Article
Chemistry, Multidisciplinary
Maximilian Benz, Thomas M. Klapoetke, Tobias Lenz, Joerg Stierstorfer
Summary: This study investigates the sensitivities and properties of derivatives of 5-azido and 5-nitraminotetrazole compounds through functionalization with different groups. Extensive characterizations and tests were conducted on the obtained products.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Ling Zhang, Mahbod Morshedi, Mahesh S. Kodikara, Mark G. Humphrey
Summary: This article reports the synthesis of the first 2,5,8-s-heptazine-cored organometallic complexes and their exceptional photon absorption performance in the near-infrared III and new 2080-2340 nm region. The use of organometalation approach leads to significant improvement in photo-stability and absorption properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Margaret Fitzgerald, Sarah Shulda, Nicholas A. Strange, Andreas Schneemann, Vitalie Stavila, Liwen F. Wan, Karl Gross, Thomas Gennett, Steven Christensen, Svitlana Pylypenko, Noemi Leick
Summary: Complex metal hydrides have high hydrogen storage capacities but are limited by high temperatures for hydrogen release and slow kinetics for hydrogen uptake. This study investigates the vapor-phase delivery of chemical additives to modify Mg(BH4)2 materials, enabling low-temperature hydrogen release. The combination of characterization techniques, especially electron microscopy, provides insight into the mechanism and accelerates research in hydrogen storage materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Shuo Feng, Rajesh Kumar Singh, Yucheng Fu, Zhuo Li, Yulong Wang, Jie Bao, Zhijie Xu, Guosheng Li, Cassidy Anderson, Lili Shi, Yuehe Lin, Peter G. Khalifah, Wei Wang, Jun Liu, Jie Xiao, Dongping Lu
Summary: In this study, a simple strategy was demonstrated for constructing low-tortuosity through-pores in both vertical and planar directions of electrodes by casting large particles into single-particle-layer electrodes. Through multi-scale characterizations and simulations, correlations between material/electrode structures, electrolyte permeability, polysulfide migration, and sulfur reactions were elucidated. The high-loading and dense sulfur cathode fabricated by this method delivers a high specific capacity at a very low electrolyte/sulfur ratio.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Andrey Petrov, Lawrence Conrad, Nathan T. Coles, Manuela Weber, Dirk Andrae, Almaz Zagidullin, Vasili Miluykov, Christian Mueller
Summary: In this study, a diglyme solution of Na[cyclo-P-5] was reacted with alkynes and isolobal nitriles and phosphaalkynes to obtain (aza)phospholide anions 2 a-c, 4 a,b, and 6. The coordination of these anions with Fe-II resulted in the formation of (aza)phosphametallocenes 3 a-c, 5 a,b and 7. The new compounds were characterized using various spectroscopy and crystallography techniques.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Lindley Maxwell, Hector Martinez, Alejandro Martin-Rodriguez, Silvia Gomez-Coca, Kari Rissanen, Eliseo Ruiz
Summary: The synthesized metalloorganic capsule contains 12 Cu-II centers and 8 ligands, forming a rhombicuboctahedron shape stabilized by pi-pi stacking interactions. It is stable in solution and can form monolayers deposited on graphite.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yi Gong, Cai Wang, Feng Zhou, Kui Liao, Xi-Yu Wang, Ying Sun, Yan-Xue Zhang, Zhi Tu, Xin Wang, Jian Zhou
Summary: This study presents the first highly selective kinetic resolution of racemic alpha-chiral azides through Cu-catalyzed azide-alkyne cycloaddition (CuAAC). Newly developed pyridine-bisoxazoline (PYBOX) ligands bearing a C4 sulfonyl group enabled effective kinetic resolution and asymmetric CuAAC of racemic azides derived from privileged scaffolds such as indanone, cyclopentenone, and oxindole, leading to alpha-tertiary 1,2,3-triazoles with high to excellent ee values. DFT calculations and control experiments revealed that the C4 sulfonyl group decreased the Lewis basicity of the ligand and increased the electrophilicity of the copper center for better recognition of azides, while also functioning as a shielding group to enhance the efficacy of the chiral pocket of the catalyst.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Gurpreet Kaur, Mangalampalli Ravikanth
Summary: A series of novel meso-thienyl and meso-furyl triphyrin(2.1.1)s were synthesized and characterized in this study, revealing significant impact of thienyl/furyl groups on the electronic properties of these compounds. Experimental observations were corroborated by theoretical calculations, indicating consistent results between theory and practice.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Review
Chemistry, Physical
Jakub Cajzl, Pavla Nekvindova, Anna Mackova, Marian Varga, Alexander Kromka
Summary: The presented overview discusses the luminescence properties of lanthanide ions in various dielectric crystalline materials for photonics and optoelectronics. Different crystals with distinct crystal structures were chosen, and the behavior of erbium ions was studied and compared. Theoretical simulations were also conducted to better understand the incorporation of erbium in these crystals.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Keiji Itoh
Summary: The static structure of (Li2S)(x)(GeS2)(100-x) glasses was studied using diffraction measurements and simulation techniques. It was found that the Ge-S network in the glasses is formed by GeS4 tetrahedra linkages. The number of edge-sharing GeS4 tetrahedra decreases with Li2S content, but the ratio to the number of connections remains constant regardless of the composition. Molecular dynamics simulation was used to determine the positions of Li ions in the Ge-S network, showing that each Li ion occupies a deformed octahedral site.
SOLID STATE IONICS
(2022)
Article
Chemistry, Multidisciplinary
Jing Liu, Hong-Li Huang, Chen Wang, Yinghua Li, Huaqiang Li, Honggang Hu, Shipeng He, Hua Tang, Fei Gao
Summary: A visible-light-driven cascade radical cyclization process has been established for the synthesis of alpha-carbonyl alkyl-substituted benzimidazo[2,1-alpha]isoquinolin-6(5H)-ones. This protocol offers an efficient and practical method with outstanding yields, mild reaction conditions, and excellent functional group tolerance.
Article
Chemistry, Organic
Natalie Tober, Johannes Winter, Matthias Jochem, Matthias Lehmann, Heiner Detert
Summary: C-3-symmetrical OXD-BTTs with various alkoxy substitution patterns and chain lengths were synthesized via threefold Huisgen reaction. These compounds exhibit large phase widths and two different mesophases, with the potential for tuning melting and clearing points through chain length variations.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Rebecca R. Mackley, Steven Huband, Tara L. Schiller
Summary: Atherosclerosis is a complex disease, with unique plaque morphology in each individual. Currently, there is a lack of technique to differentiate stable and unstable plaques and identify those at risk of thromboembolic events. Small-and wide-angle X-ray scattering (SAXS/ WAXS) has the potential to identify key materials in plaques, such as cholesterol species, collagen, LDLs, and hydroxyapatite. Protocols for preparing excised human atherosclerotic tissue have been established, leading to improved sample-to-noise ratio and background subtraction.
Article
Chemistry, Multidisciplinary
Rebecca R. Mackley, Steven Huband, Tara L. Schiller
Summary: Atherosclerosis is a complex disease with unique plaque morphology in each individual. Current techniques lack the ability to differentiate stable and unstable plaques, and identify those at risk of thromboembolic events. Small- and wide-angle X-ray scattering (SAXS/WAXS) shows potential in identifying key materials in plaques. Improved protocols for preparing atherosclerotic tissue samples have enhanced the sample-to-noise ratio and background subtraction.
Article
Materials Science, Multidisciplinary
Endale Abebe Gudeta
Summary: This study introduces a modified version of the Enzo-Parrish method to determine a straight background level with a nonzero gradient. The proposed method uses a scattering vector to determine the background and is validated on the XRD peak of a polymer sample.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Janine Kowalke, Christine Arnold, Ilia Ponomarev, Christian Jaeger, Peter Kroll, Erica Brendler, Edwin Kroke
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Christian Posern, Carl-Christoph Hoehne, Uwe Boehme, Claudia Vogt, Edwin Kroke
CHEMISTRY-A EUROPEAN JOURNAL
(2019)
Article
Chemistry, Multidisciplinary
Marcus Herbig, Lia Gevorgyan, Moritz Pflug, Joerg Wagler, Sandra Schwarzer, Edwin Kroke
Article
Chemistry, Multidisciplinary
Janine Kowalke, Joerg Wagler, Christine Viehweger, Erica Brendler, Edwin Kroke
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Editorial Material
Chemistry, Multidisciplinary
Marcus Herbig, Lia Gevorgyan, Moritz Pflug, Joerg Wagler, Sandra Schwarzer, Edwin Kroke
Article
Chemistry, Inorganic & Nuclear
Sebastian Bochmann, Uwe Boehme, Erica Brendler, Mike Friebel, Maik Gerwig, Franziska Grundler, Betty Gunther, Edwin Kroke, Robert Lehnert, Lars Ruppel
Summary: The disproportionation reactions of chlorosilane compounds in the presence of boron trichloride result in the formation of the compound H[B(SiCl3)(4)]. Spectroscopic analyses and crystal structure analysis confirm the highly symmetric borate anion coordinated with silicon, as well as the presence of polar Si-Cl and Si-B bonds. Stabilized highly reactive compounds containing trichlorosilyl groups have been prepared in recent years, with the superacid H[B(SiCl3)(4)] representing a new member in this compound family.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Franziska Gruendler, Henrik Scholz, Marcus Herbig, Sandra Schwarzer, Joerg Wagler, Edwin Kroke
Summary: A novel phosgene-free route to different isocyanates was explored starting from CO2 and aminosilanes. The successful synthesis of isocyanates was achieved through the insertion of CO2 into Si-N bonds of substrates with cyclic amine substituents.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Mike Friebel, Uwe Boehme, Edwin Kroke
Summary: Linear alpha,omega-diphosphaoligosilanes were synthesized and characterized using various spectroscopic techniques. Single crystal structure analyses revealed that these silanes adopt all-transoid conformations in the solid state, with elongated silicon-silicon and silicon-phosphorus bonds. This can be attributed to the bulky phenyl and iso-propyl substituents, as well as effective sigma conjugation along the main chains.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Christopher Ryll, Konstantin Kraushaar, Joerg Wagler, Erica Brendler, Edwin Kroke
Summary: This study investigates the insertion of carbon dioxide into aminodisilanes to form carbamoyloxydisilanes, revealing the structure of some insertion products with pentacoordinate silicon atoms. Extensive analysis, including single-crystal X-ray structure analyses, was conducted on the amino-disilanes and their insertion products. The temperature dependence of the higher coordination was explored using variable temperature NMR experiments.
Article
Crystallography
Marcus Herbig, Edwin Kroke, Joerg Wagler
Summary: A series of silylated 2-aminopyrimidines were synthesized from chlorosilanes and 2-aminopyrimidine using triethylamine as a sacrificial base. The molecular structures of these compounds were determined using various spectroscopic techniques and single-crystal X-ray diffraction analyses. The presence of intramolecular van der Waals contacts and intermolecular hydrogen bonds contributes to the solid-state structures of these compounds.
Article
Polymer Science
Katrin Krupinski, Joerg Wagler, Erica Brendler, Edwin Kroke
Summary: Novel hybrid materials with Si-O-C bridges were obtained through condensation reactions of chlorosilanes (SiCl4 and CH3SiCl3) and bis(trimethylsilyl)ethers of rigid, quasi-linear diols (CH3)3SiO-AR-OSi(CH3)3 (AR = 4,4'-biphenylene and 2,6-naphthylene). Pyridine-catalyzed reactions led to soluble oligomers, while pyridine-catalyzed reactions with SiCl4 resulted in a Sol-Gel transition and the formation of xerogels. The xerogels exhibited low BET surface area and consisted of hydrolytically sensitive three-dimensional networks of SiO4-units linked by the arylene groups.
Article
Chemistry, Multidisciplinary
Claudia Vogt, Carl-Christoph Hoehne, Jennifer Limburger, Alexander Koenig, Tobias Wagener, Edwin Kroke
Summary: This paper presents a convenient method for the synthesis of mixtures of asymmetrical s-triazine phosphonates, which can be used to adjust the thermal behavior and viscosity of the compounds. The synthesis is based on the Michaelis-Arbuzov reaction, and complete conversion of reactants to target compounds is achieved. The results are verified through detailed NMR and elemental analysis, and the thermal behavior is compared using TGA.
Article
Chemistry, Inorganic & Nuclear
Pawel Wyzga, Wilder Carrillo-Cabrera, Lev Akselrud, Igor Veremchuk, Joerg Wagler, Christoph Hennig, Alexander A. Tsirlin, Andreas Leithe-Jasper, Edwin Kroke, Roman Gumeniuk
DALTON TRANSACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Robert Gericke, Christoph Gondek, Andre Stapf, Joerg Wagler, Edwin Kroke, Erica Brendler
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Christine Viehweger, Janine Kowalke, Erica Brendler, Sandra Schwarzer, Claudia Vogt, Edwin Kroke
NEW JOURNAL OF CHEMISTRY
(2020)
