive response to extracellular acidity, with the acid-sensing receptor OGR1 playing a crucial role in triggering this process. Depletion of OGR1 inhibits the formation of lipid droplets under acidic conditions, impacting cell survival.
Article
Multidisciplinary Sciences
Anthony G. Giacalone, Matthew E. Merritt, Mukundan Ragavan
Summary: Metabolic diseases are on the rise, and understanding liver metabolism is crucial. Ex vivo liver perfusion combined with NMR allows for comprehensive analysis and reproducible results.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2022)
Article
Chemistry, Analytical
Jiajun Lei, Rohit Mahar, Mario C. Chang, James Collins, Matthew E. Merritt, Timothy J. Garrett, Richard A. Yost
Summary: Building an accurate lipid inventory requires coordinated information from different analytical capabilities. Integrating LC, HRMS, MS/MS, and 1H NMR would be ideal for this purpose. LC-HRMS/MS provides lower-level structural information with high sensitivity, while 1H NMR provides higher-order structural information for the differentiation of isomers. Digitizing the LC eluent and splitting it into two flows for HRMS/MS and NMR allows for correlation of MS and NMR data based on chromatographic retention time.
ANALYTICAL CHEMISTRY
(2023)
Article
Nutrition & Dietetics
Mario C. Chang, Stephen J. Staklinski, Vinay R. Malut, Geraldine L. Pierre, Michael S. Kilberg, Matthew E. Merritt
Summary: The natural amino acid asparagine (Asn) is essential for cell function and proliferation. While healthy cells can synthesize Asn, cancer and genetically diseased cells rely on extracellular sources. Deficiency in asparagine synthetase (ASNS), the enzyme responsible for Asn synthesis, leads to congenital microcephaly, seizures, and brain atrophy. In this study, metabolomics analysis of ASNS-deficient cells revealed disruptions in various metabolites, along with decreased TCA cycle intermediates and anaplerotic substrates in response to Asn deprivation. Pantothenate, phenylalanine, and aspartate were identified as potential biomarkers of Asn deprivation, suggesting the possibility of a novel diagnostic method for ASNS deficiency using targeted biomarker analysis from a blood draw.
Article
Biochemical Research Methods
Mario C. Chang, Stephen J. Staklinski, Matthew E. Merritt, Michael S. Kilberg
Summary: Asparagine synthetase deficiency (ASNSD) is an inborn error of metabolism caused by mutations in the ASNS gene, resulting in insufficient production of asparagine and impacting fetal brain development. This study presents a simple method to evaluate the effect of ASNS variants on enzymatic activity.
BIOLOGY METHODS & PROTOCOLS
(2023)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
