Article
Chemistry, Physical
Marwa Abdelmouleh, Mathieu Lalande, Edith Nicol, Gilles Frison, Guillaume van der Rest, Jean-Christophe Poully
Summary: It has been shown that 18-crown-6-ether plays a more active role in chemical processes during activation in mass spectrometers, abstracting protons or protonated molecules from peptides and potentially changing binding sites. Experimental and theoretical results support this new perspective.
Article
Chemistry, Multidisciplinary
Todd N. Poe, Sarah Molinari, Samantha Justiniano, Grace M. McLeod, Thomas E. Albrecht-Schonzart
Summary: Three Ln(II) 18-crown-6 complexes were synthesized and characterized, showing differences in crystal structure, molecular packing, and spectroscopic features. Distinct absorption and photoluminescence behaviors were observed, setting them apart from other similar systems.
CRYSTAL GROWTH & DESIGN
(2022)
Review
Spectroscopy
Simon Albertini, Elisabeth Gruber, Fabio Zappa, Sergiy Krasnokutskiy, Felix Laimer, Paul Scheier
Summary: This review summarizes the development of experimental techniques and methods for studying helium droplets, which provide an ideal environment for growing complexes and clusters under conditions that mimic cold and dense regions of the interstellar medium. Recent results enabled by these techniques have shed light on barrierless reactions triggered by radicals or ions at sub-Kelvin temperatures.
MASS SPECTROMETRY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Anirban Basu
Summary: The crown ether 18-crown-6 has the potential to suppress fibrillation in lysozyme and decrease the protein's β-sheet content, thus inhibiting the formation of amyloid fibrils. These findings can be utilized to develop more effective anti-amyloidogenic agents.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Irina A. Kuz'mina, Mariia A. Kovanova, Anna S. Udalova
Summary: The Gibbs free energies and enthalpies of transfer and dissolution of dibenzo-18-crown-6 ether in different solvent mixtures were determined in this study. The solvent composition was found to have limited impact on the solvation state of the crown ether, and a compensation effect between enthalpy and entropy contributions was observed. The resolvation of the crown ring oxygen atoms was identified as the main factor influencing the thermodynamic characteristics of the solvation process.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Elena Merzlyakova, Silke Wolf, Sergei Lebedkin, Lkhamsuren Bayarjargal, B. Lilli Neumeier, Daniel Bartenbach, Christof Holzer, Wim Klopper, Bjoern Winkler, Manfred Kappes, Claus Feldmann
Summary: A series of transition metal crown-ether coordination compounds were synthesized using ionic liquids, showing both conventional and unusual structural motifs. Some of these compounds exhibit outstanding photoluminescence properties, with high quantum yields observed for compounds like ZnI2, Mn2I4 (18-crown-6)(2), EuBr2, and EuI2. The optical properties and structural features of these compounds were characterized through various analytical techniques, revealing unique and efficient luminescent behavior.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Thermodynamics
Olga A. Zakurdaeva, Irina O. Kuchkina, Tikhon S. Kurkin, Sergey V. Nesterov
Summary: The thermal stability of macrocyclic complexes with alkaline earth metal salts was studied in this research. The size of the cation and anion was found to affect the stability, with Ba2+ < Sr2+ < Ca2+ and Cl- < Br- ≈ I-. The complexes with CaCl2, SrBr2, and SrI2 exhibited a two-stage destruction mechanism, suggesting the coexistence of two conformationally nonequivalent forms of the macrocycles.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Multidisciplinary
Snehasis Dutta, Trilochan Gadly, Amey P. Wadawale, Mayur Darekar, Sulekha Mukhopadhay, Sunil K. Ghosh, Birija S. Patro
Summary: This paper presents a novel method for the synthesis and purification of DTBDB18C6, as well as the heterogeneous catalytic hydrogenation of DTBDB18C6 to DTBDCH18C6. The synthesis of DTBDB18C6 was successfully scaled up to a 5 kg scale, and the purification process was developed and scaled up to a 300 g scale. The hydrogenation of DTBDB18C6 to DTBDCH18C6 was achieved with a rhodium on alumina catalyst, and the addition of K+ ions in the reaction mixture enhanced the reaction yield to 75%. The synthesized DTBDCH18C6 exhibited high distribution coefficients for the extraction of strontium.
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Zibin Zhang, Yu Yao, Lang He, Tao Hong, Shijun Li, Feihe Huang, Peter J. Stang
Summary: Coordination-driven self-assembly was utilized to construct two metallacycles using a dicarboxylate-functionalized dibenzo-18-crown-6 in combination with either a 0 degrees anthracene-based clip-type acceptor or a 60 degrees phenanthrene-based acceptor. The angularities of these components enabled the formation of a [2 + 2] rectangle and a [3 + 3] triangle, respectively. The synthesis, characterization, and host-guest chemistry of the two metallacycles were described and supported by 31P{1H}, 1H NMR spectra, and electrospray mass spectrometry. (c) 2022 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Hae Sook Park, Byung Jin Byun, Young Kee Kang
Summary: The conformational preferences of Leu-Enkephalin (Leu-Enk) were investigated using conformational search and density functional theory (DFT) calculations. The study found that neutral Leu-Enk adopts a folded structure in the gas phase, while zwitterionic Leu-Enk exhibits a folded structure stabilized by double beta-bends in water. These findings provide insights into the conformational characteristics of Leu-Enk in different environments.
Article
Chemistry, Multidisciplinary
Yi-Rong Li, Yun-Fang Zhang, Yuan-Yuan Tang, Han-Yue Zhang
Summary: We discovered that [(histamine)(18-crown-6)(2)][BF4](2) is a high-temperature host-guest inclusion complex that exhibits decent piezoelectric properties and potential ferroelectricity. This work provides a new idea for constructing host-guest inclusion piezoelectrics.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Sam Y. Thompson, Lauren A. Devenney, Dmitry S. Yufit, John S. O. Evans
Summary: In this study, the temperature and thermal history dependence of polymorphic phase transitions in the multiaxial molecular ferroelectric 18-crown-6 oxonium tetrachloro-gallium(III) were explored. The structures of two previously suggested polymorphs (D and Y) were solved from high-temperature powder diffraction data, and a new polymorph (X) was identified using low-temperature powder diffraction data. Another polymorph (W) that can form on cooling was also discovered. The ferroelectric properties of the various polymorphs were rationalized based on the structural findings.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Energy & Fuels
Xiangnan Sun, Fei Deng, Siqi Li, Yao Li, Xinding Lv, Yan-Zhen Zheng, Xia Tao
Summary: This study introduces crown ether molecules to modify FACsPbI3 films, which improves the stability of perovskite solar cells and achieves a high power conversion efficiency (PCE).
Article
Chemistry, Multidisciplinary
Mostafa Ghasemisarabbadieh, Sveinbjorn Gizurarson, Benjamin Ragnar Sveinbjornsson
Summary: The study showed that 18-crown-6 has a stabilizing effect on oxytocin in citrate/phosphate buffer but a destabilizing effect in acetate buffer, possibly due to its binding to the protonated ammonium group of oxytocin. The effects observed were concentration-dependent, with higher concentrations of 18-crown-6 leading to stronger effects. The presence of 18-crown-6 also resulted in observable shifts in the retention time of oxytocin peaks in high-performance liquid chromatography experiments, supporting the binding hypothesis. Ultraviolet and nuclear magnetic resonance spectroscopy experiments further confirmed the impact of 18-crown-6 on oxytocin spectra.
Article
Chemistry, Inorganic & Nuclear
Ning Song, Ting-Ting Ying, Yu-Hui Tan, Yun-Zhi Tang, Juan Liao, Li-Juan Wang, Fang-Xin Wang, Ming-Yang Wan
Summary: Ferroelectric materials are important electronic functional materials with good application prospects. It is urgent to develop new ferroelectric material systems. Crown ethers have the ability to complex with positive ions, which is useful in synthesis. We report a compound (1) with a phase transition temperature of 255 K and obvious SHG switch below that temperature, demonstrating its ferroelectric nature. The compound also shows a symmetry break from the paraelectric phase to the ferroelectric phase in the second harmonic response test. This work is expected to promote the exploration and synthesis of organic crown ether ferroelectric materials.
DALTON TRANSACTIONS
(2023)
Article
Multidisciplinary Sciences
Carla Kirschbaum, Kim Greis, Eike Mucha, Lisa Kain, Shenglou Deng, Andreas Zappe, Sandy Gewinner, Wieland Schoellkopf, Gert von Helden, Gerard Meijer, Paul B. Savage, Mateusz Marianski, Luc Teyton, Kevin Pagel
Summary: This study investigates isomerism in immunologically relevant glycolipids using cryogenic gas-phase infrared spectroscopy, and shows that their structural features can be accurately resolved based on a narrow spectral fingerprint region.
NATURE COMMUNICATIONS
(2021)
Article
Biochemical Research Methods
Carla Kirschbaum, Kim Greis, Maike Lettow, Sandy Gewinner, Wieland Schoellkopf, Gerard Meijer, Gert von Helden, Kevin Pagel
Summary: This study successfully investigates unsaturated fatty acid double bond isomers in the gas phase without chemical treatment or modification of the ion source, by forming non-covalent adducts. Combining cryogenic gas-phase infrared spectroscopy, ion mobility-mass spectrometry, and computational modeling, subtle differences between double bond isomers are revealed, confirming three-dimensional geometries constrained by non-covalent ion-molecule interactions. The research explores new avenues for distinguishing lipid double bond isomers and sets the stage for further investigations utilizing coordinating cations to increase resolution.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Maike Lettow, Kim Greis, Marko Grabarics, Jan Horlebein, Rebecca L. Miller, Gerard Meijer, Gert von Helden, Kevin Pagel
Summary: Glycosaminoglycans (GAGs) play vital roles in biological processes and their characterization, particularly chondroitin and dermatan sulfate, poses challenges due to their varying sulfation patterns. Combining mass spectrometry and cryogenic infrared spectroscopy, researchers have identified that the degree and position of sulfate groups impact the conformational landscape in gas phase, providing insights for future sequencing approaches.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Analytical
Marko Grabarics, Maike Lettow, Ansgar T. Kirk, Gert von Helden, Tim J. Causon, Kevin Pagel
Summary: This study extends the plate-height model to explore peak-to-peak resolution and peak capacity in ion mobility separations, providing exact resolution equations and a new peak capacity equation for drift tube ion mobility spectrometry. By refining existing formulas and overcoming limitations of constant assumptions, the study aims to integrate ion mobility spectrometry into the unified language of separation science through theoretical advancements borrowed from chromatography.
JOURNAL OF SEPARATION SCIENCE
(2021)
Article
Biochemical Research Methods
Carla Kirschbaum, Kim Greis, Sandy Gewinner, Wieland Schoellkopf, Gerard Meijer, Gert von Helden, Kevin Pagel
Summary: Tandem mass spectrometry plays a crucial role in elucidating lipid structures, with the coordination of silver ions enabling differentiation of glycerophospholipid isomers. Gas-phase infrared spectroscopy confirms the generation of dioxolane-type fragments from silver-adducted glycerophospholipids, providing qualitative explanations for the fragmentation behaviors of different isomers. This study demonstrates the significant contribution of gas-phase IR spectroscopy to understanding lipid dissociation mechanisms and the effects of coordinating cations.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ya-Ke Li, Fabian Mueller, Wieland Schoellkopf, Knut R. Asmis, Joachim Sauer
Summary: The gas-phase reaction of NiAl2O4+ with CH4 was studied using mass spectrometry, vibrational action spectroscopy, and density functional theory (DFT). The results showed that methane can react to form either a methyl radical or formaldehyde through different pathways. The study also confirmed the proposed mechanism by experimental vibrational spectroscopy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Yun Liu, Zhongkang Han, Sandy Gewinner, Wieland Schollkopf, Sergey V. Levchenko, Helmut Kuhlenbeck, Beatriz Roldan Cuenya
Summary: This study demonstrates the use of surface action spectroscopy (SAS) and density functional theory (DFT) simulations to differentiate between different adatom binding sites and determine the location of Ni and Au single atoms on Fe3O4(001). By combining experimental and theoretical approaches, the researchers reveal the selective binding of Ni and Au atoms to surface oxygen ions and the activation of O-2 by Ni adatoms, providing insights into the understanding of single-atom catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Kim Greis, Carla Kirschbaum, Martin I. Taccone, Michael Goetze, Sandy Gewinner, Wieland Schoellkopf, Gerard Meijer, Gert von Helden, Kevin Pagel
Summary: mRNA-based vaccines have become crucial during the COVID-19 pandemic. This study investigates the mechanism of backbone cleavage of RNA strands and the tautomerization of cytosine in the gas phase using experimental and theoretical approaches. The findings have important implications for the development and analysis of mRNA vaccines.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Physics, Applied
Richarda Niemann, Soeren Wasserroth, Guanyu Lu, Sandy Gewinner, Marco De Pas, Wieland Schoellkopf, Joshua D. Caldwell, Martin Wolf, Alexander Paarmann
Summary: In this work, super-resolution microscopy in the long-wave infrared range is demonstrated using IR-visible sum-frequency generation. Enhanced spatial resolution and differentiation of different polariton modes within nanostructures are achieved.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Li Zi-Yu, Francine Horn, Li Yao, Mou Li-Hui, Wieland Schoellkopf, Chen Hui, He Sheng-Gui, Knut R. Asmis
Summary: In this study, we investigated cluster-mediated C-N bond formation in the gas phase using N-2 as a nitrogen source. The V3C++N-2 reaction was studied using ion-trap mass spectrometry and infrared photodissociation spectroscopy, and the proposed reaction mechanism was validated by identifying the structures of the reactant and product ions. The resulting metal nitride product exhibited characteristic C=N double bond and V-N single bond stretching bands.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Carla Kirschbaum, Reuben S. E. Young, Kim Greis, Jan Philipp Menzel, Sandy Gewinner, Wieland Schoellkopf, Gerard Meijer, Gert von Helden, Tim Causon, Venkateswara R. Narreddula, Berwyck L. J. Poad, Stephen J. Blanksby, Kevin Pagel
Summary: 3-pyridylcarbinol ester derivatization allows for the acquisition of gas-phase infrared spectra of individual lipids, enabling discrimination between isomers and structural assignment of fatty acids. This technique is compatible with conventional chromatography-mass spectrometry and has the potential to uncover new pathways in lipid metabolism.
Article
Chemistry, Inorganic & Nuclear
David Yubero Valdivielso, Christian Kerpal, Wieland Schoellkopf, Gerard Meijer, Andre Fielicke
Summary: A series of saturated ruthenium cluster carbonyls have been synthesized and characterized by infrared spectroscopy. Their size-specific IR spectra in the regions of carbonyl stretch vibration and Ru-C-O bending modes are obtained. The structures of these cluster carbonyls are assigned based on density functional calculations. Different activated CO ligands are identified in these cationic cluster carbonyls, ranging from terminal ligands to symmetrically bridging CO ligands with varying degrees of interaction with additional Ru atoms.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Martin I. Taccone, Daniel A. Thomas, Katja Ober, Sandy Gewinner, Wieland Schoellkopf, Gerard Meijer, Gert von Helden
Summary: Hydrogen bonding interactions play a crucial role in the stability and properties of complex molecular systems, with carboxylic acid groups being common participants. This study focuses on the deprotonated formic acid trimer and investigates its gas-phase conformer and vibrational features through experimental and computational analysis. The results suggest that the prevalent conformer exhibits a planar structure resembling the crystalline structure of formic acid under the experimental conditions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Lee Yeong Kim, Sanghwan Park, Chang Young Lee, Wieland Schollkopf, Bum Suk Zhao
Summary: We report a method to enhance the elastic and coherent reflection of helium clusters from a solid surface under grazing incidence conditions. The use of multiple-edge diffraction enables a higher reflection probability and provides evidence of the coherent and elastic nature of scattering.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
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)
