Article
Electrochemistry
Chi-Yang Tsai, Ying-Ling Liu
Summary: Incorporating chemically reactive groups and PEO segments into polyurethanes as binders for silicon anodes in lithium ion batteries successfully addresses the volume change issue during lithiation/delithiation cycles. The multiple interactions and crosslinked structure contribute to stabilizing the anode materials, while PEO segments enhance ion conductivity. The designed multi-functional binders demonstrate high specific capacity, capacity retention, and improved morphological stability, showcasing a successful strategy for silicon anode design and preparation.
ELECTROCHIMICA ACTA
(2021)
Article
Multidisciplinary Sciences
Jaspreet Kaur, Anil Kumar Sarma, Poonam Gera, Mithilesh Kumar Jha
Summary: The article demonstrates a two-step activated carbon preparation technique from corncob, showcasing the effectiveness of AAC-CC in producing solketal. Experimental results show that AAC-CC can achieve a glycerol conversion rate of 80.3% and maintain activity through three consecutive batch reactions.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Reinald Fischer, Helmar Goerls, Philipp Schueler, Regina Suxdorf, Matthias Westerhausen
Summary: This study examines the reaction between 1,4-dioxane and Grignard reagent, resulting in the formation of three magnesium compounds. Further reactions lead to the synthesis of two target compounds. The structures of these compounds were determined through X-ray crystal structure determinations.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Chemistry, Organic
Zhaohui Xu, Huatao Ye, Wenfeng Zhang, Qiang Xiao
Summary: Eleven derivatives of dispirotetrahydroquinoline-bis(1,3-dioxane-4,6-dione) were synthesized through a four-component reaction, showing high yields, broader substrate scope, mild conditions, simple operation, and environmental friendliness. The reaction mechanism was also speculated.
CHINESE JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Engineering, Chemical
Moataz Ali El-Okazy, Liang Liu, Christopher P. Junk, Erich Kathmann, Whitney White, Sandra E. Kentish
Summary: Amorphous glassy perfluorinated polymers possess high gas permeability, chemical inertness, thermal stability, and superior separation performance, particularly when copolymerized with perfluoro(butenyl vinyl ether) (PBVE) and perfluoro(2,2-dimethyl-1,3-dioxole) (PDD) at different ratios. Higher PBVE content results in lower gas permeability and higher selectivity. The copolymers show promising separation performance at high temperatures and exhibit increased H-2/CO2 selectivity with temperature.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Medicinal
Chunpu Li, Sha-Sha Hu, Lisheng Yang, Min Wang, Jian-Dong Long, Bing Wang, Haozhen Han, Haoran Zhu, Sen Zhao, Jing-Gen Liu, Dongxiang Liu, Hong Liu
Summary: A novel SIRT1 inhibitor with potential applications in chemotherapy of various cancers was identified, showing high selectivity and effective inhibitory effects. Enzyme kinetic and molecular docking analyses confirmed the inhibitory mechanism of the inhibitor.
ACS MEDICINAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Organic
Peixin Rui, Zhaohui Xu, Jingli Liu, Qingshui Huang
Summary: The efficient synthesis of dispiro[tetrahydroquinoline-bis(1,3-dioxane-4,6-dione)] derivatives was achieved through a four-component reaction using L-ascorbic acid as an organocatalyst. This method offers advantages of cost-effectiveness, high yields, broad substrate scope, mild conditions, and easy work-up procedure.
Article
Chemistry, Multidisciplinary
E. M. Arzyamova, D. N. Ibragimova, O. Fedotova, N. Pchelintseva
Summary: The behavior of some derivatives of Meldrum's acid with mono- and biazanucleophiles was studied, resulting in the synthesis of aromatic oximes, thiosemicarbazones and hydrazones. The structures of the compounds obtained were confirmed based on H-1, C-13 NMR spectroscopy data and elemental analysis. Contrary to the common mechanism presented in the periodicals, no formation of N-heterocyclic systems was observed under the selected conditions.
IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA I KHIMICHESKAYA TEKHNOLOGIYA
(2021)
Article
Crystallography
Jianlian Liu, Chaojun Du, Hong Hao
Summary: The crystal structure of the substance belongs to the monoclinic system, with cell parameters a = 11.8292 Å, b = 11.0987 Å, c = 11.6480 Å, and β = 115.282 degrees, and the crystal volume is 1382.8 Å^3.
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Tamer Z. Z. Attia, Mahmoud A. A. Abdelmajed, Mahmoud A. A. Omar, Sultan S. S. Al Thagfan, Khalid M. M. Badr El-Din
Summary: A new and cost-effective spectroscopic assay has been developed for the quantification of Colistin Sulfate and its prodrug colistimethate sodium. The assay relies on the reaction of the drugs with specific reagents to generate a fluorescent product, allowing for the measurement of drug concentrations. The method has been validated and can be used to evaluate commercial products containing the studied drugs, with the addition of a content uniformity testing step.
Article
Chemistry, Organic
Victorino Vallejos Gonzalez, Joachim Podlech
Summary: This study found that sulfur groups in different sulfur compounds exhibit different behaviors during oxidation reactions, with some behaving independently and others influencing each other. The oxidation of conformationally constrained dithiane derivative also showed unique properties in the formation of different oxidation products. The exclusive formation of sulfones by permanganate is attributed to its special oxidation mechanism involving sulfur as both nucleophile and electrophilic moiety.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Engineering, Chemical
Abby N. Harders, Sarah Dixon, Brock Hines, Michael Lundin, Whitney White, Mark B. Shiflett
Summary: The separation and recycling of azeotropic refrigerant mixtures is important due to recent regulations. Polymeric membranes can effectively separate mixtures based on solubility and diffusivity differences. This study investigated the use of PDD-co-VA copolymer for refrigerant separation and found that it exhibited high selectivity and permeability for various refrigerants.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
K. S. Smirnova, E. A. Ivanova, T. S. Sukhikh, I. P. Pozdnyakov, V. V. Dotsenko, E. Lider
Summary: Seven lanthanide-based coordination compounds were synthesized with a ligand emitting in the blue region with a quantum yield near 12%. The structures of cerium and samarium were determined to be polymer chains, while the dysprosium compound was found to be mononuclear. Energy transfer from the ligand triplet state to the central atom was observed in Eu(III), Sm(III), and Tb(III) complexes, with characteristic metal ion bands in the emission spectra.
INORGANICA CHIMICA ACTA
(2021)
Article
Chemistry, Inorganic & Nuclear
Dohyun Moon, Jong-Ha Choi
Summary: A new complex trans-anti/syn-[CrBr2(Me2tn)2]2ZnBr4 was synthesized and characterized by single-crystal X-ray diffraction and infrared spectroscopy, showing interesting coordination geometries. The crystal lattice is stabilized by hydrogen-bonding interactions between the bromides and NH groups of the ligands.
INORGANICA CHIMICA ACTA
(2021)
Article
Chemistry, Organic
Wei Fan
Summary: Unexpected bicyclization reactions of 1-aryl pyrazol-5-amines with 2,2-dihydroxyindene-1,3-dione have been developed, leading to the selective synthesis of 2,6-naphthyridines and pyrrolizines. The formation of 2,6-naphthyridines involves a special double [3 + 2 + 1] heteroannulation accompanied by direct CeC formation between two electrophilic sites of 2,2-dihydroxyindene-1,3-dione. On the other hand, pyrrolizines are obtained through a novel [3 + 2]/[4 + 1] heteroannulation with good yields. The mechanisms for the construction of these new heterocyclic skeletons are proposed.
